8306703: JFR: Summary views

Reviewed-by: mgronlun

make/modules/jdk.jfr/Java.gmk

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -24,5 +24,5 @@
 #
 
 DISABLED_WARNINGS_java += exports
-COPY := .xsd .xml .dtd
+COPY := .xsd .xml .dtd .ini
 JAVAC_FLAGS := -XDstringConcat=inline

src/hotspot/share/jfr/dcmd/jfrDcmds.cpp

@@ -52,6 +52,9 @@ bool register_jfr_dcmds() {
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrDumpFlightRecordingDCmd>(full_export, true, false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrStartFlightRecordingDCmd>(full_export, true, false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrStopFlightRecordingDCmd>(full_export, true, false));
+  // JFR.query Uncomment when developing new queries for the JFR.view command
+  // DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrQueryFlightRecordingDCmd>(full_export, true, true));
+  DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrViewFlightRecordingDCmd>(full_export, true, false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrConfigureFlightRecorderDCmd>(full_export, true, false));
   return true;
 }
@@ -318,7 +321,7 @@ static DCmdArgumentInfo* create_info(oop argument, TRAPS) {
     read_string_field(argument, "type", THREAD),
     read_string_field(argument, "defaultValue", THREAD),
     read_boolean_field(argument, "mandatory", THREAD),
-    true, // a DcmdFramework "option"
+    read_boolean_field(argument, "option", THREAD),
     read_boolean_field(argument, "allowMultiple", THREAD));
 }
 

src/hotspot/share/jfr/dcmd/jfrDcmds.hpp

@@ -145,6 +145,56 @@ class JfrStopFlightRecordingDCmd : public JfrDCmd {
   }
 };
 
+class JfrViewFlightRecordingDCmd : public JfrDCmd {
+ public:
+  JfrViewFlightRecordingDCmd(outputStream* output, bool heap) : JfrDCmd(output, heap, num_arguments()) {}
+
+  static const char* name() {
+    return "JFR.view";
+  }
+  static const char* description() {
+    return "Display event data in predefined views";
+  }
+  static const char* impact() {
+    return "Medium";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission", "monitor", NULL};
+    return p;
+  }
+  virtual const char* javaClass() const {
+    return "jdk/jfr/internal/dcmd/DCmdView";
+  }
+  static int num_arguments() {
+    return 7;
+  }
+};
+
+class JfrQueryFlightRecordingDCmd : public JfrDCmd {
+ public:
+  JfrQueryFlightRecordingDCmd(outputStream* output, bool heap) : JfrDCmd(output, heap, num_arguments()) {}
+
+  static const char* name() {
+    return "JFR.query";
+  }
+  static const char* description() {
+    return "Query and display event data in a tabular form";
+  }
+  static const char* impact() {
+    return "Medium";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission", "monitor", NULL};
+    return p;
+  }
+  virtual const char* javaClass() const {
+    return "jdk/jfr/internal/dcmd/DCmdQuery";
+  }
+  static int num_arguments() {
+    return 5;
+  }
+};
+
 class JfrConfigureFlightRecorderDCmd : public DCmdWithParser {
   friend class JfrOptionSet;
  protected:

src/jdk.jfr/share/classes/jdk/jfr/internal/OldObjectSample.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -79,7 +79,7 @@ public final class OldObjectSample {
         }
     }
 
-    private static void emit(long ticks) {
+    public static void emit(long ticks) {
         boolean emitAll = WhiteBox.getWriteAllObjectSamples();
         boolean skipBFS = WhiteBox.getSkipBFS();
         JVM.getJVM().emitOldObjectSamples(ticks, emitAll, skipBFS);

src/jdk.jfr/share/classes/jdk/jfr/internal/PlatformRecorder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -420,7 +420,7 @@ public final class PlatformRecorder {
         return runningRecordings;
     }
 
-    private List<RepositoryChunk> makeChunkList(Instant startTime, Instant endTime) {
+    public List<RepositoryChunk> makeChunkList(Instant startTime, Instant endTime) {
         Set<RepositoryChunk> chunkSet = new HashSet<>();
         for (PlatformRecording r : getRecordings()) {
             chunkSet.addAll(r.getChunks());
@@ -438,7 +438,7 @@ public final class PlatformRecorder {
             return chunks;
         }
 
-        return Collections.emptyList();
+        return new ArrayList<>();
     }
 
     private void startDiskMonitor() {
@@ -454,6 +454,8 @@ public final class PlatformRecorder {
                 r.appendChunk(chunk);
             }
         }
+        // Decrease initial reference count
+        chunk.release();
         FilePurger.purge();
     }
 
@@ -659,4 +661,8 @@ public final class PlatformRecorder {
             rotateDisk();
         }
     }
+
+    public RepositoryChunk getCurrentChunk() {
+        return currentChunk;
+    }
 }

src/jdk.jfr/share/classes/jdk/jfr/internal/RepositoryChunk.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -33,7 +33,7 @@ import java.util.Comparator;
 
 import jdk.jfr.internal.SecuritySupport.SafePath;
 
-final class RepositoryChunk {
+public final class RepositoryChunk {
 
     static final Comparator<RepositoryChunk> END_TIME_COMPARATOR = new Comparator<RepositoryChunk>() {
         @Override
@@ -47,7 +47,7 @@ final class RepositoryChunk {
 
     private Instant endTime = null; // unfinished
     private Instant startTime;
-    private int refCount = 0;
+    private int refCount = 1;
     private long size;
 
     RepositoryChunk(SafePath path) throws Exception {
@@ -166,4 +166,12 @@ final class RepositoryChunk {
     public SafePath getFile() {
         return chunkFile;
     }
+
+    public long getCurrentFileSize() {
+        try {
+            return SecuritySupport.getFileSize(chunkFile);
+        } catch (IOException e) {
+            return 0L;
+        }
+    }
 }

src/jdk.jfr/share/classes/jdk/jfr/internal/Utils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -55,6 +55,7 @@ import java.util.Objects;
 
 import jdk.internal.module.Checks;
 import jdk.jfr.Event;
+import jdk.jfr.EventType;
 import jdk.jfr.FlightRecorderPermission;
 import jdk.jfr.Recording;
 import jdk.jfr.RecordingState;
@@ -859,4 +860,12 @@ public final class Utils {
             }
         }
     }
+
+    public static String makeSimpleName(EventType type) {
+      return makeSimpleName(type.getName());
+    }
+
+    public static String makeSimpleName(String qualified) {
+        return qualified.substring(qualified.lastIndexOf(".") + 1);
+    }
 }

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/AbstractDCmd.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -38,6 +38,8 @@ import java.util.List;
 import jdk.jfr.FlightRecorder;
 import jdk.jfr.Recording;
 import jdk.jfr.internal.JVM;
+import jdk.jfr.internal.util.Output.LinePrinter;
+import jdk.jfr.internal.util.Output;
 import jdk.jfr.internal.LogLevel;
 import jdk.jfr.internal.LogTag;
 import jdk.jfr.internal.Logger;
@@ -50,9 +52,7 @@ import jdk.jfr.internal.Utils;
  *
  */
 abstract class AbstractDCmd {
-
+    private final LinePrinter output = new LinePrinter();
-    private final StringBuilder currentLine = new StringBuilder(80);
-    private final List<String> lines = new ArrayList<>();
     private String source;
 
     // Called by native
@@ -94,13 +94,16 @@ abstract class AbstractDCmd {
        }
     }
 
+    protected final Output getOutput() {
+        return output;
+    }
 
     protected final FlightRecorder getFlightRecorder() {
         return FlightRecorder.getFlightRecorder();
     }
 
     protected final String[] getResult() {
-        return lines.toArray(new String[lines.size()]);
+        return output.getLines().toArray(new String[0]);
     }
 
     protected void logWarning(String message) {
@@ -181,21 +184,19 @@ abstract class AbstractDCmd {
     }
 
     protected final void println() {
-        lines.add(currentLine.toString());
+        output.println();
-        currentLine.setLength(0);
     }
 
     protected final void print(String s) {
-        currentLine.append(s);
+        output.print(s);
     }
 
     protected final void print(String s, Object... args) {
-        currentLine.append(args.length > 0 ? String.format(s, args) : s);
+        output.print(s, args);
     }
 
     protected final void println(String s, Object... args) {
-        print(s, args);
+        output.println(s, args);
-        println();
     }
 
     protected final void printBytes(long bytes) {
@@ -218,6 +219,12 @@ abstract class AbstractDCmd {
         }
     }
 
+    protected final void printHelpText() {
+        for (String line : printHelp()) {
+            println(line);
+        }
+    }
+
     protected final void printPath(Path path) {
         try {
             println(path.toAbsolutePath().toString());

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/Argument.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,6 +29,7 @@ record Argument(
     String description,
     String type,
     boolean mandatory,
+    boolean option,
     String defaultValue,
     boolean allowMultiple
 ) { }

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/ArgumentParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -35,6 +35,7 @@ import java.util.StringJoiner;
 final class ArgumentParser {
     private final Map<String, Object> options = new HashMap<>();
     private final Map<String, Object> extendedOptions = new HashMap<>();
+    private final List<String> conflictedOptions = new ArrayList<>();
     private final StringBuilder builder = new StringBuilder();
     private final String text;
     private final char delimiter;
@@ -42,8 +43,7 @@ final class ArgumentParser {
     private final String valueDelimiter;
     private final Argument[] arguments;
     private int position;
-
+    private int argumentIndex;
-    private final List<String> conflictedOptions = new ArrayList<>();
 
     ArgumentParser(Argument[] arguments, String text, char delimiter) {
         this.text = text;
@@ -60,6 +60,11 @@ final class ArgumentParser {
             String value = null;
             if (accept('=')) {
                 value = readText(valueDelimiter);
+            } else {
+                if (hasArgumentsLeft()) {
+                    value = key;
+                    key = nextArgument().name();
+                }
             }
             if (!atEnd() && !accept(delimiter)) { // must be followed by delimiter
                 throw new IllegalArgumentException("Expected delimiter, but found " + currentChar());
@@ -72,6 +77,25 @@ final class ArgumentParser {
         return options;
     }
 
+    private boolean hasArgumentsLeft() {
+        for (int index = argumentIndex; index < arguments.length; index++) {
+            if (!arguments[index].option()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private Argument nextArgument() {
+        while (argumentIndex < arguments.length) {
+            Argument argument = arguments[argumentIndex++];
+            if (!argument.option()) {
+                return argument;
+            }
+        }
+        return null;
+    }
+
     protected void checkConflict() {
         if (conflictedOptions.isEmpty()) {
             return;
@@ -97,14 +121,15 @@ final class ArgumentParser {
         throw new IllegalArgumentException(sb.toString());
     }
 
-    private void checkMandatory() {
+    public boolean checkMandatory() {
         for (Argument arg : arguments) {
             if (!options.containsKey(arg.name())) {
                 if (arg.mandatory()) {
-                    throw new IllegalArgumentException("The argument '" + arg.name() + "' is mandatory");
+                    return false;
                 }
             }
         }
+        return true;
     }
 
     @SuppressWarnings({"unchecked", "rawtypes"})
@@ -194,6 +219,7 @@ final class ArgumentParser {
 
     private Object value(String name, String type, String text) {
         return switch (type) {
+            case "JULONG" -> parseLong(name, text);
             case "STRING", "STRING SET" -> text == null ? "" : text;
             case "BOOLEAN" -> parseBoolean(name, text);
             case "NANOTIME" -> parseNanotime(name, text);
@@ -202,6 +228,22 @@ final class ArgumentParser {
         };
     }
 
+    private Long parseLong(String name, String text) {
+        if (text == null) {
+            throw new IllegalArgumentException("Parsing error long value: syntax error, value is null");
+        }
+        try {
+            long value = Long.parseLong(text);
+            if (value >= 0) {
+                return value;
+            }
+        } catch (NumberFormatException nfe) {
+          // fall through
+        }
+        String msg = "Integer parsing error in command argument '" + name + "'. Could not parse: " + text + ".";
+        throw new IllegalArgumentException(msg);
+    }
+
     private Boolean parseBoolean(String name, String text) {
         if ("true".equals(text)) {
             return Boolean.TRUE;

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/DCmdCheck.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -169,10 +169,10 @@ final class DCmdCheck extends AbstractDCmd {
         return new Argument[] {
             new Argument("name",
                 "Recording name, e.g. \\\"My Recording\\\" or omit to see all recordings",
-                "STRING", false, null, false),
+                "STRING", false, true, null, false),
             new Argument("verbose",
                 "Print event settings for the recording(s)","BOOLEAN",
-                false, "false", false)
+                false, true, "false", false)
         };
     }
 }

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/DCmdDump.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -281,24 +281,24 @@ final class DCmdDump extends AbstractDCmd {
         return new Argument[] {
            new Argument("name",
                "Recording name, e.g. \\\"My Recording\\\"",
-               "STRING", false, null, false),
+               "STRING", false, true, null, false),
            new Argument("filename",
                "Copy recording data to file, e.g. \\\"" + exampleFilename() + "\\\"",
-               "STRING", false, null, false),
+               "STRING", false, true, null, false),
            new Argument("maxage",
                "Maximum duration to dump, in (s)econds, (m)inutes, (h)ours, or (d)ays, e.g. 60m, or 0 for no limit",
-               "NANOTIME", false, null, false),
+               "NANOTIME", false, true, null, false),
            new Argument("maxsize", "Maximum amount of bytes to dump, in (M)B or (G)B, e.g. 500M, or 0 for no limit",
-               "MEMORY SIZE", false, "hotspot-pid-xxxxx-id-y-YYYY_MM_dd_HH_mm_ss.jfr", false),
+               "MEMORY SIZE", false, true, "hotspot-pid-xxxxx-id-y-YYYY_MM_dd_HH_mm_ss.jfr", false),
            new Argument("begin",
                "Point in time to dump data from, e.g. 09:00, 21:35:00, 2018-06-03T18:12:56.827Z, 2018-06-03T20:13:46.832, -10m, -3h, or -1d",
-               "STRING", false, null, false),
+               "STRING", false, true, null, false),
            new Argument("end",
                "Point in time to dump data to, e.g. 09:00, 21:35:00, 2018-06-03T18:12:56.827Z, 2018-06-03T20:13:46.832, -10m, -3h, or -1d",
-               "STRING", false, null, false),
+               "STRING", false, true, null, false),
            new Argument("path-to-gc-roots",
                "Collect path to GC roots",
-               "BOOLEAN", false, "false", false)
+               "BOOLEAN", false, true, "false", false)
         };
     }
 }

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/DCmdQuery.java

@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.dcmd;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.List;
+
+import jdk.jfr.internal.query.Configuration;
+import jdk.jfr.internal.query.QueryPrinter;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
+
+/**
+ * JFR.query
+ */
+// Instantiated by native
+public final class DCmdQuery extends AbstractDCmd {
+
+    protected void execute(ArgumentParser parser) throws DCmdException {
+        parser.checkUnknownArguments();
+        if (!parser.checkMandatory()) {
+            println("The argument 'query' is mandatory");
+            println();
+            printHelpText();
+            return;
+        }
+
+        Configuration configuration = new Configuration();
+        configuration.output = getOutput();
+        configuration.endTime = Instant.now().minusSeconds(1);
+        Boolean verbose = parser.getOption("verbose");
+        if (verbose != null) {
+            configuration.verboseHeaders = verbose;
+        }
+        try (QueryRecording recording = new QueryRecording(configuration, parser)) {
+            QueryPrinter printer = new QueryPrinter(configuration, recording.getStream());
+            String query = parser.getOption("query");
+            printer.execute(stripQuotes(query));
+        } catch (UserDataException e) {
+            throw new DCmdException(e.getMessage());
+        } catch (UserSyntaxException e) {
+            throw new DCmdException(e.getMessage());
+        } catch (IOException e) {
+            throw new DCmdException("Could not open repository. " + e.getMessage());
+        } catch (IllegalArgumentException e) {
+            throw new DCmdException(e.getMessage() + ". See help JFR.query");
+        }
+    }
+
+    private String stripQuotes(String text) {
+        if (text.startsWith("\"")) {
+            text = text.substring(1);
+        }
+        if (text.endsWith("\"")) {
+            text = text.substring(0, text.length() - 1);
+        }
+        return text;
+    }
+
+    @Override
+    public String[] printHelp() {
+        List<String> lines = new ArrayList<>();
+        lines.addAll(getOptions().lines().toList());
+        lines.add("");
+        lines.addAll(QueryPrinter.getGrammarText().lines().toList());
+        lines.add("");
+        lines.addAll(getExamples().lines().toList());
+        return lines.toArray(String[]::new);
+    }
+
+    private String getExamples() {
+              // 0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890
+        return """
+                 Example usage:
+
+                  $ jcmd <pid> JFR.query '"SHOW EVENTS"'
+
+                  $ jcmd <pid> JFR.query '"SHOW FIELDS ObjectAllocationSample"'
+
+                  $ jcmd <pid> JFR.query '"SELECT * FROM ObjectAllocationSample"'
+                                        verbose=true maxsize=10M
+
+                  $ jcmd <pid> JFR.query '"SELECT pid, path FROM SystemProcess"'
+                                        width=100
+
+                  $ jcmd <pid> JFR.query '"SELECT stackTrace.topFrame AS T, SUM(weight)
+                                        FROM ObjectAllocationSample GROUP BY T"'
+                                        maxage=100s
+
+                  $ jcmd <pid> JFR.query '"CAPTION 'Method', 'Percentage'
+                                        FORMAT default, normalized;width:10
+                                        SELECT stackTrace.topFrame AS T, COUNT(*) AS C
+                                        GROUP BY T
+                                        FROM ExecutionSample ORDER BY C DESC"'
+
+                  $ jcmd <pid> JFR.query '"CAPTION 'Start', 'GC ID', 'Heap Before GC',
+                                        'Heap After GC', 'Longest Pause'
+                                        SELECT G.startTime, G.gcId, B.heapUsed,
+                                               A.heapUsed, longestPause
+                                        FROM GarbageCollection AS G,
+                                             GCHeapSummary AS B,
+                                             GCHeapSummary AS A
+                                        WHERE B.when = 'Before GC' AND A.when = 'After GC'
+                                        GROUP BY gcId
+                                        ORDER BY G.startTime"'""";
+    }
+
+    private String getOptions() {
+             // 0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890
+        return """
+                Syntax : JFR.query [options]
+
+                Options:
+
+                  maxage     (Optional) Length of time for the query to span. (INTEGER followed by
+                             's' for seconds 'm' for minutes or 'h' for hours, no default value)
+
+                  maxsize    (Optional) Maximum size for the query to span in bytes if one of
+                             the following suffixes is not used: 'm' or 'M' for megabytes OR
+                             'g' or 'G' for gigabytes. (STRING, no default value)
+
+                  <query>    (Mandatory) Query, for example '"SELECT * FROM GarbageCollection"'
+                             See below for grammar. (STRING, no default value)
+
+                  verbose    (Optional) Display additional information about the query execution.
+                             (BOOLEAN, false)
+
+                  width      (Optional) Maximum number of horizontal characters. (BOOLEAN, false)""";
+    }
+
+    @Override
+    public Argument[] getArgumentInfos() {
+        return new Argument[] {
+            new Argument("maxage",
+                    "Length of time for the query to span, in (s)econds, (m)inutes, (h)ours, or (d)ays, e.g. 60m, or 0 for no limit",
+                    "NANOTIME", false, true, "10m", false),
+            new Argument("maxsize",
+                    "Maximum size for the query to span, in (M)B or (G)B, e.g. 500M, or 0 for no limit",
+                    "MEMORY SIZE", false, true, "100M", false),
+            new Argument("query", "Query, for example 'SELECT * FROM GarbageCollection'", "STRING", true, false,
+                    null, false),
+            new Argument("verbose", "Display additional information about the query execution", "BOOLEAN", false,
+                    true, "false", false),
+            new Argument("width", "Maximum number of horizontal characters", "JULONG", false, true, "100",
+                    false), };
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/DCmdStart.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -456,37 +456,37 @@ final class DCmdStart extends AbstractDCmd {
         return new Argument[] {
             new Argument("name",
                 "Name that can be used to identify recording, e.g. \\\"My Recording\\\"",
-                "STRING", false, null, false),
+                "STRING", false, true, null, false),
             new Argument("settings",
                 "Settings file(s), e.g. profile or default. See JAVA_HOME/lib/jfr",
-                "STRING SET", false, "deafult.jfc", true),
+                "STRING SET", false, true, "default.jfc", true),
             new Argument("delay",
                 "Delay recording start with (s)econds, (m)inutes), (h)ours), or (d)ays, e.g. 5h.",
-                "NANOTIME", false, "0s", false),
+                "NANOTIME", false, true, "0s", false),
             new Argument("duration",
                 "Duration of recording in (s)econds, (m)inutes, (h)ours, or (d)ays, e.g. 300s.",
-                "NANOTIME", false, null, false),
+                "NANOTIME", false, true, null, false),
             new Argument("disk",
                 "Recording should be persisted to disk",
-                "BOOLEAN", false, "true", false),
+                "BOOLEAN", false, true, "true", false),
             new Argument("filename",
                 "Resulting recording filename, e.g. \\\"" + exampleFilename() +  "\\\"",
-                "STRING", false, "hotspot-pid-xxxxx-id-y-YYYY_MM_dd_HH_mm_ss.jfr", false),
+                "STRING", false, true, "hotspot-pid-xxxxx-id-y-YYYY_MM_dd_HH_mm_ss.jfr", false),
             new Argument("maxage",
                 "Maximum time to keep recorded data (on disk) in (s)econds, (m)inutes, (h)ours, or (d)ays, e.g. 60m, or 0 for no limit",
-                "NANOTIME", false, "0", false),
+                "NANOTIME", false, true, "0", false),
             new Argument("maxsize",
                 "Maximum amount of bytes to keep (on disk) in (k)B, (M)B or (G)B, e.g. 500M, or 0 for no limit",
-                "MEMORY SIZE", false, "250M", false),
+                "MEMORY SIZE", false, true, "250M", false),
             new Argument("flush-interval",
                 "Minimum time before flushing buffers, measured in (s)econds, e.g. 4 s, or 0 for flushing when a recording ends",
-                "NANOTIME", false, "1s", false),
+                "NANOTIME", false, true, "1s", false),
             new Argument("dumponexit",
                 "Dump running recording when JVM shuts down",
-                "BOOLEAN", false, "false", false),
+                "BOOLEAN", false, true, "false", false),
             new Argument("path-to-gc-roots",
                 "Collect path to GC roots",
-                "BOOLEAN", false, "false", false)
+                "BOOLEAN", false, true, "false", false)
         };
     }
 }

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/DCmdStop.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -104,10 +104,10 @@ final class DCmdStop extends AbstractDCmd {
         return new Argument[] {
             new Argument("name",
                 "Recording name, e.g. \\\"My Recording\\\"",
-                "STRING", true, null, false),
+                "STRING", true, true, null, false),
             new Argument("filename",
                 "Copy recording data to file, e.g. \\\"" + exampleFilename() +  "\\\"",
-                "STRING", false, null, false)
+                "STRING", false, true, null, false)
         };
     }
 }

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/DCmdView.java

@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.dcmd;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.List;
+
+import jdk.jfr.internal.OldObjectSample;
+import jdk.jfr.internal.Utils;
+import jdk.jfr.internal.query.Configuration;
+import jdk.jfr.internal.query.QueryPrinter;
+import jdk.jfr.internal.query.ViewPrinter;
+import jdk.jfr.internal.util.Columnizer;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
+/**
+ * JFR.view
+ * <p>
+ * The implementation is also used by DCmdQuery since there
+ * is little difference between JFR.query and JFR.view.
+ */
+// Instantiated by native
+public class DCmdView extends AbstractDCmd {
+
+    protected void execute(ArgumentParser parser) throws DCmdException {
+        parser.checkUnknownArguments();
+        if (!parser.checkMandatory()) {
+            println("The argument 'view' is mandatory");
+            println();
+            printHelpText();
+            return;
+        }
+        Configuration configuration = new Configuration();
+        configuration.output = getOutput();
+        configuration.endTime = Instant.now().minusSeconds(1);
+        String view = parser.getOption("view");
+        if (view.startsWith("memory-leaks")) {
+            // Make sure old object sample event is part of data.
+            OldObjectSample.emit(0);
+            Utils.waitFlush(10_000);
+            configuration.endTime = Instant.now();
+        }
+        try (QueryRecording recording = new QueryRecording(configuration, parser)) {
+            ViewPrinter printer = new ViewPrinter(configuration, recording.getStream());
+            printer.execute(view);
+        } catch (UserDataException e) {
+            throw new DCmdException(e.getMessage());
+        } catch (UserSyntaxException e) {
+            throw new DCmdException(e.getMessage());
+        } catch (IOException e) {
+            throw new DCmdException("Could not open repository. " + e.getMessage());
+        } catch (IllegalArgumentException e) {
+            throw new DCmdException(e.getMessage() + ". See help JFR.view");
+        }
+    }
+
+    @Override
+    public String[] printHelp() {
+        List<String> lines = new ArrayList<>();
+        lines.addAll(getOptions().lines().toList());
+        lines.add("");
+        lines.addAll(ViewPrinter.getAvailableViews());
+        lines.add("");
+        lines.add(" The <view> parameter can be an event type name. Use the 'JFR.view types'");
+        lines.add(" to see a list. To display all views, use 'JFR.view all-views'. To display");
+        lines.add(" all events, use 'JFR.view all-events'.");
+        lines.add("");
+        lines.addAll(getExamples().lines().toList());
+        return lines.toArray(String[]::new);
+    }
+
+    public String getOptions() {
+        // 0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890
+        return """
+                Options:
+
+                 cell-height   (Optional) Maximum number of rows in a table cell. (INTEGER, no default value)
+
+                 maxage        (Optional) Length of time for the view to span. (INTEGER followed by
+                               's' for seconds 'm' for minutes or 'h' for hours, default value is 10m)
+
+                 maxsize       (Optional) Maximum size for the view to span in bytes if one of
+                               the following suffixes is not used: 'm' or 'M' for megabytes OR
+                               'g' or 'G' for gigabytes. (STRING, default value is 32MB)
+
+                 truncate      (Optional) How to truncate content that exceeds space in a table cell.
+                               Mode can be 'beginning' or 'end'. (STRING, default value 'end')
+
+                 verbose       (Optional) Displays the query that makes up the view.
+                               (BOOLEAN, default value false)
+
+                 <view>        (Mandatory) Name of the view or event type to display.
+                               See list below for available views. (STRING, no default value)
+
+                 width         (Optional) The width of the view in characters
+                               (INTEGER, no default value)""";
+    }
+
+    public String getExamples() {
+        return """
+                Example usage:
+
+                 $ jcmd <pid> JFR.view gc
+
+                 $ jcmd <pid< JFR.view width=160 hot-methods
+
+                 $ jcmd <pid> JFR.view verbose=true allocation-by-class
+
+                 $ jcmd <pid> JFR.view contention-by-site
+
+                 $ jcmd <pid> JFR.view jdk.GarbageCollection
+
+                 $ jcmd <pid> JFR.view cell-height=5 ThreadStart
+
+                 $ jcmd <pid> JFR.view truncate=beginning SystemProcess""";
+    }
+
+    @Override
+    public Argument[] getArgumentInfos() {
+        return new Argument[] {
+            new Argument("cell-height",
+                "Maximum heigth of a table cell",
+                "JULONG", false, true, "1", false),
+            new Argument("maxage",
+                "Maximum duration of data to view, in (s)econds, (m)inutes, (h)ours, or (d)ays, e.g. 60m, or 0 for no limit",
+                "NANOTIME", false, true, "10m", false),
+            new Argument("maxsize",
+                "Maximum amount of bytes to view, in (M)B or (G)B, e.g. 500M, or 0 for no limit",
+                "MEMORY SIZE", false, true, "100M", false),
+            new Argument("truncate",
+                "Truncation mode if value doesn't fit in a table cell, valid values are 'beginning' and 'end'",
+                "STRING", false, true, "end", false),
+            new Argument("verbose",
+                "Display additional information about the view, such as the underlying query",
+                "BOOLEAN", false, true, "false", false),
+            new Argument("view",
+                "Name of the view, for example hot-methods",
+                "STRING", true, false, null, false),
+            new Argument("width",
+                "Maximum number of horizontal characters",
+                "JULONG", false, true, "100", false)
+        };
+   }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/QueryRecording.java

@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.dcmd;
+
+import java.io.IOException;
+import java.time.Duration;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.ListIterator;
+
+import jdk.jfr.FlightRecorder;
+import jdk.jfr.consumer.EventStream;
+import jdk.jfr.internal.PlatformRecorder;
+import jdk.jfr.internal.PrivateAccess;
+import jdk.jfr.internal.RepositoryChunk;
+import jdk.jfr.internal.query.Configuration;
+import jdk.jfr.internal.query.QueryPrinter;
+import jdk.jfr.internal.query.ViewPrinter;
+import jdk.jfr.internal.query.Configuration.Truncate;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
+import jdk.jfr.internal.util.Output;
+
+/**
+ * Helper class that holds recording chunks alive during a query. It also helps
+ * out with configuration shared by DCmdView and DCmdQuery
+ */
+final class QueryRecording implements AutoCloseable {
+    private final long DEFAULT_MAX_SIZE = 32 * 1024 * 1024L;
+    private final long DEFAULT_MAX_AGE = 60 * 10;
+
+    private final PlatformRecorder recorder;
+    private final List<RepositoryChunk> chunks;
+    private final EventStream eventStream;
+    private final Instant endTime;
+
+    public QueryRecording(Configuration configuration, ArgumentParser parser) throws IOException, DCmdException {
+        if (!FlightRecorder.isInitialized()) {
+            throw new DCmdException("No recording data available. Start a recording with JFR.start");
+        }
+        recorder = PrivateAccess.getInstance().getPlatformRecorder();
+        Boolean verbose = parser.getOption("verbose");
+        if (verbose != null) {
+            configuration.verbose = verbose;
+        }
+        configuration.truncate = valueOf(parser.getOption("truncate"));
+        Long width = parser.getOption("width");
+        if (width != null) {
+            configuration.width = (int) Math.min(Integer.MAX_VALUE, width.longValue());
+        }
+        Long height = parser.getOption("cell-height");
+        if (height != null) {
+            if (height < 1) {
+                throw new DCmdException("Height must be at least 1");
+            }
+            configuration.cellHeight = (int) Math.min(Integer.MAX_VALUE, height.longValue());
+        }
+        Long maxAge = parser.getOption("maxage");
+
+        Long maxSize = parser.getOption("maxsize");
+        if (maxSize == null) {
+            maxSize = DEFAULT_MAX_SIZE;;
+        }
+        Instant startTime = Instant.EPOCH;
+        endTime = configuration.endTime;
+        if (maxAge != null) {
+            startTime = endTime.minus(Duration.ofNanos(maxAge));
+        } else {
+            startTime = endTime.minus(Duration.ofSeconds(DEFAULT_MAX_AGE));
+        }
+        chunks = acquireChunks(startTime);
+        Instant streamStart = determineStreamStart(maxSize, startTime);
+        configuration.startTime = streamStart;
+        eventStream = makeStream(streamStart);
+    }
+
+    private List<RepositoryChunk> acquireChunks(Instant startTime) {
+        synchronized (recorder) {
+            List<RepositoryChunk> list = recorder.makeChunkList(startTime, endTime);
+            list.add(currentChunk());
+            for (RepositoryChunk r : list) {
+                r.use();
+            }
+            return list;
+        }
+    }
+
+    private RepositoryChunk currentChunk() {
+        return PrivateAccess.getInstance().getPlatformRecorder().getCurrentChunk();
+    }
+
+    private void releaseChunks() {
+        synchronized (recorder) {
+            for (RepositoryChunk r : chunks) {
+                r.release();
+            }
+        }
+    }
+
+    private EventStream makeStream(Instant startTime) throws IOException {
+        EventStream es = EventStream.openRepository();
+        es.setStartTime(startTime);
+        es.setEndTime(endTime);
+        return es;
+    }
+
+    private Instant determineStreamStart(Long maxSize, Instant startTime) {
+        ListIterator<RepositoryChunk> iterator = chunks.listIterator(chunks.size());
+        long size = 0;
+        while (iterator.hasPrevious()) {
+            RepositoryChunk r = iterator.previous();
+            if (r.isFinished()) {
+                size += r.getSize();
+                if (size > maxSize) {
+                    return r.getStartTime().isAfter(startTime) ? r.getStartTime() : startTime;
+                }
+            } else {
+                size += r.getCurrentFileSize();
+            }
+        }
+        return startTime;
+    }
+
+    private Truncate valueOf(String truncate) throws DCmdException {
+        if (truncate == null || truncate.equals("end")) {
+            return Truncate.END;
+        }
+        if (truncate.equals("beginning")) {
+            return Truncate.BEGINNING;
+        }
+        throw new DCmdException("Truncate must be 'end' or 'beginning");
+    }
+
+    public EventStream getStream() {
+        return eventStream;
+    }
+
+    @Override
+    public void close() {
+        eventStream.close();
+        releaseChunks();
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/Aggregator.java

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+/**
+ * Enum describing the different ways values can be aggregated.
+ */
+enum Aggregator {
+    /**
+     * Dummy to indicate no aggregation is being used.
+     */
+    MISSING(" "),
+    /**
+     * Calculate the average value of all finite numeric values.
+     */
+    AVERAGE("AVG"),
+    /**
+     * Calculate the number of elements, including {@code null}.
+     */
+    COUNT("COUNT"),
+    /**
+     * Calculate the difference between the last and first finite numeric value.
+     */
+    DIFFERENCE("DIFF"),
+    /**
+     * The first value, including {@code null}.
+     */
+    FIRST("FIRST"),
+    /**
+     * The last value, including {@code null}.
+     */
+    LAST("LAST"),
+    /**
+     * Aggregate values into a comma-separated list, including {@code null}.
+     */
+    LIST("LIST"),
+    /**
+     * The highest numeric value.
+     */
+    MAXIMUM("MAX"),
+    /**
+     * The median of all finite numeric values.
+     */
+    MEDIAN("MEDIAN"),
+    /**
+     * The lowest numeric value.
+     */
+    MINIMUM("MIN"),
+    /**
+     * Calculate the 90th percentile of all finite numeric values.
+     */
+    P90("P90"),
+    /**
+     * Calculate the 95th percentile of all finite numeric values.
+     */
+    P95("P95"),
+    /**
+     * Calculate the 99th percentile of all finite numeric values.
+     */
+    P99("P99"),
+    /**
+     * Calculate the 99.9th percentile of all finite numeric values.
+     */
+    P999("P999"),
+    /**
+     * Calculate the standard deviation of all finite numeric values.
+     */
+    STANDARD_DEVIATION("STDEV"),
+    /**
+     * Calculate the sum of all finite numeric values.
+     */
+    SUM("SUM"),
+    /**
+     * Calculates the number of distinct values determined by invoking Object.equals.
+     */
+    UNIQUE("UNIQUE"),
+    /**
+     * The last elements, for an event type, that all share the same end timestamp.
+     */
+    LAST_BATCH("LAST_BATCH");
+
+    public final String name;
+
+    private Aggregator(String name) {
+        this.name = name;
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/Configuration.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.time.Instant;
+
+import jdk.jfr.internal.util.Output;
+
+/**
+ * Holds information on how a query should be rendered.
+ */
+public final class Configuration {
+    public static final int MAX_PREFERRED_WIDTH = 120;
+    public static final int MIN_PREFERRED_WIDTH = 40;
+    public static final int PREFERRED_WIDTH = 80;
+
+    public enum Truncate {
+        BEGINNING, END
+    }
+
+    /**
+     * Where the rendered result should be printed.
+     */
+    public Output output;
+
+    /**
+     * The title of the table or form.
+     * <p>
+     * {@code null) means no title.
+     */
+    public String title;
+
+    /**
+     * Truncation mode if text overflows.
+     * <p>
+     * If truncate is not set, it will be determined by heuristics.
+     */
+    public Truncate truncate;
+
+    /**
+     * Height of table cells.
+     * <p>
+     * If cellHeight is not set, it will be determined by heuristics.
+     */
+    public int cellHeight;
+
+    /**
+     * Width of a table or form.
+     * <p>
+     * If width is not set, it will be determined by heuristics.
+     */
+    public int width;
+
+    /**
+     * If additional information should be printed.
+     */
+    public boolean verbose;
+
+    /**
+     * If symbolic names should be printed for table headers.
+     */
+    public boolean verboseHeaders;
+
+    /**
+     * If the title of the table or form should be printed.
+     */
+    public boolean verboseTitle;
+
+    /**
+     * The start time for the query.
+     * <p>
+     * {@code null) means no start time.
+     */
+    public Instant startTime;
+
+    /**
+     * The end time for the query.
+     * <p>
+     * {@code null) means no end time.
+     */
+    public Instant endTime;
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/Field.java

@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Function;
+
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.jfr.internal.query.Configuration.Truncate;
+import jdk.jfr.internal.query.Query.Grouper;
+import jdk.jfr.internal.query.Query.OrderElement;
+
+/**
+ * Field is the core class of the package.
+ * <p>
+ * It contains all the information related to how a field in a query should be
+ * grouped, sorted, formatted and aggregated.
+ * <p>
+ * Defaults are derived from the metadata available in the event type, for
+ * example, numeric fields are right-aligned in the output, but can also
+ * be set using query clauses COLUMN and FORMAT.
+ * <p>
+ * Settings in {@Configuration} overrides any field setting.
+ */
+final class Field {
+    // The fields to use as data sources, for example, when a
+    // field references multiple event types. First field
+    // is always the same as this field.
+    // (It's confusing, but hard to come up with an another
+    // abstraction that doesn't complicate the implementation.)
+    final List<Field> sourceFields = new ArrayList<>();
+
+    // Source type
+    final FilteredType type;
+
+    // Symbolic name
+    final String name;
+
+    // Index in the fields list
+    int index;
+
+    // Human readable name
+    String label;
+
+    // Function to extract a value from an event object
+    Function<RecordedEvent, Object> valueGetter;
+
+    // Set if the field is part of GROUP BY clause
+    Grouper grouper;
+
+    // Set if the field is part of ORDER BY clause
+    OrderElement orderer;
+
+    // Set if the field is part of an aggregation
+    Aggregator aggregator = Aggregator.MISSING;
+
+    // Height of a table cell
+    int cellHeight = 1;
+
+    // Truncation mode (beginning or end)
+    Truncate truncate;
+
+    // If the value visible
+    boolean visible;
+
+    // Should value be aligned left
+    boolean alignLeft;
+
+    // Should value be normalized between 0.0 and 1.0
+    boolean normalized;
+
+    // Should column be sorted textually
+    boolean lexicalSort;
+
+    // A percentage value
+    boolean percentage;
+
+    // A frequency value
+    boolean frequency;
+
+    // A memory address
+    boolean memoryAddress;
+
+    // A byte value
+    boolean bytes;
+
+    // A bits value
+    boolean bits;
+
+    // A fractional type (double or float)
+    boolean fractionalType;
+
+    // An integral type (byte, short, int, long)
+    boolean integralType;
+
+    // A java.time.Duration
+    boolean timespan;
+
+    // A java.time.Instant
+    boolean timestamp;
+
+    // Used by LAST_BATCH aggregator
+    Instant last = Instant.EPOCH;
+
+    // The data type, for example, jdk.types.Frame or java.lang.String
+    String dataType;
+
+    // Should not be given additional whitespace if available
+    public boolean fixedWidth;
+
+    // Text to render if value is missing, typically used when value is null
+    public String missingText = "N/A";
+
+    public Field(FilteredType type, String name) {
+        this.type = type;
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return type.getName() + "#" + name;
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/FieldBuilder.java

@@ -0,0 +1,422 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.function.Predicate;
+
+import jdk.jfr.DataAmount;
+import jdk.jfr.EventType;
+import jdk.jfr.Frequency;
+import jdk.jfr.MemoryAddress;
+import jdk.jfr.Percentage;
+import jdk.jfr.Timespan;
+import jdk.jfr.Timestamp;
+import jdk.jfr.ValueDescriptor;
+import jdk.jfr.consumer.RecordedClass;
+import jdk.jfr.consumer.RecordedClassLoader;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.jfr.consumer.RecordedFrame;
+import jdk.jfr.consumer.RecordedStackTrace;
+
+/**
+ * This is a helper class to QueryResolver. It handles the creation of fields
+ * and their default configuration.
+ * <p>
+ * The class applies heuristics to decide how values should be formatted,
+ * and labeled.
+ */
+final class FieldBuilder {
+    private static final Set<String> KNOWN_TYPES = createKnownTypes();
+    private final List<EventType> eventTypes;
+    private final ValueDescriptor descriptor;
+    private final Field field;
+    private final String fieldName;
+
+    public FieldBuilder(List<EventType> eventTypes, FilteredType type, String fieldName) {
+        this.eventTypes = eventTypes;
+        this.descriptor = type.getField(fieldName);
+        this.field = new Field(type, fieldName);
+        this.fieldName = fieldName;
+    }
+
+    public List<Field> build() {
+        if (configureSyntheticFields()) {
+            field.fixedWidth = false;
+            return List.of(field);
+        }
+
+        if (descriptor != null) {
+            field.fixedWidth = !descriptor.getTypeName().equals("java.lang.String");
+            field.dataType = descriptor.getTypeName();
+            field.label = makeLabel(descriptor, hasDuration());
+            field.alignLeft = true;
+            field.valueGetter = valueGetter(field.name);
+
+            configureNumericTypes();
+            configureTime();
+            configurePercentage();
+            configureDataAmount();
+            configureFrequency();
+            configureMemoryAddress();
+            configureKnownType();
+            return List.of(field);
+        }
+        return List.of();
+    }
+
+    private static Function<RecordedEvent, Object> valueGetter(String name) {
+        return event -> {
+            try {
+                return event.getValue(name);
+            } catch (NullPointerException e) {
+                // This can happen when accessing a nested structure
+                // that is null, for example root.referrer
+                return null;
+            }
+        };
+    }
+
+    private boolean hasDuration() {
+        return field.type.getField("duration") != null;
+    }
+
+    private boolean configureSyntheticFields() {
+        if (fieldName.equals("stackTrace.topApplicationFrame")) {
+            configureTopApplicationFrameField();
+            return true;
+        }
+        if (fieldName.equals("stackTrace.notInit")) {
+            configureNotInitFrameField();
+            return true;
+        }
+
+        if (fieldName.equals("stackTrace.topFrame")) {
+            configureTopFrameField();
+            return true;
+        }
+        if (fieldName.equals("id") && field.type.getName().equals("jdk.ActiveSetting")) {
+            configureEventTypeIdField();
+            return true;
+        }
+        if (fieldName.equals("eventType.label")) {
+            configureEventType(e -> e.getEventType().getLabel());
+            return true;
+        }
+        if (fieldName.equals("eventType.name")) {
+            configureEventType(e -> e.getEventType().getName());
+            return true;
+        }
+        return false;
+    }
+
+    private void configureEventTypeIdField() {
+        Map<Long, String> eventTypes = createEventTypeLookup();
+        field.alignLeft = true;
+        field.label = "Event Type";
+        field.dataType = String.class.getName();
+        field.valueGetter = event -> eventTypes.get(event.getLong("id"));
+        field.lexicalSort = true;
+        field.integralType = false;
+    }
+
+    private Map<Long, String> createEventTypeLookup() {
+        Map<Long, String> map = new HashMap<>();
+        for (EventType eventType : eventTypes) {
+            String label = eventType.getLabel();
+            if (label == null) {
+                label = eventType.getName();
+            }
+            map.put(eventType.getId(), label);
+        }
+        return map;
+    }
+
+    private void configureTopFrameField() {
+        field.alignLeft = true;
+        field.label = "Method";
+        field.dataType = "jdk.types.Method";
+        field.valueGetter = e -> {
+            RecordedStackTrace t = e.getStackTrace();
+            return t != null ? t.getFrames().getFirst() : null;
+        };
+        field.lexicalSort = true;
+    }
+
+    private void configureCustomFrame(Predicate<RecordedFrame> condition) {
+        field.alignLeft = true;
+        field.dataType = "jdk.types.Frame";
+        field.label = "Method";
+        field.lexicalSort = true;
+        field.valueGetter = e -> {
+            RecordedStackTrace t = e.getStackTrace();
+            if (t != null) {
+                for (RecordedFrame f : t.getFrames()) {
+                    if (f.isJavaFrame()) {
+                        if (condition.test(f)) {
+                            return f;
+                        }
+                    }
+                }
+            }
+            return null;
+        };
+    }
+
+    private void configureNotInitFrameField() {
+        configureCustomFrame(frame -> {
+            return !frame.getMethod().getName().equals("<init>");
+        });
+    }
+
+    private void configureTopApplicationFrameField() {
+        configureCustomFrame(frame -> {
+            RecordedClass cl = frame.getMethod().getType();
+            RecordedClassLoader classLoader = cl.getClassLoader();
+            return classLoader != null && !"bootstrap".equals(classLoader.getName());
+        });
+    }
+
+    private void configureEventType(Function<RecordedEvent, Object> retriever) {
+        field.alignLeft = true;
+        field.dataType = String.class.getName();
+        field.label = "Event Type";
+        field.valueGetter = retriever;
+        field.lexicalSort = true;
+    }
+
+    private static String makeLabel(ValueDescriptor v, boolean hasDuration) {
+        String label = v.getLabel();
+        if (label == null) {
+            return v.getName();
+        }
+        String name = v.getName();
+        if (name.equals("gcId")) {
+            return "GC ID";
+        }
+        if (name.equals("compilerId")) {
+            return "Compiler ID";
+        }
+        if (name.equals("startTime") && !hasDuration) {
+                return "Time";
+        }
+        return label;
+    }
+
+    private void configureTime() {
+        Timestamp timestamp = descriptor.getAnnotation(Timestamp.class);
+        if (timestamp != null) {
+            field.alignLeft = true;
+            field.dataType = Instant.class.getName();
+            field.timestamp = true;
+            field.valueGetter = e -> e.getInstant(fieldName);
+        }
+        Timespan timespan = descriptor.getAnnotation(Timespan.class);
+        if (timespan != null) {
+            field.alignLeft = false;
+            field.dataType = Duration.class.getName();
+            field.timespan = true;
+            field.valueGetter = e -> e.getDuration(fieldName);
+        }
+    }
+
+    private void configureNumericTypes() {
+        switch (descriptor.getTypeName()) {
+        case "int":
+        case "long":
+        case "short":
+        case "byte":
+            field.integralType = true;
+            field.alignLeft = false;
+            break;
+        case "float":
+        case "double":
+            field.fractionalType = true;
+            field.alignLeft = false;
+            break;
+        case "boolean":
+            field.alignLeft = false;
+            break;
+        }
+    }
+
+    private void configureKnownType() {
+        String type = descriptor.getTypeName();
+        if (KNOWN_TYPES.contains(type)) {
+            field.lexicalSort = true;
+            field.fixedWidth = false;
+        }
+    }
+
+    private void configureMemoryAddress() {
+        MemoryAddress memoryAddress = descriptor.getAnnotation(MemoryAddress.class);
+        if (memoryAddress != null) {
+            field.memoryAddress = true;
+            field.alignLeft = true;
+        }
+    }
+
+    private void configureFrequency() {
+        if (descriptor.getAnnotation(Frequency.class) != null) {
+            field.frequency = true;
+        }
+    }
+
+    private void configureDataAmount() {
+        DataAmount dataAmount = descriptor.getAnnotation(DataAmount.class);
+        if (dataAmount != null) {
+            if (DataAmount.BITS.equals(dataAmount.value())) {
+                field.bits = true;
+            }
+            if (DataAmount.BYTES.equals(dataAmount.value())) {
+                field.bytes = true;
+            }
+        }
+    }
+
+    private void configurePercentage() {
+        Percentage percentage = descriptor.getAnnotation(Percentage.class);
+        if (percentage != null) {
+            field.percentage = true;
+        }
+    }
+
+    // Fields created with "SELECT * FROM ..." queries
+    public static List<Field> createWildcardFields(List<EventType> eventTypes, List<FilteredType> types) {
+        List<Field> result = new ArrayList<>();
+        for (FilteredType type : types) {
+            result.addAll(createWildcardFields(eventTypes, type));
+        }
+        return result;
+    }
+
+    private static List<Field> createWildcardFields(List<EventType> eventTypes, FilteredType type) {
+        record WildcardElement(String name, String label, ValueDescriptor field) {
+        }
+
+        var visited = new HashSet<ValueDescriptor>();
+        var stack = new ArrayDeque<WildcardElement>();
+        var wildcardElements = new ArrayList<WildcardElement>();
+
+        for (ValueDescriptor field : type.getFields().reversed()) {
+            stack.push(new WildcardElement(field.getName(), makeLabel(field, hasDuration(type)), field));
+        }
+        while (!stack.isEmpty()) {
+            var we = stack.pop();
+            if (!visited.contains(we.field)) {
+                visited.add(we.field);
+                var subFields = we.field().getFields().reversed();
+                if (!subFields.isEmpty() && !KNOWN_TYPES.contains(we.field().getTypeName())) {
+                    for (ValueDescriptor subField : subFields) {
+                        String n = we.name + "." + subField.getName();
+                        String l = we.label + " : " + makeLabel(subField, false);
+                        if (stack.size() < 2) { // Limit depth to 2
+                            stack.push(new WildcardElement(n, l, subField));
+                        }
+                    }
+                } else {
+                    wildcardElements.add(we);
+                }
+            }
+        }
+        List<Field> result = new ArrayList<>();
+        for (WildcardElement we : wildcardElements) {
+            FieldBuilder fb = new FieldBuilder(eventTypes, type, we.name());
+            Field field = fb.build().getFirst();
+            field.label = we.label;
+            field.index = result.size();
+            field.visible = true;
+            field.sourceFields.add(field);
+            result.add(field);
+        }
+        return result;
+    }
+
+    private static boolean hasDuration(FilteredType type) {
+        return type.getField("duration") != null;
+    }
+
+    public static void configureAggregator(Field field) {
+        Aggregator aggregator = field.aggregator;
+        if (aggregator == Aggregator.COUNT || aggregator == Aggregator.UNIQUE) {
+            field.integralType = true;
+            field.timestamp = false;
+            field.timespan = false;
+            field.fractionalType = false;
+            field.bytes = false;
+            field.bits = false;
+            field.frequency = false;
+            field.memoryAddress = false;
+            field.percentage = false;
+            field.alignLeft = false;
+            field.lexicalSort = false;
+        }
+        if (aggregator == Aggregator.LIST) {
+            field.alignLeft = true;
+            field.lexicalSort = true;
+        }
+        field.label = switch (aggregator) {
+            case COUNT -> "Count";
+            case AVERAGE -> "Avg. " + field.label;
+            case FIRST, LAST, LAST_BATCH -> field.label;
+            case MAXIMUM -> "Max. " + field.label;
+            case MINIMUM -> "Min. " + field.label;
+            case SUM -> "Total " + field.label;
+            case UNIQUE -> "Unique Count " + field.label;
+            case LIST -> field.label + "s";
+            case MISSING -> field.label;
+            case DIFFERENCE -> "Difference " + field.label;
+            case MEDIAN -> "Median " + field.label;
+            case P90 -> "P90 " + field.label;
+            case P95 -> "P95 " + field.label;
+            case P99 -> "P99 " + field.label;
+            case P999 -> "P99.9 " + field.label;
+            case STANDARD_DEVIATION -> "Std. Dev. " + field.label;
+        };
+    }
+
+    private static Set<String> createKnownTypes() {
+        Set<String> set = new HashSet<>();
+        set.add(String.class.getName());
+        set.add(Thread.class.getName());
+        set.add(Class.class.getName());
+        set.add("jdk.types.ThreadGroup");
+        set.add("jdk.types.ClassLoader");
+        set.add("jdk.types.Method");
+        set.add("jdk.types.StackFrame");
+        set.add("jdk.types.StackTrace");
+        return set;
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/FieldFormatter.java

@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+
+import jdk.jfr.consumer.RecordedClass;
+import jdk.jfr.consumer.RecordedClassLoader;
+import jdk.jfr.consumer.RecordedFrame;
+import jdk.jfr.consumer.RecordedMethod;
+import jdk.jfr.consumer.RecordedStackTrace;
+import jdk.jfr.consumer.RecordedThread;
+import jdk.jfr.consumer.RecordedThreadGroup;
+import jdk.jfr.internal.util.ValueFormatter;
+
+public class FieldFormatter {
+
+    public static String formatCompact(Field field, Object object) {
+        return format(field, object, true);
+    }
+
+    public static String format(Field field, Object object) {
+        return format(field, object, false);
+    }
+
+    private static String format(Field field, Object object, boolean compact) {
+        if (object == null) {
+            return field.missingText;
+        }
+        if (object instanceof String s) {
+            return stripFormatting(s);
+        }
+        if (object instanceof Double d) {
+            if (Double.isNaN(d) || d == Double.NEGATIVE_INFINITY) {
+                return field.missingText;
+            }
+        }
+        if (object instanceof Float f) {
+            if (Float.isNaN(f) || f == Float.NEGATIVE_INFINITY) {
+                return field.missingText;
+            }
+        }
+        if (object instanceof Long l && l == Long.MIN_VALUE) {
+            return field.missingText;
+        }
+        if (object instanceof Integer i && i == Integer.MIN_VALUE) {
+            return field.missingText;
+        }
+
+        if (object instanceof RecordedThread t) {
+            if (t.getJavaThreadId() > 0) {
+                return t.getJavaName();
+            } else {
+                return t.getOSName();
+            }
+        }
+        if (object instanceof RecordedClassLoader cl) {
+            return format(field, cl.getType(), compact);
+        }
+        if (object instanceof RecordedStackTrace st) {
+            return format(field, st.getFrames().getFirst(), compact);
+        }
+        if (object instanceof RecordedThreadGroup tg) {
+            return tg.getName();
+        }
+        if (object instanceof RecordedMethod m) {
+            return ValueFormatter.formatMethod(m, compact);
+        }
+        if (object instanceof RecordedClass clazz) {
+            String text = ValueFormatter.formatClass(clazz);
+            if (compact) {
+                return text.substring(text.lastIndexOf(".") + 1);
+            }
+            return text;
+        }
+        if (object instanceof RecordedFrame f) {
+            if (f.isJavaFrame()) {
+                return format(field, f.getMethod(), compact);
+            }
+            return "<unknown>";
+        }
+        if (object instanceof Duration d) {
+            if (d.getSeconds() == Long.MIN_VALUE && d.getNano() == 0) {
+                return field.missingText;
+            }
+            if (d.equals(ChronoUnit.FOREVER.getDuration())) {
+                return "Indefinite";
+            }
+            return ValueFormatter.formatDuration(d);
+        }
+        if (object instanceof Instant instant) {
+            return ValueFormatter.formatTimestamp(instant);
+        }
+        if (field.percentage) {
+            if (object instanceof Number n) {
+                double d = n.doubleValue();
+                return String.format("%.2f", d * 100) + "%";
+            }
+        }
+        if (field.bits || field.bytes) {
+            if (object instanceof Number n) {
+                long amount = n.longValue();
+                if (field.frequency) {
+                    if (field.bytes) {
+                        return ValueFormatter.formatBytesPerSecond(amount);
+                    }
+                    if (field.bits) {
+                        return ValueFormatter.formatBitsPerSecond(amount);
+                    }
+                } else {
+                    if (field.bytes) {
+                        return ValueFormatter.formatBytes(amount);
+                    }
+                    if (field.bits) {
+                        return ValueFormatter.formatBits(amount);
+                    }
+                }
+            }
+        }
+        if (field.memoryAddress) {
+            if (object instanceof Number n) {
+                long d = n.longValue();
+                return String.format("0x%08X", d);
+            }
+        }
+        if (field.frequency) {
+            if (object instanceof Number) {
+                return object + " Hz";
+            }
+        }
+        if (object instanceof Number number) {
+            return ValueFormatter.formatNumber(number);
+        }
+        return object.toString();
+    }
+
+    private static String stripFormatting(String text) {
+        if (!hasFormatting(text)) {
+            return text; // Fast path to avoid allocation
+        }
+        StringBuilder sb = new StringBuilder(text.length());
+        for (int i = 0; i < text.length(); i++) {
+            char c = text.charAt(i);
+            sb.append(isFormatting(c) ? ' ' : c);
+        }
+        return sb.toString();
+    }
+
+    private static boolean hasFormatting(String s) {
+        for (int i = 0; i < s.length(); i++) {
+            if (isFormatting(s.charAt(i))) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static boolean isFormatting(char c) {
+        return c == '\n' || c == '\r' || c == '\t';
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/FilteredType.java

@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+import jdk.jfr.EventType;
+import jdk.jfr.Experimental;
+import jdk.jfr.ValueDescriptor;
+import jdk.jfr.internal.Utils;
+
+/**
+ * Type referenced in a FROM-clause.
+ * <p>
+ * If the query has a WHEN clause, the available events for the event type
+ * is restricted by a list of filter conditions.
+ */
+final class FilteredType {
+    public record Filter (Field field, String value) {
+
+        @Override
+        public int hashCode() {
+            return field.name.hashCode() + value.hashCode();
+        }
+
+        @Override
+        public boolean equals(Object object) {
+            if (object instanceof Filter that) {
+                return this.field.name.equals(that.field.name) && Objects.equals(this.value, that.value);
+            }
+            return false;
+        }
+    }
+
+    private final List<Filter> filters = new ArrayList<>();
+    private final EventType eventType;
+    private final String simpleName;
+
+    public FilteredType(EventType type) {
+        this.eventType = type;
+        this.simpleName = Utils.makeSimpleName(type);
+    }
+
+    public boolean isExperimental() {
+        return eventType.getAnnotation(Experimental.class) != null;
+    }
+
+    public String getName() {
+        return eventType.getName();
+    }
+
+    public String getLabel() {
+        return eventType.getLabel();
+    }
+
+    public String getSimpleName() {
+        return simpleName;
+    }
+
+    public void addFilter(Filter filter) {
+        filters.add(filter);
+    }
+
+    public List<Filter> getFilters() {
+        return filters;
+    }
+
+    public ValueDescriptor getField(String name) {
+        return eventType.getField(name);
+    }
+
+    public List<ValueDescriptor> getFields() {
+        return eventType.getFields();
+    }
+
+    @Override
+    public int hashCode() {
+        return Long.hashCode(eventType.getId()) + filters.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (object instanceof FilteredType that) {
+            return that.eventType.getId() == this.eventType.getId()
+                && that.filters.equals(this.filters);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append(getName());
+        sb.append(" ");
+        for (Filter condition : filters) {
+            sb.append(condition.field());
+            sb.append(" = ");
+            sb.append(condition.value());
+            sb.append(" ");
+        }
+        return sb.toString();
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/FormRenderer.java

@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+
+/**
+ * Class responsible for printing and formatting the contents of the first row in a table,
+ * as a form.
+ */
+import jdk.jfr.internal.util.Output;
+
+final class FormRenderer {
+    private static final String LABEL_SUFFIX = ": ";
+    private final Table table;
+    private final Output out;
+    private final Configuration configuration;
+    private final int width;
+
+    public FormRenderer(Configuration configuration, Table table) {
+        this.table = table;
+        this.out = configuration.output;
+        this.configuration = configuration;
+        this.width = determineWidth(configuration);
+    }
+
+    private static int determineWidth(Configuration configuration) {
+        if (configuration.width == 0) {
+            return Configuration.PREFERRED_WIDTH;
+        } else {
+            return configuration.width;
+        }
+    }
+
+    public void render() {
+        if (table.isEmpty()) {
+            if (configuration.title != null) {
+                out.println();
+                out.println("No events found for '" + configuration.title +"'.");
+            }
+            return;
+        }
+
+        int maxWidth = 0;
+        for (Field field : table.getFields()) {
+            String label = field.label + LABEL_SUFFIX;
+            maxWidth = Math.max(label.length() + 1, maxWidth);
+        }
+        out.println();
+        if (maxWidth + 2 > width) {
+            out.println("Columns are too wide to fit width " + configuration.width + ".");
+            return;
+        }
+        if (configuration.title != null) {
+            out.println(configuration.title);
+            out.println("-".repeat(configuration.title.length()));
+        }
+        if (table.isEmpty()) {
+            return;
+        }
+        for (Field field : table.getFields()) {
+            if (field.visible) {
+                out.println();
+                renderField(field);
+            }
+        }
+    }
+
+    private void renderField(Field field) {
+        Row row = table.getRows().getFirst();
+        String label = field.label + LABEL_SUFFIX;
+        Object value = row.getValue(field.index);
+        String text = FieldFormatter.format(field, value);
+        boolean newLine = false;
+        out.print(label);
+        long p = width - label.length() - 1;
+        for (int i = 0; i < text.length(); i++) {
+            if (newLine) {
+                out.print(" ".repeat(label.length()));
+                newLine = false;
+            }
+            out.print(text.charAt(i));
+            if (i % p == p - 1) {
+                newLine = true;
+                out.println();
+            }
+        }
+        out.println();
+    }
+
+    public int getWidth() {
+        return width;
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/Function.java

@@ -0,0 +1,662 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.StringJoiner;
+
+abstract class Function {
+
+    public abstract void add(Object value);
+
+    public abstract Object result();
+
+    public static Function create(Field field) {
+        Aggregator aggregator = field.aggregator;
+
+        if (field.grouper != null || aggregator == Aggregator.MISSING) {
+            return new FirstNonNull();
+        }
+        if (aggregator == Aggregator.LIST) {
+            return new List();
+        }
+
+        if (aggregator == Aggregator.DIFFERENCE) {
+            if (field.timestamp) {
+                return new TimeDifference();
+            } else {
+                return new Difference();
+            }
+        }
+
+        if (aggregator == Aggregator.STANDARD_DEVIATION) {
+            if (field.timespan) {
+                return new TimespanFunction(new StandardDeviation());
+            } else {
+                return new StandardDeviation();
+            }
+        }
+
+        if (aggregator == Aggregator.MEDIAN) {
+            if (field.timespan) {
+                return new TimespanFunction(new Median());
+            } else {
+                return new Median();
+            }
+        }
+
+        if (aggregator == Aggregator.P90) {
+            return createPercentile(field, 0.95);
+        }
+
+        if (aggregator == Aggregator.P95) {
+            return createPercentile(field, 0.95);
+
+        }
+        if (aggregator == Aggregator.P99) {
+            return createPercentile(field, 0.99);
+        }
+        if (aggregator == Aggregator.P999) {
+            return createPercentile(field, 0.9999);
+        }
+        if (aggregator == Aggregator.MAXIMUM) {
+            return new Maximum();
+        }
+        if (aggregator == Aggregator.MINIMUM) {
+            return new Minimum();
+        }
+        if (aggregator == Aggregator.SUM) {
+            if (field.timespan) {
+                return new SumDuration();
+            }
+            if (field.fractionalType) {
+                return new SumDouble();
+            }
+            if (field.integralType) {
+                return new SumLong();
+            }
+        }
+
+        if (aggregator == Aggregator.FIRST) {
+            return new First();
+        }
+        if (aggregator == Aggregator.LAST_BATCH) {
+            return new LastBatch(field);
+        }
+        if (aggregator == Aggregator.LAST) {
+            return new Last();
+        }
+        if (aggregator == Aggregator.AVERAGE) {
+            if (field.timespan) {
+                return new AverageDuration();
+            } else {
+                return new Average();
+            }
+        }
+        if (aggregator == Aggregator.COUNT) {
+            return new Count();
+        }
+        if (aggregator == Aggregator.UNIQUE) {
+            return new Unique();
+        }
+        return new Null();
+    }
+
+    // **** AVERAGE ****
+
+    private static final class Average extends Function {
+        private double total;
+        private long count;
+
+        @Override
+        public void add(Object value) {
+            if (value instanceof Number n && Double.isFinite(n.doubleValue())) {
+                total += n.doubleValue();
+                count++;
+            }
+        }
+
+        @Override
+        public Object result() {
+            if (count != 0) {
+                return total / count;
+            } else {
+                return null;
+            }
+        }
+    }
+
+    private static final class AverageDuration extends Function {
+        private long seconds;
+        private long nanos;
+        private int count;
+
+        @Override
+        public void add(Object value) {
+            if (value instanceof Duration duration) {
+                seconds += duration.getSeconds();
+                nanos += duration.getNano();
+                count++;
+            }
+        }
+
+        @Override
+        public Object result() {
+            if (count != 0) {
+                long s = seconds / count;
+                long n = nanos / count;
+                return Duration.ofSeconds(s, n);
+            } else {
+                return null;
+            }
+        }
+    }
+
+    // **** COUNT ****
+
+    private static final class Count extends Function {
+        private long count = 0;
+
+        @Override
+        public void add(Object value) {
+            count++;
+        }
+
+        @Override
+        public Object result() {
+            return count;
+        }
+    }
+
+    // **** FIRST ****
+
+    private static final class First extends Function {
+        private static Object firstObject = new Object();
+        private Object first = firstObject;
+
+        @Override
+        public void add(Object value) {
+            if (first == firstObject) {
+                first = value;
+            }
+        }
+
+        @Override
+        public Object result() {
+            return first == firstObject ? null : first;
+        }
+    }
+
+    // **** LAST ****
+
+    private static final class Last extends Function {
+        private static Object lastObject = new Object();
+        private Object last = lastObject;
+
+        @Override
+        public void add(Object value) {
+            last = value;
+        }
+
+        @Override
+        public Object result() {
+            return last == lastObject ? null : last;
+        }
+    }
+
+    private static final class FirstNonNull extends Function {
+        private Object first;
+
+        @Override
+        public void add(Object value) {
+            if (value == null) {
+                return;
+            }
+            first = value;
+        }
+
+        @Override
+        public Object result() {
+            return first;
+        }
+    }
+
+    // **** MAXIMUM ****
+
+    @SuppressWarnings("rawtypes")
+    private static final class Maximum extends Function {
+        private Comparable<Comparable> maximum;
+
+        @SuppressWarnings("unchecked")
+        @Override
+        public void add(Object value) {
+            if (value instanceof Comparable comparable) {
+                if (maximum == null) {
+                    maximum = comparable;
+                    return;
+                }
+                if (comparable.compareTo(maximum) > 0) {
+                    maximum = comparable;
+                }
+            }
+        }
+
+        @Override
+        public Object result() {
+            if (maximum == null) {
+                System.out.println("Why");
+            }
+            return maximum;
+        }
+    }
+
+    // **** MINIMUM ****
+
+    @SuppressWarnings("rawtypes")
+    private static final class Minimum extends Function {
+        private Comparable<Comparable> minimum;
+
+        @SuppressWarnings("unchecked")
+        @Override
+        public void add(Object value) {
+            if (value instanceof Comparable comparable) {
+                if (minimum == null) {
+                    minimum = comparable;
+                    return;
+                }
+                if (comparable.compareTo(minimum) < 0) {
+                    minimum = comparable;
+                }
+            }
+        }
+
+        @Override
+        public Object result() {
+            return minimum;
+        }
+    }
+
+    // *** NULL ****
+
+    private static final class Null extends Function {
+        @Override
+        public void add(Object value) {
+        }
+
+        @Override
+        public Object result() {
+            return null;
+        }
+    }
+
+    // **** SUM ****
+
+    private static final class SumDouble extends Function {
+        private boolean hasValue = false;
+        private double sum = 0;
+
+        @Override
+        public void add(Object value) {
+            if (value instanceof Number n && Double.isFinite(n.doubleValue())) {
+                sum += n.doubleValue();
+                hasValue = true;
+            }
+        }
+
+        @Override
+        public Object result() {
+            return hasValue ? sum : null;
+        }
+    }
+
+    private static final class SumDuration extends Function {
+        private long seconds;
+        private long nanos;
+        private boolean hasValue;
+
+        @Override
+        public void add(Object value) {
+            if (value instanceof Duration n) {
+                seconds += n.getSeconds();
+                nanos += n.getNano();
+                hasValue = true;
+            }
+        }
+
+        @Override
+        public Object result() {
+            return hasValue ? Duration.ofSeconds(seconds, nanos) : null;
+        }
+    }
+
+    private static final class SumLong extends Function {
+        private boolean hasValue = false;
+        private long sum = 0;
+
+        @Override
+        public void add(Object value) {
+            if (value instanceof Number n) {
+                sum += n.longValue();
+                hasValue = true;
+            }
+        }
+
+        @Override
+        public Object result() {
+            return hasValue ? sum : null;
+        }
+    }
+
+    // **** UNIQUE ****
+
+    private static final class Unique extends Function {
+        private final Set<Object> unique = new HashSet<>();
+
+        @Override
+        public void add(Object value) {
+            unique.add(value);
+        }
+
+        @Override
+        public Object result() {
+            return unique.size();
+        }
+    }
+
+    // **** LIST ****
+
+    private static final class List extends Function {
+        private final ArrayList<Object> list = new ArrayList<>();
+
+        @Override
+        public void add(Object value) {
+            list.add(value);
+        }
+
+        @Override
+        public Object result() {
+            StringJoiner sj = new StringJoiner(", ");
+            for (Object object : list) {
+                sj.add(String.valueOf(object));
+            }
+            return sj.toString();
+        }
+    }
+
+    // **** DIFF ****
+
+    private static final class Difference extends Function {
+        private Number first;
+        private Number last;
+
+        @Override
+        public void add(Object value) {
+            if (value instanceof Number number && Double.isFinite(number.doubleValue())) {
+                if (first == null) {
+                    first = number;
+                }
+                last = number;
+            }
+        }
+
+        @Override
+        public Object result() {
+            if (last == null) {
+                return null;
+            }
+            if (isIntegral(first) && isIntegral(last)) {
+                return last.longValue() - first.longValue();
+            }
+            if (first instanceof Float f && last instanceof Float l) {
+                return l - f;
+            }
+            return last.doubleValue() - first.doubleValue();
+        }
+
+        private boolean isIntegral(Number number) {
+            if ((number instanceof Long) || (number instanceof Integer) || (number instanceof Short)
+                    || (number instanceof Byte)) {
+                return true;
+            }
+            return false;
+        }
+    }
+    private static final class TimeDifference extends Function {
+        private Instant first;
+        private Instant last;
+
+        @Override
+        public void add(Object value) {
+            if (value instanceof Instant instant) {
+                if (first == null) {
+                    first = instant;
+                    return;
+                }
+                last = instant;
+            }
+        }
+
+        @Override
+        public Object result() {
+            if (first == null) {
+                return null;
+            }
+            if (last == null) {
+                return ChronoUnit.FOREVER.getDuration();
+            }
+            return Duration.between(first, last);
+        }
+    }
+
+    @SuppressWarnings("rawtypes")
+    private static final class Median extends Function {
+        private final java.util.List<Comparable> comparables = new ArrayList<>();
+
+        @Override
+        public void add(Object value) {
+            if (value instanceof Number && value instanceof Comparable c) {
+                comparables.add(c);
+            }
+        }
+
+        @Override
+        @SuppressWarnings("unchecked")
+        public Object result() {
+            if (comparables.isEmpty()) {
+                return null;
+            }
+            if (comparables.size() == 1) {
+                return comparables.getFirst();
+            }
+            comparables.sort(Comparator.naturalOrder());
+            if (comparables.size() % 2 == 1) {
+                return comparables.get(comparables.size() / 2);
+            }
+            Number a = (Number) comparables.get(comparables.size() / 2 - 1);
+            Number b = (Number) comparables.get(comparables.size() / 2);
+            return (a.doubleValue() + b.doubleValue()) / 2;
+        }
+    }
+
+    // **** PERCENTILE ****
+    private static Function createPercentile(Field field, double percentile) {
+        Percentile p = new Percentile(percentile);
+        if (field.timespan) {
+            return new TimespanFunction(p);
+        } else {
+            return p;
+        }
+    }
+
+    private static final class TimespanFunction extends Function {
+        private final Function function;
+
+        TimespanFunction(Function function) {
+            this.function = function;
+        }
+
+        @Override
+        public void add(Object value) {
+            if (value instanceof Duration duration) {
+                long nanos = 1_000_000_000L * duration.getSeconds() + duration.getNano();
+                function.add(nanos);
+            }
+        }
+
+        @Override
+        public Object result() {
+            Object object = function.result();
+            if (object instanceof Number nanos) {
+                return Duration.ofNanos(nanos.longValue());
+            }
+            return null;
+        }
+    }
+    private static final class Percentile extends Function {
+        private final double percentile;
+        private final java.util.List<Number> numbers = new ArrayList<>();
+
+        Percentile(double percentile) {
+            this.percentile = percentile;
+        }
+
+        @Override
+        public void add(Object value) {
+            if (value instanceof Number number) {
+                if (Double.isFinite(number.doubleValue())) {
+                    numbers.add(number);
+                }
+            }
+        }
+
+        @Override
+        public Object result() {
+            if (numbers.isEmpty()) {
+                return null;
+            }
+            if (numbers.size() == 1) {
+                return numbers.getFirst();
+            }
+            numbers.sort((n1, n2) -> Double.compare(n1.doubleValue(), n2.doubleValue()));
+            int size = numbers.size();
+            // Use size + 1 so range is stretched out for interpolation
+            // For example with percentile 50%
+            // size |  valueIndex |  valueNextindex | fraction
+            //   2         0               1            0.50
+            //   3         1               2             0.0
+            //   4         1               2            0.50
+            //   5         2               3             0.0
+            //   6         2               3            0.50
+            double doubleIndex = (size + 1) * percentile;
+            int valueIndex = (int) doubleIndex - 1;
+            int valueNextIndex = (int) doubleIndex;
+            double fraction = doubleIndex - valueIndex;
+
+            if (valueIndex < 0) {
+                return numbers.getFirst();
+            }
+            if (valueNextIndex >= size) {
+                return numbers.getLast();
+            }
+            double a = numbers.get(valueIndex).doubleValue();
+            double b = numbers.get(valueNextIndex).doubleValue();
+            return a + fraction * (b - a);
+        }
+    }
+
+    // **** STANDARD DEVIATION ****
+
+    private static final class StandardDeviation extends Function {
+        private final java.util.List<Number> values = new ArrayList<>();
+
+        @Override
+        public void add(Object value) {
+            if (value instanceof Number n && Double.isFinite(n.doubleValue())) {
+                values.add(n);
+            }
+        }
+
+        @Override
+        public Object result() {
+            if (values.size() > 0) {
+                long N = values.size();
+                double average = sum() / N;
+                double sum = 0;
+                for (Number number : values) {
+                    double diff = number.doubleValue() - average;
+                    sum = sum + (diff * diff);
+                }
+                return Math.sqrt(sum / N);
+            }
+            return null;
+        }
+
+        private double sum() {
+            double sum = 0;
+            for (Number number : values) {
+                sum += number.doubleValue();
+            }
+            return sum ;
+        }
+    }
+
+    public static final class LastBatch extends Function {
+        private final Field field;
+        private final Last last = new Last();
+        private Instant timestamp;
+
+        public LastBatch(Field field) {
+            this.field = field;
+        }
+
+        @Override
+        public void add(Object value) {
+            last.add(value);
+        }
+
+        @Override
+        public Object result() {
+            return last.result();
+        }
+
+        public void setTime(Instant timestamp) {
+           this.timestamp = timestamp;
+           field.last = timestamp;
+        }
+
+        public boolean valid() {
+            if (timestamp != null) {
+                return timestamp.equals(field.last);
+            }
+            return true;
+        }
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/Histogram.java

@@ -0,0 +1,214 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+
+import jdk.jfr.consumer.RecordedClass;
+import jdk.jfr.consumer.RecordedClassLoader;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.jfr.consumer.RecordedFrame;
+import jdk.jfr.consumer.RecordedMethod;
+import jdk.jfr.consumer.RecordedObject;
+import jdk.jfr.consumer.RecordedStackTrace;
+import jdk.jfr.consumer.RecordedThread;
+import jdk.jfr.consumer.RecordedThreadGroup;
+import jdk.jfr.internal.query.Function.LastBatch;
+
+/**
+ * Class responsible for aggregating values
+ */
+final class Histogram {
+    private static final class LookupKey {
+        private Object keys;
+
+        @SuppressWarnings({ "unchecked", "rawtypes" })
+        public void add(Object o) {
+            // One key, fast path
+            if (keys == null) {
+                keys = o;
+                return;
+            }
+            // Three or more keys
+            if (keys instanceof Set set) {
+                set.add(o);
+                return;
+            }
+            // Two keys
+            Set<Object> set = HashSet.newHashSet(2);
+            set.add(keys);
+            set.add(o);
+            keys = set;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hashCode(keys);
+        }
+
+        @Override
+        public boolean equals(Object object) {
+            if (object instanceof LookupKey that) {
+                return Objects.deepEquals(that.keys, this.keys);
+            }
+            return false;
+        }
+    }
+
+    private static final class MethodEquality {
+        private final String methodName;
+        private final String descriptor;
+        private final long classId;
+
+        public MethodEquality(RecordedMethod method) {
+            methodName = method.getName();
+            descriptor = method.getDescriptor();
+            classId = method.getType().getId();
+        }
+
+        @Override
+        public int hashCode() {
+            int hash1 = Long.hashCode(classId);
+            int hash2 = methodName.hashCode();
+            int hash3 = descriptor.hashCode();
+            int result = 31 + hash1;
+            result += 31 * result + hash2;
+            result += 31 * result + hash3;
+            return result;
+        }
+
+        @Override
+        public boolean equals(Object object) {
+            if (object instanceof MethodEquality that) {
+                if ((this.classId != that.classId) || !Objects.equals(this.methodName, that.methodName)) {
+                    return false;
+                }
+                return Objects.equals(this.descriptor, that.descriptor);
+            }
+            return false;
+        }
+    }
+
+    private final Map<LookupKey, Function[]> keyFunctionsMap = new HashMap<>();
+    private final List<Field> fields = new ArrayList<>();
+
+    public void addFields(List<Field> fields) {
+        this.fields.addAll(fields);
+    }
+
+    public void add(RecordedEvent e, FilteredType type, List<Field> sourceFields) {
+        LookupKey lk = new LookupKey();
+        final Object[] values = new Object[sourceFields.size()];
+        for (int i = 0; i < values.length; i++) {
+            Field field = sourceFields.get(i);
+            Object value = field.valueGetter.apply(e);
+            values[i] = value;
+            if (field.grouper != null) {
+                lk.add(makeKey(value));
+            }
+        }
+
+        Function[] fs = keyFunctionsMap.computeIfAbsent(lk, k -> createFunctions());
+        for (int i = 0; i < values.length; i++) {
+            Function function = fs[sourceFields.get(i).index];
+            function.add(values[i]);
+            if (function instanceof LastBatch l) {
+                l.setTime(e.getEndTime());
+            }
+        }
+    }
+
+    public List<Row> toRows() {
+        List<Row> rows = new ArrayList<>(keyFunctionsMap.size());
+        for (Function[] functions : keyFunctionsMap.values()) {
+            Row row = new Row(fields.size());
+            boolean valid = true;
+            int index = 0;
+            for (Function f : functions) {
+                if (f instanceof LastBatch last && !last.valid()) {
+                    valid = false;
+                }
+                row.putValue(index++, f.result());
+            }
+            if (valid) {
+                rows.add(row);
+            }
+        }
+        return rows;
+    }
+
+    private Function[] createFunctions() {
+        Function[] functions = new Function[fields.size()];
+        for (int i = 0; i < functions.length; i++) {
+            functions[i] = Function.create(fields.get(i));
+        }
+        return functions;
+    }
+
+    private static Object makeKey(Object object) {
+        if (!(object instanceof RecordedObject)) {
+            return object;
+        }
+        if (object instanceof RecordedMethod method) {
+            return new MethodEquality(method);
+        }
+        if (object instanceof RecordedThread thread) {
+            return thread.getId();
+        }
+        if (object instanceof RecordedClass clazz) {
+            return clazz.getId();
+        }
+        if (object instanceof RecordedFrame frame) {
+            if (frame.isJavaFrame()) {
+                return makeKey(frame.getMethod());
+            }
+            return null;
+        }
+
+        if (object instanceof RecordedStackTrace stackTrace) {
+            List<RecordedFrame> recordedFrames = stackTrace.getFrames();
+            List<Object> frames = new ArrayList<>(recordedFrames.size());
+            for (RecordedFrame frame : recordedFrames) {
+                frames.add(makeKey(frame));
+            }
+            return frames;
+        }
+        if (object instanceof RecordedClassLoader classLoader) {
+            return classLoader.getId();
+        }
+        if (object instanceof RecordedThreadGroup group) {
+            String name = group.getName();
+            String parentName = group.getParent() != null ? group.getParent().getName() : null;
+            return name + ":" + parentName;
+        }
+        return object;
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/Query.java

@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.text.ParseException;
+import java.util.List;
+import java.util.Optional;
+import java.util.StringJoiner;
+import java.util.function.Consumer;
+
+final class Query {
+    enum SortOrder {
+        NONE, ASCENDING, DESCENDING
+    }
+
+    record Source(String name, Optional<String> alias) {
+    }
+
+    record Condition(String field, String value) {
+    }
+
+    record Where(List<Condition> conditions) {
+    }
+
+    record Property(String name, Consumer<Field> style) {
+    }
+
+    record Formatter(List<Property> properties) {
+    }
+
+    record Expression(String name, Optional<String> alias, Aggregator aggregator) {
+    }
+
+    record Grouper(String field) {
+    }
+
+    record OrderElement(String name, SortOrder order) {
+    }
+
+    final List<String> column;
+    final List<Formatter> format;
+    final List<Expression> select;
+    final List<Source> from;
+    final List<Condition> where;
+    final List<Grouper> groupBy;
+    final List<OrderElement> orderBy;
+    final int limit;
+
+    public Query(String text) throws ParseException {
+        try (QueryParser qp = new QueryParser(text)) {
+            column = qp.column();
+            format = qp.format();
+            select = qp.select();
+            from = qp.from();
+            where = qp.where();
+            groupBy = qp.groupBy();
+            orderBy = qp.orderBy();
+            limit = qp.limit();
+        }
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        if (!column.isEmpty()) {
+            StringJoiner sj = new StringJoiner(", ");
+            for (String c : column) {
+                sj.add("'" + c + "'");
+            }
+            sb.append("COLUMN ").append(sj).append(" ");
+        }
+        if (!format.isEmpty()) {
+            StringJoiner sj = new StringJoiner(", ");
+            for (Formatter f : format) {
+                StringJoiner t = new StringJoiner(";");
+                for (Property p : f.properties()) {
+                    t.add(p.name());
+                }
+                sj.add(t.toString());
+            }
+            sb.append("FORMAT ").append(sj).append(" ");
+        }
+        StringJoiner t = new StringJoiner(", ");
+        for (Expression e : select) {
+            StringBuilder w = new StringBuilder();
+            if (e.aggregator() != Aggregator.MISSING) {
+                w.append(e.aggregator().name());
+                w.append("(");
+            }
+            w.append(e.name());
+            if (e.aggregator() != Aggregator.MISSING) {
+                w.append(")");
+            }
+            if (e.alias().isPresent()) {
+                w.append(" AS ");
+                w.append(e.alias().get());
+            }
+            t.add(w.toString());
+        }
+        sb.append("SELECT ")
+          .append(select.isEmpty() ? "*" : t.toString());
+        StringJoiner u = new StringJoiner(", ");
+        for (Source e : from) {
+            String s = e.name();
+            if (e.alias().isPresent()) {
+                s += " AS " + e.alias().get();
+            }
+            u.add(s);
+        }
+        sb.append(" FROM ").append(u);
+        if (!where.isEmpty()) {
+            StringJoiner sj = new StringJoiner(" AND");
+            for (Condition c : where) {
+                sj.add(" " + c.field() + " = '" + c.value() + "'");
+            }
+            sb.append(" WHERE").append(sj);
+        }
+
+        if (!groupBy.isEmpty()) {
+            StringJoiner sj = new StringJoiner(", ");
+            for (Grouper g : groupBy) {
+                sj.add(g.field());
+            }
+            sb.append(" GROUP BY ").append(sj);
+        }
+        if (!orderBy.isEmpty()) {
+            StringJoiner sj = new StringJoiner(", ");
+            for (OrderElement e : orderBy) {
+                String name = e.name();
+                if (e.order() == SortOrder.ASCENDING) {
+                    name += " ASC";
+                }
+                if (e.order() == SortOrder.DESCENDING) {
+                    name += " DESC";
+                }
+                sj.add(name);
+            }
+            sb.append(" ORDER BY ").append(sj);
+        }
+        if (limit != Integer.MAX_VALUE) {
+            sb.append(" LIMIT " + limit);
+        }
+        return sb.toString();
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/QueryExecutor.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.List;
+
+import jdk.jfr.EventType;
+import jdk.jfr.consumer.EventStream;
+import jdk.jfr.consumer.MetadataEvent;
+
+final class QueryExecutor {
+    private final List<QueryRun> queryRuns = new ArrayList<>();
+    private final List<EventType> eventTypes = new ArrayList<>();
+    private final EventStream stream;
+
+    public QueryExecutor(EventStream stream) {
+        this(stream, List.of());
+    }
+
+    public QueryExecutor(EventStream stream, Query query) {
+        this(stream, List.of(query));
+    }
+
+    public QueryExecutor(EventStream stream, List<Query> queries) {
+        this.stream = stream;
+        for (Query query : queries) {
+            queryRuns.add(new QueryRun(stream, query));
+        }
+        stream.setReuse(false);
+        stream.setOrdered(true);
+        stream.onMetadata(this::onMetadata);
+    }
+
+    public List<QueryRun> run() {
+        stream.start();
+        for (QueryRun run : queryRuns) {
+            run.complete();
+        }
+        return queryRuns;
+    }
+
+    private void onMetadata(MetadataEvent e) {
+        if (eventTypes.isEmpty()) {
+            eventTypes.addAll(e.getEventTypes());
+        }
+        if (queryRuns.isEmpty()) {
+            addQueryRuns();
+        }
+        for (QueryRun run : queryRuns) {
+            run.onMetadata(e);
+        }
+    }
+
+    private void addQueryRuns() {
+        for (EventType type : eventTypes) {
+            try {
+                Query query = new Query("SELECT * FROM " + type.getName());
+                QueryRun run = new QueryRun(stream, query);
+                queryRuns.add(run);
+            } catch (ParseException pe) {
+                // The event name contained whitespace or similar, ignore.
+            }
+        }
+    }
+
+    public List<EventType> getEventTypes() {
+        return eventTypes;
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/QueryParser.java

@@ -0,0 +1,336 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Consumer;
+
+import jdk.jfr.internal.query.Configuration.Truncate;
+import jdk.jfr.internal.query.Query.Condition;
+import jdk.jfr.internal.query.Query.Expression;
+import jdk.jfr.internal.query.Query.Formatter;
+import jdk.jfr.internal.query.Query.Grouper;
+import jdk.jfr.internal.query.Query.OrderElement;
+import jdk.jfr.internal.query.Query.Property;
+import jdk.jfr.internal.query.Query.SortOrder;
+import jdk.jfr.internal.query.Query.Source;
+import jdk.jfr.internal.util.Tokenizer;
+
+final class QueryParser implements AutoCloseable {
+    static final char[] SEPARATORS = {'=', ',', ';', '(', ')'};
+
+    private final Tokenizer tokenizer;
+
+    public QueryParser(String text) {
+        tokenizer = new Tokenizer(text, SEPARATORS);
+    }
+
+    public List<String> column() throws ParseException {
+        if (!tokenizer.accept("COLUMN")) {
+            return List.of();
+        }
+        List<String> texts = new ArrayList<>();
+        texts.add(text());
+        while (tokenizer.accept(",")) {
+            texts.add(text());
+        }
+        return texts;
+    }
+
+    public List<Formatter> format() throws ParseException {
+        if (tokenizer.accept("FORMAT")) {
+            List<Formatter> formatters = new ArrayList<>();
+            formatters.add(formatter());
+            while (tokenizer.accept(",")) {
+                formatters.add(formatter());
+            }
+            return formatters;
+        }
+        return List.of();
+    }
+
+    private Formatter formatter() throws ParseException {
+        List<Property> properties = new ArrayList<>();
+        properties.add(property());
+        while (tokenizer.accept(";")) {
+            properties.add(property());
+        }
+        return new Formatter(properties);
+    }
+
+    public List<Expression> select() throws ParseException {
+        tokenizer.expect("SELECT");
+        if (tokenizer.accept("*")) {
+            return List.of();
+        }
+        List<Expression> expressions = new ArrayList<>();
+        if (tokenizer.accept("FROM")) {
+            throw new ParseException("Missing fields in SELECT statement", position());
+        }
+        expressions.add(expression());
+        while (tokenizer.accept(",")) {
+            Expression exp = expression();
+            if (exp.name().equalsIgnoreCase("FROM")) {
+                throw new ParseException("Missing field name in SELECT statement, or qualify field with event type if name is called '" + exp.name() + "'", position());
+            }
+            expressions.add(exp);
+        }
+        return expressions;
+    }
+
+    private Expression expression() throws ParseException {
+        Expression aggregator = aggregator();
+        if (aggregator != null) {
+            return aggregator;
+        } else {
+            return new Expression(eventField(), alias(), Aggregator.MISSING);
+        }
+    }
+
+    private Expression aggregator() throws ParseException {
+        for (Aggregator function : Aggregator.values()) {
+            if (tokenizer.accept(function.name, "(")) {
+                String eventField = eventField();
+                tokenizer.expect(")");
+                return new Expression(eventField, alias(), function);
+            }
+        }
+        return null;
+    }
+
+    private Optional<String> alias() throws ParseException {
+        Optional<String> alias = Optional.empty();
+        if (tokenizer.accept("AS")) {
+            alias = Optional.of(symbol());
+        }
+        return alias;
+    }
+
+    public List<Source> from() throws ParseException {
+        tokenizer.expect("FROM");
+        List<Source> sources = new ArrayList<>();
+        sources.add(source());
+        while (tokenizer.accept(",")) {
+            sources.add(source());
+        }
+        return sources;
+    }
+
+    private Source source() throws ParseException {
+        String type = type();
+        if (tokenizer.accept("SELECT")) {
+            throw new ParseException("Subquery is not allowed", position());
+        }
+        if (tokenizer.accept("INNER", "JOIN", "LEFT", "RIGHT", "FULL")) {
+            throw new ParseException("JOIN is not allowed", position());
+        }
+        return new Source(type, alias());
+    }
+
+    private String type() throws ParseException {
+        return tokenizer.next();
+    }
+
+    public List<Condition> where() throws ParseException {
+        if (tokenizer.accept("WHERE")) {
+            List<Condition> conditions = new ArrayList<>();
+            conditions.add(condition());
+            while (tokenizer.accept("AND")) {
+                conditions.add(condition());
+            }
+            return conditions;
+        }
+        return List.of();
+    }
+
+    private Condition condition() throws ParseException {
+        String field = eventField();
+        if (tokenizer.acceptAny("<", ">", "<>", ">=", "<=", "==", "BETWEEN", "LIKE", "IN")) {
+            throw new ParseException("The only operator allowed in WHERE clause is '='", position());
+        }
+        tokenizer.expect("=");
+        String value = text();
+        return new Condition(field, value);
+    }
+
+    public List<Grouper> groupBy() throws ParseException {
+        if (tokenizer.accept("HAVING")) {
+            throw new ParseException("HAVING is not allowed", position());
+        }
+        if (tokenizer.accept("GROUP")) {
+            tokenizer.expect("BY");
+            List<Grouper> groupers = new ArrayList<>();
+            groupers.add(grouper());
+            while (tokenizer.accept(",")) {
+                groupers.add(grouper());
+            }
+            return groupers;
+        }
+        return new ArrayList<>(); // Need to return mutable collection
+    }
+
+    private Grouper grouper() throws ParseException {
+        return new Grouper(eventField());
+    }
+
+    public List<OrderElement> orderBy() throws ParseException {
+        if (tokenizer.accept("ORDER")) {
+            tokenizer.expect("BY");
+            List<OrderElement> fields = new ArrayList<>();
+            fields.add(orderer());
+            while (tokenizer.accept(",")) {
+                fields.add(orderer());
+            }
+            return fields;
+        }
+        return List.of();
+    }
+
+    private OrderElement orderer() throws ParseException {
+        return new OrderElement(eventField(), sortOrder());
+    }
+
+    private SortOrder sortOrder() throws ParseException {
+        if (tokenizer.accept("ASC")) {
+            return SortOrder.ASCENDING;
+        }
+        if (tokenizer.accept("DESC")) {
+            return SortOrder.DESCENDING;
+        }
+        return SortOrder.NONE;
+    }
+
+    private String text() throws ParseException {
+        if (tokenizer.peekChar() != '\'') {
+            throw new ParseException("Expected text to start with a single quote character", position());
+        }
+        return tokenizer.next();
+    }
+
+    private String symbol() throws ParseException {
+        String s = tokenizer.next();
+        for (int index = 0; index < s.length(); index++) {
+            int cp = s.codePointAt(index);
+            if (!Character.isLetter(cp)) {
+                throw new ParseException("Symbol must consist of letters, found '" + s.charAt(index) + "' in '" + s + "'",
+                        position());
+            }
+        }
+        return s;
+    }
+
+    private String eventField() throws ParseException {
+        if (!tokenizer.hasNext()) {
+            throw new ParseException("Unexpected end when looking for event field", position());
+        }
+        if (tokenizer.peekChar() == '\'') {
+            throw new ParseException("Expected unquoted symbolic name (not label)", position());
+        }
+        String name = tokenizer.next();
+        if (name.equals("*")) {
+            return name;
+        }
+        for (int index = 0; index < name.length(); index++) {
+            char c = name.charAt(index);
+            boolean valid = index == 0 ? Character.isJavaIdentifierStart(c) : Character.isJavaIdentifierPart(c);
+            if (c != '.' && c != '[' && c!= ']' && c != '|' && !valid) {
+                throw new ParseException("Not a valid field name: " + name, position());
+            }
+        }
+        return name;
+    }
+
+    private Property property() throws ParseException {
+        String text = tokenizer.next();
+        Consumer<Field> style = switch (text.toLowerCase()) {
+            case "none" -> field -> {};
+            case "missing:" -> field -> {};
+            case "normalized" -> field -> field.normalized = field.percentage = true;
+            case "truncate-beginning" -> field -> field.truncate = Truncate.BEGINNING;
+            case "truncate-end" -> field -> field.truncate = Truncate.END;
+            default -> {
+                if (text.startsWith("missing:")) {
+                    yield missing(text.substring("missing:".length()));
+                }
+                if (text.startsWith("cell-height:")) {
+                    yield cellHeight(text.substring("cell-height:".length()));
+                }
+                throw new ParseException("Unknown formatter '" + text + "'", position());
+            }
+        };
+        return new Property(text, style);
+    }
+
+    private Consumer<Field> missing(String missing) {
+        if ("whitespace".equals(missing)) {
+           return field -> field.missingText = "";
+        } else {
+           return field -> field.missingText = missing;
+        }
+    }
+
+    private Consumer<Field> cellHeight(String height) throws ParseException {
+        try {
+            int h = Integer.parseInt(height);
+            if (h < 1) {
+                throw new ParseException("Expected 'cell-height:' to be at least 1' ", position());
+            }
+            return field -> field.cellHeight = h;
+        } catch (NumberFormatException nfe) {
+            throw new ParseException("Not valid number for 'cell-height:' " + height, position());
+        }
+    }
+
+    public int position() {
+        return tokenizer.getPosition();
+    }
+
+    public int limit() throws ParseException {
+        if (tokenizer.accept("LIMIT")) {
+            try {
+                if (tokenizer.hasNext()) {
+                    String number = tokenizer.next();
+                    int limit= Integer.parseInt(number);
+                    if (limit < 0) {
+                        throw new ParseException("Expected a positive integer after LIMIT", position());
+                    }
+                    return limit;
+                }
+            } catch (NumberFormatException nfe) {
+                // Fall through
+            }
+            throw new ParseException("Expected an integer after LIMIT", position());
+        }
+        return Integer.MAX_VALUE;
+    }
+
+    @Override
+    public void close() throws ParseException {
+        tokenizer.close();
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/QueryPrinter.java

@@ -0,0 +1,303 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import jdk.jfr.AnnotationElement;
+import jdk.jfr.EventType;
+import jdk.jfr.Experimental;
+import jdk.jfr.Relational;
+import jdk.jfr.ValueDescriptor;
+import jdk.jfr.consumer.EventStream;
+import jdk.jfr.internal.Utils;
+import jdk.jfr.internal.util.Columnizer;
+import jdk.jfr.internal.util.Output;
+import jdk.jfr.internal.util.StopWatch;
+import jdk.jfr.internal.util.Tokenizer;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
+import jdk.jfr.internal.util.ValueFormatter;
+
+/**
+ * Class responsible for executing and displaying the contents of a query.
+ * <p>
+ * Used by 'jcmd JFR.query' and 'jfr query'.
+ */
+public final class QueryPrinter {
+    private final EventStream stream;
+    private final Configuration configuration;
+    private final Output out;
+    private final StopWatch stopWatch;
+
+    /**
+     * Constructs a query printer.
+     *
+     * @param configuration display configuration
+     * @param stream a non-started stream from where data should be fetched.
+     */
+    public QueryPrinter(Configuration configuration, EventStream stream) {
+        this.configuration = configuration;
+        this.out = configuration.output;
+        this.stopWatch = new StopWatch();
+        this.stream = stream;
+    }
+
+    /**
+     * Prints the query.
+     *
+     * @see getGrammarText().
+     *
+     * @param query the query text
+     *
+     * @throws UserDataException   if the stream associated with the printer lacks
+     *                             event or event metadata
+     * @throws UserSyntaxException if the syntax of the query is incorrect.
+     */
+    public void execute(String query) throws UserDataException, UserSyntaxException {
+        if (showEvents(query) || showFields(query)) {
+            return;
+        }
+        showQuery(query);
+    }
+
+    private void showQuery(String query) throws UserDataException, UserSyntaxException {
+        try {
+            stopWatch.beginQueryValidation();
+            Query q = new Query(query);
+            QueryExecutor executor = new QueryExecutor(stream, q);
+            stopWatch.beginAggregation();
+            QueryRun task = executor.run().getFirst();
+            if (!task.getSyntaxErrors().isEmpty()) {
+                throw new UserSyntaxException(task.getSyntaxErrors().getFirst());
+            }
+            if (!task.getMetadataErrors().isEmpty()) {
+                throw new UserDataException(task.getMetadataErrors().getFirst());
+            }
+            Table table = task.getTable();
+            if (configuration.verboseTitle) {
+                FilteredType type = table.getFields().getFirst().type;
+                configuration.title = type.getLabel();
+                if (type.isExperimental()) {
+                    configuration.title += " (Experimental)";
+                }
+            }
+            stopWatch.beginFormatting();
+            TableRenderer renderer = new TableRenderer(configuration, table, q);
+            renderer.render();
+            stopWatch.finish();
+            if (configuration.verbose) {
+                out.println();
+                out.println("Execution: " + stopWatch.toString());
+            }
+            if (configuration.startTime != null) {
+                String s = ValueFormatter.formatTimestamp(configuration.startTime);
+                String e = ValueFormatter.formatTimestamp(configuration.endTime);
+                out.println();
+                out.println("Timespan: " + s + " - " + e);
+            }
+        } catch (ParseException pe) {
+            throw new UserSyntaxException(pe.getMessage());
+        }
+    }
+
+    private boolean showFields(String text) {
+        String eventType = null;
+        try (Tokenizer t = new Tokenizer(text)) {
+            t.expect("SHOW");
+            t.expect("FIELDS");
+            eventType = t.next();
+        } catch (ParseException pe) {
+            return false;
+        }
+        Map<Long, EventType> eventTypes = new HashMap<>();
+        stream.onMetadata(e -> {
+            for (EventType t : e.getAddedEventTypes()) {
+                eventTypes.put(t.getId(), t);
+            }
+        });
+        stream.start();
+
+        List<EventType> types = new ArrayList<>(eventTypes.values());
+        Collections.sort(types, Comparator.comparing(EventType::getName));
+        for (EventType type : types) {
+            String qualifiedName = type.getName();
+            String name = Utils.makeSimpleName(qualifiedName);
+            if (qualifiedName.equals(eventType) || name.equals(eventType)) {
+                printFields(type, types);
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private void printFields(EventType type, List<EventType> allTypes) {
+        out.println();
+        out.println("" + type.getName() + ":");
+        out.println();
+        for (ValueDescriptor f : type.getFields()) {
+            String typeName = Utils.makeSimpleName(f.getTypeName());
+            out.println(" " + typeName + " " + f.getName());
+        }
+        List<String> related = new ArrayList<>();
+        for (String s : relations(type)) {
+            out.println();
+            String simpleName = Utils.makeSimpleName(s);
+            out.println("Event types with a " + simpleName + " relation:");
+            out.println();
+            for (EventType et : allTypes) {
+                if (et != type) {
+                    List<String> r = relations(et);
+                    if (r.contains(s)) {
+                        related.add(et.getName());
+                    }
+                }
+            }
+            out.println(new Columnizer(related, 2).toString());
+        }
+        out.println();
+    }
+
+    private List<String> relations(EventType type) {
+        List<String> relations = new ArrayList<>();
+        for (ValueDescriptor field : type.getFields()) {
+            for (AnnotationElement annotation : field.getAnnotationElements()) {
+                Relational relation = annotation.getAnnotation(Relational.class);
+                if (relation != null) {
+                    relations.add(annotation.getTypeName());
+                }
+            }
+        }
+        return relations;
+    }
+
+    private boolean showEvents(String queryText) {
+        try (Tokenizer t = new Tokenizer(queryText)) {
+            t.expect("SHOW");
+            t.expect("EVENTS");
+        } catch (ParseException pe) {
+            return false;
+            // Ignore
+        }
+        out.println("Event Types (number of events):");
+        out.println();
+        Map<Long, Long> eventCount = new HashMap<>();
+        Map<Long, EventType> eventTypes = new HashMap<>();
+        stream.onMetadata(e -> {
+            for (EventType t : e.getAddedEventTypes()) {
+                eventTypes.put(t.getId(), t);
+            }
+        });
+        stream.onEvent(event -> {
+            eventCount.merge(event.getEventType().getId(), 1L, Long::sum);
+        });
+        stream.start();
+        List<String> types = new ArrayList<>();
+        for (EventType type : eventTypes.values()) {
+            if (!isExperimental(type)) {
+                String name = Utils.makeSimpleName(type);
+                Long count = eventCount.get(type.getId());
+                String countText = count == null ? "" : " (" + count + ")";
+                types.add(name + countText);
+            }
+        }
+        out.println(new Columnizer(types, 2).toString());
+        return true;
+    }
+
+    private boolean isExperimental(EventType t) {
+        return t.getAnnotation(Experimental.class) != null;
+    }
+
+    public static String getGrammarText() {
+        return """
+                Grammar:
+
+                 query       ::= [column] [format] select from [where] [groupBy] [orderBy] [limit]
+                 column      ::= "COLUMN" text ("," text)*
+                 format      ::= "FORMAT" formatter ("," formatter)*
+                 formatter   ::= property (";" property)*
+                 select      ::= "SELECT" "*" | expression ("," expression)*
+                 expression  ::= (aggregator | field) [alias]
+                 aggregator  ::= function "(" (field | "*") ")"
+                 alias       ::= "AS" symbol
+                 from        ::= "FROM" source ("," source)*
+                 source      ::= type [alias]
+                 where       ::= condition ("AND" condition)*
+                 condition   ::= field "=" text
+                 groupBy     ::= "GROUP BY" field ("," field)*
+                 orderBy     ::= "ORDER BY" orderField ("," orderField)*
+                 orderField  ::= field [sortOrder]
+                 sortOrder   ::= "ASC" | "DESC"
+                 limit       ::= "LIMIT" <integer>
+
+                 - text, characters surrounded by single quotes
+                 - symbol, alphabetic characters
+                 - type, the event type name, for example SystemGC. To avoid ambiguity,
+                   the name may be qualified, for example jdk.SystemGC
+                 - field, the event field name, for example stackTrace.
+                   To avoid ambiguity, the name may be qualified, for example
+                   jdk.SystemGC.stackTrace. A type alias declared in a FROM clause
+                   can be used instead of the type, for example S.eventThread
+                 - function, determines how fields are aggregated when using GROUP BY.
+                   Aggregate functions are:
+                    AVG: The numeric average
+                    COUNT: The number of values
+                    DIFF: The numeric difference between the last and first value
+                    FIRST: The first value
+                    LAST: The last value
+                    LAST_BATCH: The last set of values with the same end timestamp
+                    LIST: All values in a comma-separated list
+                    MAX: The numeric maximum
+                    MEDIAN: The numeric median
+                    MIN: The numeric minimum
+                    P90, P95, P99, P999: The numeric percentile, 90%, 95%, 99% or 99.9%
+                    STDEV: The numeric standard deviation
+                    SUM: The numeric sum
+                    UNIQUE: The unique number of occurrences of a value
+                   Null values are included, but ignored for numeric functions. If no
+                   aggregator function is specified, the first non-null value is used.
+                 - property, any of the following:
+                    cell-height:<integer> Maximum height of a table cell
+                    missing:whitespace Replace missing values (N/A) with blank space
+                    normalized Normalize values between 0 and 1.0 for the column
+                    truncate-beginning if value can't fit a table cell, remove the first characters
+                    truncate-end if value can't fit a table cell, remove the last characters
+
+                 If no value exist, or a numeric value can't be aggregated, the result is 'N/A',
+                 unless missing:whitespace is used. The top frame of a stack trace can be referred'
+                 to as stackTrace.topFrame. When multiple event types are specified in a FROM clause,
+                 the union of the event types are used (not the cartesian product)
+
+                 To see all available events, use the query '"SHOW EVENTS"'. To see all fields for
+                 a particular event type, use the query '"SHOW FIELDS <type>"'.""";
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/QueryResolver.java

@@ -0,0 +1,372 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.StringJoiner;
+import java.util.function.Function;
+import java.util.regex.Pattern;
+
+import jdk.jfr.EventType;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.jfr.internal.Utils;
+import jdk.jfr.internal.query.FilteredType.Filter;
+import jdk.jfr.internal.query.Query.Condition;
+import jdk.jfr.internal.query.Query.Expression;
+import jdk.jfr.internal.query.Query.Formatter;
+import jdk.jfr.internal.query.Query.Grouper;
+import jdk.jfr.internal.query.Query.OrderElement;
+import jdk.jfr.internal.query.Query.Source;
+import jdk.jfr.internal.util.Matcher;
+import jdk.jfr.internal.util.SpellChecker;
+
+/**
+ * Purpose of this class is to take a query and all available event types and
+ * check that the query is valid, for example, to see if all fields and types
+ * referenced in the query exists. The end result is a list of fields
+ * suitable for grouping, sorting and rendering operations later.
+ */
+final class QueryResolver {
+    @SuppressWarnings("serial")
+    static class QueryException extends Exception {
+        public QueryException(String message) {
+            super(message);
+        }
+    }
+
+    @SuppressWarnings("serial")
+    static final class QuerySyntaxException extends QueryException {
+        public QuerySyntaxException(String message) {
+            super(message);
+        }
+    }
+
+    private final List<EventType> eventTypes;
+    private final List<FilteredType> fromTypes = new ArrayList<>();
+    private final Map<String, FilteredType> typeAliases = new LinkedHashMap<>();
+    private final Map<String, Field> fieldAliases = new LinkedHashMap<>();
+    private final List<Field> resultFields = new ArrayList<>();
+
+    // For readability take query apart
+    private final List<String> column;
+    private final List<Formatter> format;
+    private final List<Expression> select;
+    private final List<Source> from;
+    private final List<Condition> where;
+    private final List<OrderElement> orderBy;
+    private final List<Grouper> groupBy;
+
+    public QueryResolver(Query query, List<EventType> eventTypes) {
+        this.eventTypes = eventTypes;
+        this.column = query.column;
+        this.format = query.format;
+        this.select = query.select;
+        this.from = query.from;
+        this.where = query.where;
+        this.orderBy = query.orderBy;
+        this.groupBy = query.groupBy;
+    }
+
+    public List<Field> resolve() throws QueryException {
+        resolveFrom();
+        resolveSelect();
+        resolveGroupBy();
+        resolveOrderBy();
+        resolveWhere();
+        applyColumn();
+        applyFormat();
+        return resultFields;
+    }
+
+    private void resolveWhere() throws QuerySyntaxException {
+        for (Condition condition : where) {
+            List<Field> fields = new ArrayList<>();
+            String fieldName = condition.field();
+            Field aliasedField = fieldAliases.get(fieldName);
+            if (aliasedField != null) {
+                fields.add(aliasedField);
+            } else {
+                fields.addAll(resolveFields(fieldName, fromTypes));
+            }
+            for (Field field : fields) {
+                field.type.addFilter(new Filter(field, condition.value()));
+            }
+        }
+    }
+
+    private void resolveFrom() throws QueryException {
+        for (Source source : from) {
+            List<EventType> eventTypes = resolveEventType(source.name());
+            if (!source.alias().isEmpty() && eventTypes.size() > 1) {
+                throw new QueryException("Alias can only refer to a single event type");
+            }
+            for (EventType eventType : eventTypes) {
+                FilteredType type = new FilteredType(eventType);
+                fromTypes.add(type);
+                source.alias().ifPresent(alias -> typeAliases.put(alias, type));
+            }
+        }
+    }
+
+    private void resolveSelect() throws QueryException {
+        if (select.isEmpty()) { // SELECT *
+            resultFields.addAll(FieldBuilder.createWildcardFields(eventTypes, fromTypes));
+            return;
+        }
+        for (Expression expression : select) {
+            Field field = addField(expression.name(), fromTypes);
+            field.visible = true;
+            field.aggregator = expression.aggregator();
+            FieldBuilder.configureAggregator(field);
+            expression.alias().ifPresent(alias -> fieldAliases.put(alias, field));
+            if (field.name.equals("*") && field.aggregator != Aggregator.COUNT) {
+                throw new QuerySyntaxException("Wildcard ('*') can only be used with aggregator function COUNT");
+            }
+        }
+    }
+
+    private void resolveGroupBy() throws QueryException {
+        if (groupBy.isEmpty()) {
+            // Queries on the form "SELECT SUM(a), b, c FROM D" should group all rows implicitly
+            var f = select.stream().filter(e -> e.aggregator() != Aggregator.MISSING).findFirst();
+            if (f.isPresent()) {
+                Grouper grouper = new Grouper("startTime");
+                for (var fr : fromTypes) {
+                    Field implicit = addField("startTime", List.of(fr));
+                    implicit.valueGetter = e -> 1;
+                    implicit.grouper = grouper;
+                }
+                groupBy.add(grouper);
+                return;
+            }
+        }
+
+        for (Grouper grouper : groupBy) {
+            for (FilteredType type : fromTypes) {
+                String fieldName = grouper.field();
+                // Check if alias exists, e.g. "SELECT field AS K FROM ... GROUP BY K"
+                Field field= fieldAliases.get(fieldName);
+                if (field != null) {
+                    fieldName = field.name;
+                    if (field.aggregator != Aggregator.MISSING) {
+                        throw new QueryException("Aggregate funtion can't be used together with an alias");
+                    }
+                }
+                field = addField(fieldName, List.of(type));
+                field.grouper = grouper;
+            }
+        }
+    }
+
+    private void resolveOrderBy() throws QueryException {
+        for (OrderElement orderer : orderBy) {
+            Field field = fieldAliases.get(orderer.name());
+            if (field == null) {
+                field = addField(orderer.name(), fromTypes);
+            }
+            field.orderer = orderer;
+        }
+    }
+
+    private void applyColumn() throws QueryException {
+        if (column.isEmpty()) {
+            return;
+        }
+        if (column.size() != select.size()) {
+            throw new QuerySyntaxException("Number of fields in COLUMN clause doesn't match SELECT");
+        }
+
+        for (Field field : resultFields) {
+            if (field.visible) {
+                field.label = column.get(field.index);
+            }
+        }
+    }
+
+    private void applyFormat() throws QueryException {
+        if (format.isEmpty()) {
+            return;
+        }
+        if (format.size() != select.size()) {
+            throw new QueryException("Number of fields in FORMAT doesn't match SELECT");
+        }
+        for (Field field : resultFields) {
+            if (field.visible) {
+                for (var formatter : format.get(field.index).properties()) {
+                    formatter.style().accept(field);
+                }
+            }
+        }
+    }
+
+    private Field addField(String name, List<FilteredType> types) throws QueryException {
+        List<Field> fields = resolveFields(name, types);
+        if (fields.isEmpty()) {
+            throw new QueryException(unknownField(name, types));
+        }
+
+        Field primary = fields.getFirst();
+        boolean mixedTypes = false;
+        for (Field f : fields) {
+            if (!f.dataType.equals(primary.dataType)) {
+                mixedTypes = true;
+            }
+        }
+        for (Field field: fields) {
+            field.index = resultFields.size();
+            primary.sourceFields.add(field);
+            // Convert to String if field data types mismatch
+            if (mixedTypes) {
+                final Function<RecordedEvent, Object> valueGetter = field.valueGetter;
+                field.valueGetter = event -> {
+                  return FieldFormatter.format(field, valueGetter.apply(event));
+                };
+                field.lexicalSort = true;
+                field.dataType = String.class.getName();
+                field.alignLeft = true;
+            }
+        }
+        resultFields.add(primary);
+        return primary;
+    }
+
+    private List<Field> resolveFields(String name, List<FilteredType> types) {
+        List<Field> fields = new ArrayList<>();
+
+        if (name.equals("*")) {
+            // Used with COUNT(*) and UNIQUE(*)
+            // All events should have a start time
+            name = "startTime";
+        }
+        if (name.startsWith("[")) {
+            int index = name.indexOf("]");
+            if (index != -1) {
+                String typeNames = name.substring(1, index);
+                String suffix = name.substring(index + 1);
+                for (String typeName : typeNames.split(Pattern.quote("|"))) {
+                    fields.addAll(resolveFields(typeName + suffix, types));
+                }
+                return fields;
+            }
+        }
+
+        // Match "namespace.Event.field" and "Event.field"
+        if (name.contains(".")) {
+            for (FilteredType et : types) {
+                String fullEventType = et.getName() + ".";
+                if (name.startsWith(fullEventType)) {
+                    String fieldName = name.substring(fullEventType.length());
+                    FieldBuilder fb = new FieldBuilder(eventTypes, et, fieldName);
+                    fields.addAll(fb.build());
+                }
+                String eventType = et.getSimpleName() + ".";
+                if (name.startsWith(eventType)) {
+                    String fieldName = name.substring(eventType.length());
+                    FieldBuilder fb = new FieldBuilder(eventTypes, et, fieldName);
+                    fields.addAll(fb.build());
+                }
+            }
+        }
+        // Match "ALIAS.field" where ALIAS can be "namespace.Event" or "Event"
+        for (var entry : typeAliases.entrySet()) {
+            String alias = entry.getKey() + ".";
+            FilteredType s = entry.getValue();
+            if (name.startsWith(alias)) {
+                int index = name.indexOf(".");
+                String unaliased = s.getName() + "." + name.substring(index + 1);
+                fields.addAll(resolveFields(unaliased, List.of(s)));
+            }
+        }
+
+        // Match without namespace
+        for (FilteredType eventType : types) {
+            FieldBuilder fb = new FieldBuilder(eventTypes, eventType, name);
+            fields.addAll(fb.build());
+        }
+        return fields;
+    }
+
+    private List<EventType> resolveEventType(String name) throws QueryException {
+        List<EventType> types = new ArrayList<>();
+        // Match fully qualified name first
+        for (EventType eventType : eventTypes) {
+            if (Matcher.match(eventType.getName(),name)) {
+                types.add(eventType);
+            }
+        }
+        // Match less qualified name
+        for (EventType eventType : eventTypes) {
+            if (eventType.getName().endsWith("." + name)) {
+                types.add(eventType);
+                break;
+            }
+        }
+        if (types.isEmpty()) {
+            throw new QueryException(unknownEventType(eventTypes, name));
+        }
+        return types;
+    }
+
+    private static String unknownField(String name, List<FilteredType> types) {
+        List<String> alternatives = new ArrayList<>();
+        StringJoiner sj = new StringJoiner(", ");
+        for (FilteredType t : types) {
+            for (var v : t.getFields()) {
+                alternatives.add(v.getName());
+                alternatives.add(t.getName() + "." + v.getName());
+                alternatives.add(t.getSimpleName() + "." + v.getName());
+            }
+            sj.add(t.getName());
+        }
+        String message = "Can't find field named '" + name + "' in " + sj;
+        String alternative = SpellChecker.check(name, alternatives);
+        if (alternative != null) {
+            return message + ".\nDid you mean '" + alternative + "'?";
+        } else {
+            return message + ".\nUse 'SHOW FIELDS " + types.getFirst().getSimpleName() + "' to list available fields.";
+        }
+    }
+
+    private static String unknownEventType(List<EventType> eventTypes, String name) {
+        List<String> alternatives = new ArrayList<>();
+        for (EventType type : eventTypes) {
+            alternatives.add(Utils.makeSimpleName(type));
+        }
+        String alternative = SpellChecker.check(name, alternatives);
+        String message = "Can't find event type named '" + name + "'.";
+        if (alternative != null) {
+            return message + " Did you mean '" + alternative + "'?";
+        } else {
+            return message + " 'SHOW EVENTS' will list available event types.";
+        }
+    }
+
+    public List<FilteredType> getFromTypes() {
+        return fromTypes;
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/QueryRun.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+
+import jdk.jfr.consumer.EventStream;
+import jdk.jfr.consumer.MetadataEvent;
+import jdk.jfr.internal.query.QueryResolver.QueryException;
+import jdk.jfr.internal.query.QueryResolver.QuerySyntaxException;
+
+final class QueryRun {
+    private final Histogram histogram = new Histogram();
+    private final Table table = new Table();
+    private final List<String> syntaxErrors = new ArrayList<>();
+    private final List<String> metadataErrors = new ArrayList<>();
+    private final Query query;
+    private final EventStream stream;
+
+    public QueryRun(EventStream stream, Query query) {
+        this.stream = stream;
+        this.query = query;
+    }
+
+    void onMetadata(MetadataEvent e) {
+        if (table.getFields().isEmpty()) {
+            // Only use first metadata event for now
+            try {
+                QueryResolver resolver = new QueryResolver(query, e.getEventTypes());
+                List<Field> fields = resolver.resolve();
+                table.addFields(fields);
+                histogram.addFields(fields);
+                addEventListeners();
+            } catch (QuerySyntaxException qe) {
+                syntaxErrors.add(qe.getMessage());
+            } catch (QueryException qe) {
+                metadataErrors.add(qe.getMessage());
+            }
+        }
+    }
+
+    public void complete() {
+        if (!query.groupBy.isEmpty()) {
+            table.addRows(histogram.toRows());
+        }
+    }
+
+    private void addEventListeners() {
+        for (var entry : groupByTypeDescriptor().entrySet()) {
+            FilteredType type = entry.getKey();
+            List<Field> sourceFields = entry.getValue();
+            stream.onEvent(type.getName(), e -> {
+                for (var filter : type.getFilters()) {
+                    Object object = filter.field().valueGetter.apply(e);
+                    String text = FieldFormatter.format(filter.field(), object);
+                    if (!text.equals(filter.value())) {
+                        return;
+                    }
+                }
+                if (query.groupBy.isEmpty()) {
+                    table.add(e, sourceFields);
+                } else {
+                    histogram.add(e, type, sourceFields);
+                }
+            });
+        }
+    }
+
+    private LinkedHashMap<FilteredType, List<Field>> groupByTypeDescriptor() {
+        var multiMap = new LinkedHashMap<FilteredType, List<Field>>();
+        for (Field field : table.getFields()) {
+            for (Field sourceFields : field.sourceFields) {
+                multiMap.computeIfAbsent(sourceFields.type, k -> new ArrayList<>()).add(field);
+            }
+        }
+        return multiMap;
+    }
+
+    public List<String> getSyntaxErrors() {
+        return syntaxErrors;
+    }
+
+    public List<String> getMetadataErrors() {
+        return metadataErrors;
+    }
+
+    public Query getQuery() {
+        return query;
+    }
+
+    public Table getTable() {
+        return table;
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/Row.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.util.Arrays;
+
+final class Row {
+    private final Object[] values;
+    private final String[] texts;
+
+    public Row(int size) {
+        values = new Object[size];
+        texts = new String[size];
+    }
+
+    public Object getValue(int index) {
+        return values[index];
+    }
+
+    public void putValue(int index, Object o) {
+        values[index] = o;
+    }
+
+    public String getText(int index) {
+        return texts[index];
+    }
+
+    public void putText(int index, String text) {
+        texts[index] = text;
+    }
+
+    @Override
+    public String toString() {
+        return Arrays.asList(values).toString();
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/Table.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import jdk.jfr.consumer.RecordedEvent;
+
+/**
+ * Class responsible for holding rows, their values and textual
+ * representation.
+ */
+final class Table {
+    private final List<Row> rows = new ArrayList<>();
+    private final List<Field> fields = new ArrayList<>();
+
+    boolean isEmpty() {
+        return rows.isEmpty();
+    }
+
+    void addRows(List<Row> rows) {
+        this.rows.addAll(rows);
+    }
+
+    List<Row> getRows() {
+        return rows;
+    }
+
+    void addFields(List<Field> fields) {
+        for (int index = 0; index <fields.size(); index++) {
+            if (fields.get(index).index != index) {
+                throw new InternalError("Field index not in sync. with array position");
+            }
+        }
+        this.fields.addAll(fields);
+    }
+
+    List<Field> getFields() {
+        return fields;
+    }
+
+    public void add(RecordedEvent event, List<Field> sourceFields) {
+        Row row = new Row(fields.size());
+        for (Field field : sourceFields) {
+            row.putValue(field.index, field.valueGetter.apply(event));
+        }
+        rows.add(row);
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/TableCell.java

@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.util.ArrayList;
+import java.util.List;
+import jdk.jfr.internal.query.Configuration.Truncate;
+
+final class TableCell {
+    static final String ELLIPSIS = "...";
+    static final String COLUMN_SEPARATOR = " ";
+    static final int MINIMAL_CELL_WIDTH = 1 + COLUMN_SEPARATOR.length();
+    static final int ELLIPSIS_LENGTH = ELLIPSIS.length();
+
+    private final List<String> lines = new ArrayList<>();
+    private final Truncate truncate;
+    private int preferredWidth;
+
+    final int cellHeight;
+    final Field field;
+    int width;
+
+    public TableCell(Field field, int cellHeight, Truncate truncate) {
+        this.field = field;
+        this.cellHeight = cellHeight;
+        this.truncate = truncate;
+    }
+
+    public int getContentWidth() {
+        return width - COLUMN_SEPARATOR.length();
+    }
+
+    public int getHeight() {
+        return lines.size();
+    }
+
+    public String getText(int rowIndex) {
+        return lines.get(rowIndex);
+    }
+
+    public void setPreferredWidth(int width) {
+        preferredWidth = width;
+    }
+
+    public int getPreferredWidth() {
+        return preferredWidth;
+    }
+    public void addLine(String text) {
+        int contentWidth = getContentWidth();
+        if (text.length() >= contentWidth) {
+            add(truncate(text, contentWidth));
+        } else {
+            addAligned(text);
+        }
+    }
+
+    public void setContent(String text) {
+        clear();
+        int contentSize = getContentSize();
+        // Bail out early to prevent ellipsis when size is the same
+        if (text.length() == contentSize) {
+            add(text);
+            return;
+        }
+        // Text is larger than size of the cell, truncate
+        if (text.length() >= contentSize) {
+            add(truncate(text, contentSize));
+            return;
+        }
+        // Text fits on one line, pad left or right depending on alignment
+        int contentWidth = getContentWidth();
+        if (text.length() < contentWidth) {
+            addAligned(text);
+            return;
+        }
+        // Multiple lines and text fits cell
+        add(text);
+    }
+
+    private void addAligned(String text) {
+        String padding = " ".repeat(getContentWidth() - text.length());
+        if (field.alignLeft) {
+            add(text + padding);
+        } else {
+            add(padding + text);
+        }
+    }
+
+    public int getContentSize() {
+        return cellHeight * getContentWidth();
+    }
+
+    public List<String> getLines() {
+        return lines;
+    }
+
+    private String truncate(String text, int size) {
+        if (size < ELLIPSIS_LENGTH) {
+            return ELLIPSIS.substring(0, ELLIPSIS_LENGTH - size);
+        }
+        int textSize = size - ELLIPSIS_LENGTH;
+        if (truncate == Truncate.BEGINNING) {
+            return ELLIPSIS + text.substring(text.length() - textSize);
+        } else {
+            return text.substring(0, textSize) + ELLIPSIS;
+        }
+    }
+
+    private void add(String text) {
+        int contentWidth = getContentWidth();
+        int contentSize = getContentSize();
+        for (int index = 0; index < contentSize; index += contentWidth) {
+            int end = index + contentWidth;
+            if (end >= text.length()) {
+                String content = text.substring(index);
+                content += " ".repeat(contentWidth - content.length());
+                lines.add(content);
+                return;
+            }
+            lines.add(text.substring(index, end));
+        }
+    }
+
+    public void clear() {
+        lines.clear();
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/TableRenderer.java

@@ -0,0 +1,357 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import static jdk.jfr.internal.query.Configuration.MAX_PREFERRED_WIDTH;
+import static jdk.jfr.internal.query.Configuration.MIN_PREFERRED_WIDTH;
+import static jdk.jfr.internal.query.Configuration.PREFERRED_WIDTH;
+
+import java.util.List;
+import java.util.function.Predicate;
+
+import jdk.jfr.consumer.RecordedFrame;
+import jdk.jfr.consumer.RecordedMethod;
+import jdk.jfr.consumer.RecordedStackTrace;
+import jdk.jfr.internal.query.Configuration.Truncate;
+import jdk.jfr.internal.util.Output;
+
+/**
+ * Class responsible for printing and formatting the contents of a table.
+ */
+final class TableRenderer {
+    private final Configuration configuration;
+    private final List<TableCell> tableCells;
+    private final Table table;
+    private final Query query;
+    private final Output out;
+    private int width;
+    private int preferredWidth;
+
+    public TableRenderer(Configuration configuration, Table table, Query query) {
+        this.configuration = configuration;
+        this.tableCells = createTableCells(table);
+        this.table = table;
+        this.query = query;
+        this.out = configuration.output;
+    }
+
+    private List<TableCell> createTableCells(Table table) {
+        return table.getFields().stream().filter(f -> f.visible).map(f -> createTableCell(f)).toList();
+    }
+
+    private TableCell createTableCell(Field field) {
+        Truncate truncate = configuration.truncate;
+        if (truncate == null) {
+            truncate = field.truncate;
+        }
+        if (configuration.cellHeight != 0) {
+            return new TableCell(field, configuration.cellHeight, truncate);
+        } else {
+            return new TableCell(field, field.cellHeight, truncate);
+        }
+    }
+
+    public void render() {
+        if (isEmpty()) {
+            if (configuration.title != null) {
+                out.println();
+                out.println("No events found for '" + configuration.title +"'.");
+            }
+            return;
+        }
+        if (tooManyColumns()) {
+            out.println();
+            out.println("Too many columns to fit width.");
+            return;
+        }
+
+        formatRow();
+        sortRows();
+        setColumnWidths();
+        printTitle();
+        printHeaderRow();
+        printHeaderRowSeparators();
+        printRows();
+    }
+
+    private boolean isEmpty() {
+        return tableCells.isEmpty() || table.getRows().isEmpty();
+    }
+
+    private boolean tooManyColumns() {
+        int minWidth = tableCells.size() * TableCell.MINIMAL_CELL_WIDTH;
+        if (configuration.width != 0) {
+            return minWidth > configuration.width;
+        }
+        return minWidth > MAX_PREFERRED_WIDTH;
+    }
+
+    private void formatRow() {
+        double[] max = calculateNormalization();
+        for (Row row : table.getRows()) {
+            for (Field field : table.getFields()) {
+                int index = field.index;
+                Object object = row.getValue(index);
+                if (field.normalized && object instanceof Number number) {
+                    object = number.doubleValue() / max[index];
+                }
+                String text = FieldFormatter.format(field, object);
+                row.putText(index, text);
+                if (index < tableCells.size()) {
+                    TableCell cell = tableCells.get(index);
+                    int width = text.length() + TableCell.COLUMN_SEPARATOR.length();
+                    if (width > cell.getPreferredWidth()) {
+                        cell.setPreferredWidth(width);
+                    }
+                }
+            }
+        }
+    }
+
+    private double[] calculateNormalization() {
+        double[] max = new double[tableCells.size()];
+        int index = 0;
+        for (TableCell cell : tableCells) {
+            if (cell.field.normalized) {
+                for (Row row : table.getRows()) {
+                    if (row.getValue(index) instanceof Number number) {
+                        max[index] += number.doubleValue();
+                    }
+                }
+            }
+            index++;
+        }
+        return max;
+    }
+
+    private void sortRows() {
+        TableSorter sorter = new TableSorter(table, query);
+        sorter.sort();
+    }
+
+    private void setColumnWidths() {
+        setRowWidths();
+        setPreferredHeaderWidths();
+        if (configuration.width == 0) {
+            preferredWidth= determineTableWidth();
+        } else {
+            preferredWidth = configuration.width;
+        }
+        // Set minimum table cell width
+        distribute(cell -> cell.width < TableCell.MINIMAL_CELL_WIDTH);
+        // Fill with preferred width
+        distribute(cell -> cell.width < cell.getPreferredWidth());
+        // Distribute additional width to table cells with a non-fixed size
+        distribute(cell -> !cell.field.fixedWidth);
+        // If all table cells are fixed size, distribute to any of them
+        distribute(cell -> true);
+    }
+
+    private void setRowWidths() {
+        int rowCount = 0;
+        for (Row row : table.getRows()) {
+            if (rowCount == query.limit) {
+                return;
+            }
+            int columnIndex = 0;
+            for (TableCell cell : tableCells) {
+                String text = row.getText(columnIndex);
+                int width = text.length() + TableCell.COLUMN_SEPARATOR.length();
+                if (width > cell.getPreferredWidth()) {
+                    cell.setPreferredWidth(width);
+                }
+                columnIndex++;
+            }
+            rowCount++;
+        }
+    }
+
+    private void setPreferredHeaderWidths() {
+        for (TableCell cell : tableCells) {
+            int headerWidth = cell.field.label.length();
+            if (configuration.verboseHeaders) {
+                headerWidth = Math.max(fieldName(cell.field).length(), headerWidth);
+            }
+            headerWidth += TableCell.COLUMN_SEPARATOR.length();
+            if (headerWidth > cell.getPreferredWidth()) {
+                cell.setPreferredWidth(headerWidth);
+            }
+        }
+    }
+
+    private int determineTableWidth() {
+        int preferred = 0;
+        for (TableCell cell : tableCells) {
+            preferred += cell.getPreferredWidth();
+        }
+        // Avoid a very large table.
+        if (preferred > MAX_PREFERRED_WIDTH) {
+            return MAX_PREFERRED_WIDTH;
+        }
+        // Avoid a very small width, but not preferred width if there a few columns
+        if (preferred < MIN_PREFERRED_WIDTH && tableCells.size() < 3) {
+            return MIN_PREFERRED_WIDTH;
+        }
+        // Expand to preferred width
+        if (preferred < PREFERRED_WIDTH) {
+            return PREFERRED_WIDTH;
+        }
+        return preferred;
+    }
+
+    private void distribute(Predicate<TableCell> condition) {
+        long amountLeft = preferredWidth - width;
+        long last = -1;
+        while (amountLeft > 0 && amountLeft != last) {
+            last = amountLeft;
+            for (TableCell cell : tableCells) {
+                if (condition.test(cell)) {
+                    cell.width++;
+                    width++;
+                    amountLeft--;
+                }
+            }
+        }
+    }
+
+    private void printTitle() {
+        String title = configuration.title;
+        if (title != null) {
+            if (isExperimental()) {
+                title += " (Experimental)";
+            }
+            int pos = width - title.length();
+            pos = Math.max(0, pos);
+            pos = pos / 2;
+            out.println();
+            out.println(" ".repeat(pos) + title);
+            out.println();
+        }
+    }
+
+    private boolean isExperimental() {
+        return tableCells.stream().flatMap(c -> c.field.sourceFields.stream()).anyMatch(f -> f.type.isExperimental());
+    }
+
+    private void printHeaderRow() {
+        printRow(cell -> cell.field.label);
+        if (configuration.verboseHeaders) {
+            printRow(cell -> fieldName(cell.field));
+        }
+    }
+
+    private void printHeaderRowSeparators() {
+        printRow(cell -> "-".repeat(cell.getContentWidth()));
+    }
+
+    private void printRow(java.util.function.Function<TableCell, String> action) {
+        for (TableCell cell : tableCells) {
+            cell.setContent(action.apply(cell));
+        }
+        printRow();
+    }
+
+    private void printRows() {
+        int rowCount = 0;
+        for (Row row : table.getRows()) {
+            if (rowCount == query.limit) {
+                return;
+            }
+            int columnIndex = 0;
+            for (TableCell cell : tableCells) {
+                setCellContent(cell, row, columnIndex++);
+            }
+            printRow();
+            rowCount++;
+        }
+    }
+
+    private void setCellContent(TableCell cell, Row row, int columnIndex) {
+        String text = row.getText(columnIndex);
+        if (cell.cellHeight > 1) {
+            Object o = row.getValue(columnIndex);
+            if (o instanceof RecordedStackTrace s) {
+                setStackTrace(cell, s);
+                return;
+            }
+        }
+
+        if (text.length() > cell.getContentSize()) {
+            Object o = row.getValue(columnIndex);
+
+            cell.setContent(FieldFormatter.formatCompact(cell.field, o));
+            return;
+        }
+        cell.setContent(text);
+    }
+
+    private void setStackTrace(TableCell cell, RecordedStackTrace s) {
+        int row = 0;
+        cell.clear();
+        for(RecordedFrame f : s.getFrames()) {
+            if (row == cell.cellHeight) {
+                return;
+            }
+            if (f.isJavaFrame()) {
+                RecordedMethod method = f.getMethod();
+                String text = FieldFormatter.format(cell.field, method);
+                if (text.length() > cell.getContentWidth()) {
+                    text = FieldFormatter.formatCompact(cell.field, method);
+                }
+                cell.addLine(text);
+            }
+            row++;
+        }
+    }
+
+    private void printRow() {
+        long maxHeight = 0;
+        for (TableCell cell : tableCells) {
+            maxHeight = Math.max(cell.getHeight(), maxHeight);
+        }
+        TableCell lastCell = tableCells.get(tableCells.size() - 1);
+        for (int rowIndex = 0; rowIndex < maxHeight; rowIndex++) {
+            for (TableCell cell : tableCells) {
+                if (rowIndex < cell.getHeight()) {
+                    out.print(cell.getText(rowIndex));
+                } else {
+                    out.print(" ".repeat(cell.getContentWidth()));
+                }
+                if (cell != lastCell) {
+                    out.print(TableCell.COLUMN_SEPARATOR);
+                }
+            }
+            out.println();
+        }
+    }
+
+    private String fieldName(Field field) {
+        return "(" + field.name + ")";
+    }
+
+    public long getWidth() {
+        return width;
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/TableSorter.java

@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.function.Predicate;
+
+import jdk.jfr.internal.query.Query.OrderElement;
+import jdk.jfr.internal.query.Query.SortOrder;
+/**
+ * Class responsible for sorting a table according to an ORDER BY statement or
+ * a heuristics.
+ */
+final class TableSorter {
+    @SuppressWarnings({ "rawtypes", "unchecked" })
+    private static class ColumnComparator implements Comparator<Row> {
+        private final int factor;
+        private final int index;
+        private final boolean lexical;
+
+        public ColumnComparator(Field field, SortOrder order) {
+            this.factor = sortOrderToFactor(determineSortOrder(field, order));
+            this.index = field.index;
+            this.lexical = field.lexicalSort;
+        }
+
+        private SortOrder determineSortOrder(Field field, SortOrder order) {
+            if (order != SortOrder.NONE) {
+                return order;
+            }
+            if (field.timespan || field.percentage) {
+                return SortOrder.DESCENDING;
+            }
+            return SortOrder.ASCENDING;
+        }
+
+        int sortOrderToFactor(SortOrder order) {
+            return order == SortOrder.DESCENDING ? -1 : 1;
+        }
+
+        @Override
+        public int compare(Row rowA, Row rowB) {
+            if (lexical) {
+                return compareObjects(rowA.getText(index), rowB.getText(index));
+            } else {
+                return compareObjects(rowA.getValue(index), rowB.getValue(index));
+            }
+        }
+
+        private int compareObjects(Object a, Object b) {
+            if (a instanceof Comparable c1 && b instanceof Comparable c2) {
+                return factor * c1.compareTo(c2);
+            }
+            return factor;
+        }
+    }
+
+    private final Table table;
+    private final Query query;
+
+    public TableSorter(Table table, Query query) {
+        this.table = table;
+        this.query = query;
+    }
+
+    public void sort() {
+        if (table.getFields().isEmpty()) {
+            return;
+        }
+        if (query.orderBy.isEmpty()) {
+            sortDefault();
+            return;
+        }
+        sortOrderBy();
+    }
+
+    private void sortDefault() {
+        if (sortAggregators()) {
+            return;
+        }
+        if (sortGroupBy()) {
+            return;
+        }
+        sortLeftMost();
+    }
+
+    private boolean sortAggregators() {
+        return sortPredicate(field -> field.aggregator != Aggregator.MISSING);
+    }
+
+    private boolean sortGroupBy() {
+        return sortPredicate(field -> query.groupBy.contains(field.grouper));
+    }
+
+    private void sortOrderBy() {
+        for (OrderElement orderer : query.orderBy.reversed()) {
+            sortPredicate(field -> field.orderer == orderer);
+        }
+    }
+
+    private boolean sortPredicate(Predicate<Field> predicate) {
+        boolean sorted = false;
+        for (Field field : table.getFields()) {
+            if (predicate.test(field)) {
+                sort(field, determineSortOrder(field));
+                sorted = true;
+            }
+        }
+        return sorted;
+    }
+
+    private SortOrder determineSortOrder(Field field) {
+        if (field.orderer == null) {
+            return SortOrder.NONE;
+        } else {
+            return field.orderer.order();
+        }
+    }
+
+    private void sortLeftMost() {
+        sort(table.getFields().getFirst(), SortOrder.NONE);
+    }
+
+    private void sort(Field field, SortOrder order) {
+        table.getRows().sort(new ColumnComparator(field, order));
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/ViewFile.java

@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import jdk.jfr.internal.util.Tokenizer;
+
+/**
+ * Represents a configuration file that holds a set up queries and their
+ * associated metadata, such as labels and descriptions.
+ */
+final class ViewFile {
+    record ViewConfiguration(String name, String category, Map<String, String> properties) {
+        public String query() {
+            String form = get("form");
+            if (form != null) {
+                return form;
+            }
+            String table = get("table");
+            if (table != null) {
+                return table;
+            }
+            throw new IllegalStateException("Expected section to have form or table attribute");
+        }
+
+        public String getLabel() {
+            return get("label");
+        }
+
+        public String getForm() {
+            return get("form");
+        }
+
+        public String getTable() {
+            return get("table");
+        }
+
+        private String get(String key) {
+            return properties.get(key);
+        }
+    }
+
+    private final List<ViewConfiguration> configurations;
+
+    public ViewFile(String text) throws ParseException {
+        this.configurations = parse(text);
+    }
+
+    public static ViewFile getDefault() {
+        try {
+            var is = ViewFile.class.getResourceAsStream("/jdk/jfr/internal/query/view.ini");
+            byte[] bytes = is.readAllBytes();
+            String query = new String(bytes, Charset.forName("UTF-8"));
+            return new ViewFile(query);
+        } catch (ParseException e) {
+            throw new InternalError("Internal error, invalid view.ini", e);
+        } catch (IOException e) {
+            throw new InternalError("Internal error, could not read view.ini", e);
+        }
+    }
+
+    public List<ViewConfiguration> getViewConfigurations() {
+       return configurations;
+    }
+
+    private List<ViewConfiguration> parse(String text) throws ParseException {
+        List<ViewConfiguration> views = new ArrayList<>();
+        try (Tokenizer tokenizer = new Tokenizer(text, '[', ']', ';')) {
+            while (tokenizer.hasNext()) {
+                while (tokenizer.accept(";")) {
+                    tokenizer.skipLine();
+                }
+                if (tokenizer.accept("[")) {
+                    String fullName = tokenizer.next();
+                    tokenizer.expect("]");
+                    views.add(createView(fullName));
+                }
+                if (views.isEmpty()) {
+                    throw new ParseException("Expected view file to begin with a section", tokenizer.getPosition());
+                }
+                String key = tokenizer.next();
+                tokenizer.expect("=");
+                String value = tokenizer.next();
+                ViewConfiguration view = views.get(views.size() - 1);
+                view.properties().put(key, value);
+            }
+        }
+        return views;
+    }
+
+    private ViewConfiguration createView(String fullName) {
+        int index = fullName.lastIndexOf(".");
+        if (index == -1) {
+            throw new InternalError("Missing name space for " + fullName);
+        }
+        String category = fullName.substring(0, index);
+        String name = fullName.substring(index + 1);
+        return new ViewConfiguration(name, category, new LinkedHashMap<>());
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/ViewPrinter.java

@@ -0,0 +1,350 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.query;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.StringJoiner;
+
+import jdk.jfr.EventType;
+import jdk.jfr.consumer.EventStream;
+import jdk.jfr.internal.query.QueryResolver.QueryException;
+import jdk.jfr.internal.query.ViewFile.ViewConfiguration;
+import jdk.jfr.internal.util.Columnizer;
+import jdk.jfr.internal.util.Output;
+import jdk.jfr.internal.util.StopWatch;
+import jdk.jfr.internal.util.Tokenizer;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
+import jdk.jfr.internal.util.ValueFormatter;
+/**
+ * Class responsible for executing and displaying the contents of a query.
+ * <p>
+ * Used by 'jcmd JFR.view' and 'jfr view'.
+ * <p>
+ * Views are defined in jdk/jfr/internal/query/view.ini
+ */
+public final class ViewPrinter {
+    private final Configuration configuration;
+    private final EventStream stream;
+    private final Output out;
+    private final StopWatch stopWatch;
+
+    /**
+     * Constructs a view printer object.
+     *
+     * @param configuration display configuration
+     * @param stream a non-started stream from where data should be fetched.
+     */
+    public ViewPrinter(Configuration configuration, EventStream stream) {
+        this.configuration = configuration;
+        this.out = configuration.output;
+        this.stopWatch = new StopWatch();
+        this.stream = stream;
+    }
+
+    /**
+     * Prints the view.
+     *
+     * @param text the view or event type to display
+     *
+     * @throws UserDataException   if the stream associated with the printer lacks
+     *                             event or event metadata
+     * @throws UserSyntaxException if the syntax of the query is incorrect.
+     */
+    public void execute(String text) throws UserDataException, UserSyntaxException {
+        try {
+            if (showViews(text) || showEventType(text)) {
+                return;
+            }
+        } catch (ParseException pe) {
+            throw new InternalError("Internal error, view.ini file is invalid", pe);
+        }
+        throw new UserDataException("Could not find a view or an event type named " + text);
+    }
+
+    private boolean showEventType(String eventType) {
+        try {
+            QueryPrinter printer = new QueryPrinter(configuration, stream);
+            configuration.verboseTitle = true;
+            printer.execute("SELECT * FROM " + eventType);
+            return true;
+        } catch (UserDataException | UserSyntaxException e) {
+            return false;
+        }
+    }
+
+    private boolean showViews(String text) throws UserDataException, ParseException, UserSyntaxException {
+        if (configuration.verbose) {
+            configuration.verboseHeaders = true;
+        }
+        if (text.equalsIgnoreCase("all-events")) {
+            QueryExecutor executor = new QueryExecutor(stream);
+            stopWatch.beginAggregation();
+            List<QueryRun> runs = executor.run();
+            stopWatch.beginFormatting();
+            for (QueryRun task : runs) {
+                Table table = task.getTable();
+                FilteredType type = table.getFields().getFirst().type;
+                configuration.title = type.getLabel();
+                TableRenderer renderer = new TableRenderer(configuration, table , task.getQuery());
+                renderer.render();
+                out.println();
+            }
+            stopWatch.finish();
+            if (configuration.verbose) {
+                out.println();
+                out.println("Execution: " + stopWatch.toString());
+            }
+            printTimespan();
+            return true;
+        }
+        if (text.equals("types")) {
+            QueryPrinter qp = new QueryPrinter(configuration, stream);
+            qp.execute("SHOW EVENTS");
+            return true;
+        }
+        List<ViewConfiguration> views = ViewFile.getDefault().getViewConfigurations();
+        if (text.equalsIgnoreCase("all-views")) {
+            stopWatch.beginQueryValidation();
+            List<Query> queries = new ArrayList<>();
+            for (ViewConfiguration view : views) {
+                queries.add(new Query(view.query()));
+            }
+            QueryExecutor executor = new QueryExecutor(stream, queries);
+            int index = 0;
+            stopWatch.beginAggregation();
+            List<QueryRun> runs = executor.run();
+            stopWatch.beginFormatting();
+            for (QueryRun run : runs) {
+                printView(views.get(index++), run);
+            }
+            stopWatch.finish();
+            if (configuration.verbose) {
+                out.println();
+                out.println("Execution: " + stopWatch.toString());
+            }
+            printTimespan();
+            printViewTypeRelation(views, executor.getEventTypes());
+            return true;
+        }
+        for (ViewConfiguration view : views) {
+            if (view.name().equalsIgnoreCase(text)) {
+                stopWatch.beginQueryValidation();
+                Query q = new Query(view.query());
+                QueryExecutor executor = new QueryExecutor(stream, q);
+                stopWatch.beginAggregation();
+                QueryRun run = executor.run().getFirst();
+                stopWatch.beginFormatting();
+                printView(view, run);
+                stopWatch.finish();
+                if (configuration.verbose) {
+                    out.println();
+                    out.println("Execution: " + stopWatch.toString());
+                    out.println();
+                }
+                printTimespan();
+                return true;
+            }
+        }
+        return false;
+    }
+
+    void printViewTypeRelation(List<ViewConfiguration> views, List<EventType> eventTypes) throws ParseException {
+        if (!configuration.verbose) {
+            return;
+        }
+        out.println();
+        out.println("Event types and views");
+        out.println();
+        Map<String, Set<String>> viewMap = new HashMap<>();
+        for (EventType type : eventTypes) {
+            viewMap.put(type.getName(), new LinkedHashSet<>());
+        }
+        for (ViewConfiguration view : views) {
+            Query query = new Query(view.query());
+            if (query.from.getFirst().name().equals("*")) {
+                continue;
+            }
+            QueryResolver resolver = new QueryResolver(query, eventTypes);
+            try {
+                resolver.resolve();
+            } catch (QueryException e) {
+               throw new InternalError(e);
+            }
+            for (FilteredType ft: resolver.getFromTypes()) {
+                Set<String> list = viewMap.get(ft.getName());
+                list.add(view.name());
+            }
+        }
+        List<String> names = new ArrayList<>(viewMap.keySet());
+        Collections.sort(names);
+        for (String name : names) {
+            Set<String> vs = viewMap.get(name);
+            StringJoiner sj = new StringJoiner(", ");
+            vs.stream().forEach(sj::add);
+            out.println(String.format("%-35s %s", name, sj.toString()));
+        }
+    }
+
+    private void printTimespan() {
+        if (configuration.startTime != null) {
+            String start = ValueFormatter.formatTimestamp(configuration.startTime);
+            String end = ValueFormatter.formatTimestamp(configuration.endTime);
+            out.println();
+            out.println("Timespan: " + start + " - " + end);
+        }
+    }
+
+    private void printView(ViewConfiguration section, QueryRun queryRun)
+            throws UserDataException, ParseException, UserSyntaxException {
+        if (!queryRun.getSyntaxErrors().isEmpty()) {
+            throw new UserSyntaxException(queryRun.getSyntaxErrors().getFirst());
+        }
+        if (!queryRun.getMetadataErrors().isEmpty()) {
+            // Recording doesn't have the event,
+            out.println(queryRun.getMetadataErrors().getFirst());
+            out.println("Missing event found for " + section.name());
+            return;
+        }
+        Table table = queryRun.getTable();
+        configuration.title = section.getLabel();
+        long width = 0;
+        if (section.getForm() != null) {
+            FormRenderer renderer = new FormRenderer(configuration, table);
+            renderer.render();
+            width = renderer.getWidth();
+        }
+        if (section.getTable() != null) {
+            Query query = queryRun.getQuery();
+            TableRenderer renderer = new TableRenderer(configuration, table, query);
+            renderer.render();
+            width = renderer.getWidth();
+        }
+        if (width != 0 && configuration.verbose && !queryRun.getTable().isEmpty()) {
+            out.println();
+            Query query = queryRun.getQuery();
+            printQuery(new LineBuilder(out, width), query.toString());
+        }
+    }
+
+    private void printQuery(LineBuilder lb, String query) {
+        char[] separators = {'=', ','};
+        try (Tokenizer tokenizer = new Tokenizer(query, separators)) {
+            while (tokenizer.hasNext()) {
+                lb.append(nextText(tokenizer));
+            }
+            lb.out.println();
+        } catch (ParseException pe) {
+            throw new InternalError("Could not format already parsed query", pe);
+        }
+    }
+
+    private String nextText(Tokenizer tokenizer) throws ParseException {
+        if (tokenizer.peekChar() == '\'') {
+            return "'" + tokenizer.next() + "'";
+        } else {
+            return tokenizer.next();
+        }
+    }
+
+    // Helper class for line breaking
+    private static class LineBuilder implements Closeable {
+        private final Output out;
+        private final long width;
+        private int position;
+        LineBuilder(Output out, long width) {
+            this.out = out;
+            this.width = width;
+        }
+
+        public void append(String text) {
+            String original = text;
+            if (!text.equals(",") && !text.equals(";") && position != 0) {
+                text = " " + text;
+            }
+            if (text.length() > width) {
+                print(text);
+                return;
+            }
+
+            if (text.length() + position > width) {
+                out.println();
+                position = 0;
+                text = original;
+            }
+            out.print(text);
+            position += text.length();
+        }
+
+        private void print(String s) {
+            for (int i = 0; i < s.length(); i++) {
+                if (position % width == 0 && position != 0) {
+                    out.println();
+                }
+                out.print(s.charAt(i));
+                position++;
+            }
+        }
+
+        @Override
+        public void close() throws IOException {
+            out.println();
+        }
+    }
+
+    public static List<String> getAvailableViews() {
+        List<String> list = new ArrayList<>();
+        list.add("Java virtual machine views:");
+        list.add(new Columnizer(getViewList("jvm"), 3).toString());
+        list.add("");
+        list.add("Environment views:");
+        list.add(new Columnizer(getViewList("environment"), 3).toString());
+        list.add("");
+        list.add("Application views:");
+        list.add(new Columnizer(getViewList("application"), 3).toString());
+        list.add("");
+        return list;
+    }
+
+    private static List<String> getViewList(String selection) {
+        List<String> names = new ArrayList<>();
+        for (var view : ViewFile.getDefault().getViewConfigurations()) {
+            String category = view.category();
+            if (selection.equals(category)) {
+                names.add(view.name());
+            }
+        }
+        return names;
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/query/view.ini

@@ -0,0 +1,576 @@
+;
+; Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+; DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+;
+; This code is free software; you can redistribute it and/or modify it
+; under the terms of the GNU General Public License version 2 only, as
+; published by the Free Software Foundation.  Oracle designates this
+; particular file as subject to the "Classpath" exception as provided
+; by Oracle in the LICENSE file that accompanied this code.
+;
+; This code is distributed in the hope that it will be useful, but WITHOUT
+; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+; version 2 for more details (a copy is included in the LICENSE file that
+; accompanied this code).
+;
+; You should have received a copy of the GNU General Public License version
+; 2 along with this work; if not, write to the Free Software Foundation,
+; Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+;
+; Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+; or visit www.oracle.com if you need additional information or have any
+; questions.
+;
+
+[environment.active-recordings]
+label = "Active Recordings"
+table = "COLUMN 'Start', 'Duration', 'Name',
+                'Destination', 'Max Age', 'Max Size'
+         FORMAT none, none, none,
+                cell-height:5, none, none
+         SELECT LAST(recordingStart), LAST(recordingDuration), LAST(name),
+                LAST(destination), LAST(maxAge), LAST(maxSize)
+         FROM ActiveRecording
+         GROUP BY id"
+
+[environment.active-settings]
+label = "Active Settings"
+table = "COLUMN 'Event Type', 'Enabled', 'Threshold',
+                'Stack Trace','Period','Cutoff', 'Throttle'
+         FORMAT none, missing:whitespace, missing:whitespace, missing:whitespace,
+                missing:whitespace, missing:whitespace, missing:whitespace
+         SELECT E.id, LAST_BATCH(E.value), LAST_BATCH(T.value),
+                LAST_BATCH(S.value), LAST_BATCH(P.value),
+                LAST_BATCH(C.value), LAST_BATCH(U.value)
+         FROM
+                ActiveSetting AS E,
+                ActiveSetting AS T,
+                ActiveSetting AS S,
+                ActiveSetting AS P,
+                ActiveSetting AS C,
+                ActiveSetting AS U
+         WHERE
+               E.name = 'enabled' AND
+               T.name = 'threshold' AND
+               S.name = 'stackTrace' AND
+               P.name = 'period' AND
+               C.name = 'cutoff' AND
+               U.name = 'throttle'
+         GROUP BY
+                 id
+         ORDER BY
+                 E.id"
+
+[application.allocation-by-class]
+label = "Allocation by Class"
+table = "COLUMN 'Object Type', 'Allocation Pressure'
+         FORMAT none, normalized
+         SELECT objectClass AS O, SUM(weight) AS W
+         FROM ObjectAllocationSample GROUP BY O ORDER BY W DESC LIMIT 25"
+
+[application.allocation-by-thread]
+label = "Allocation by Thread"
+table = "COLUMN 'Thread', 'Allocation Pressure'
+         FORMAT none, normalized
+         SELECT eventThread AS T, SUM(weight) AS W
+         FROM ObjectAllocationSample GROUP BY T ORDER BY W DESC LIMIT 25"
+
+[application.allocation-by-site]
+label = "Allocation by Site"
+table = "COLUMN 'Method', 'Allocation Pressure'
+         FORMAT none, normalized
+         SELECT stackTrace.topFrame AS S, SUM(weight) AS W
+         FROM ObjectAllocationSample
+         GROUP BY S
+         ORDER BY W DESC LIMIT 25"
+
+[application.class-loaders]
+label = "Class Loaders"
+table = "FORMAT missing:null-bootstrap, none, none
+         SELECT classLoader, LAST(hiddenClassCount),
+         LAST(classCount) AS C
+         FROM ClassLoaderStatistics
+         GROUP BY classLoader ORDER BY C DESC";
+
+[jvm.class-modifications]
+label = "Class Modifications"
+table = "COLUMN 'Time', 'Requested By', 'Operation', 'Classes'
+         SELECT duration, stackTrace.topApplicationFrame, eventType.label, classCount
+         FROM RetransformClasses, RedefineClasses
+         GROUP BY redefinitionId
+         ORDER BY duration DESC"
+
+[jvm.compiler-configuration]
+label = "Compiler Configuration"
+form = "SELECT LAST(threadCount), LAST(dynamicCompilerThreadCount), LAST(tieredCompilation)
+        FROM CompilerConfiguration"
+
+[jvm.compiler-statistics]
+label = "Compiler Statistics"
+form = "SELECT LAST(compileCount), LAST(peakTimeSpent), LAST(totalTimeSpent),
+               LAST(bailoutCount), LAST(osrCompileCount),
+               LAST(standardCompileCount), LAST(osrBytesCompiled),
+               LAST(standardBytesCompiled), LAST(nmethodsSize),
+               LAST(nmethodCodeSize) FROM CompilerStatistics"
+
+[jvm.compiler-phases]
+label = "Concurrent Compiler Phases"
+table = "COLUMN 'Level', 'Phase', 'Average',
+                'P95', 'Longest', 'Count',
+                'Total'
+         SELECT phaseLevel AS L, phase AS P, AVG(duration),
+                P95(duration),  MAX(duration), COUNT(*),
+                SUM(duration) AS S
+         FROM CompilerPhase
+         GROUP BY P ORDER BY L ASC, S DESC"
+
+[environment.container-configuration]
+label = "Container Configuration"
+form = "SELECT LAST(containerType), LAST(cpuSlicePeriod), LAST(cpuQuota), LAST(cpuShares),
+               LAST(effectiveCpuCount), LAST(memorySoftLimit), LAST(memoryLimit),
+               LAST(swapMemoryLimit), LAST(hostTotalMemory)
+               FROM ContainerConfiguration"
+
+[environment.container-cpu-usage]
+label = "Container CPU Usage"
+form = "SELECT LAST(cpuTime), LAST(cpuUserTime), LAST(cpuSystemTime) FROM ContainerCPUUsage"
+
+[environment.container-memory-usage]
+label = "Container Memory Usage"
+form = "SELECT LAST(memoryFailCount), LAST(memoryUsage), LAST(swapMemoryUsage) FROM ContainerMemoryUsage"
+
+[environment.container-io-usage]
+label = "Container I/O Usage"
+form = "SELECT LAST(serviceRequests), LAST(dataTransferred) FROM ContainerIOUsage"
+
+[environment.container-cpu-throttling]
+label = "Container CPU Throttling"
+form = "SELECT LAST(cpuElapsedSlices), LAST(cpuThrottledSlices), LAST(cpuThrottledTime) FROM ContainerCPUThrottling"
+
+[application.contention-by-thread]
+label = "Contention by Thread"
+table = "COLUMN 'Thread', 'Count', 'Avg', 'P90', 'Max.'
+         SELECT eventThread, COUNT(*), AVG(duration), P90(duration), MAX(duration) AS M
+         FROM JavaMonitorEnter GROUP BY eventThread ORDER BY M"
+
+[application.contention-by-class]
+label = "Contention by Lock Class"
+table = "COLUMN 'Lock Class', 'Count', 'Avg.', 'P90', 'Max.'
+         SELECT monitorClass, COUNT(*), AVG(duration), P90(duration), MAX(duration) AS M
+         FROM JavaMonitorEnter GROUP BY monitorClass ORDER BY M"
+
+[application.contention-by-site]
+label = "Contention by Site"
+table = "COLUMN 'StackTrace', 'Count', 'Avg.', 'Max.'
+         SELECT stackTrace AS S, COUNT(*), AVG(duration), MAX(duration) AS M
+         FROM JavaMonitorEnter GROUP BY S ORDER BY M"
+
+[application.contention-by-address]
+label = "Contention by Monitor Address"
+table = "COLUMN 'Monitor Address', 'Class', 'Threads', 'Max Duration'
+         SELECT address, FIRST(monitorClass), UNIQUE(*), MAX(duration) AS M
+         FROM JavaMonitorEnter
+         GROUP BY monitorClass ORDER BY M"
+
+[environment.cpu-information]
+label ="CPU Information"
+form = "SELECT cpu, sockets, cores, hwThreads, description FROM CPUInformation"
+
+[environment.cpu-load]
+label = "CPU Load Statistics"
+form = "COLUMN
+        'JVM User (Minimum)',
+        'JVM User (Average)',
+        'JVM User (Maximum)',
+        'JVM System (Minimum)',
+        'JVM System (Average)',
+        'JVM System (Maximum)',
+        'Machine Total (Minimum)',
+        'Machine Total (Average)',
+        'Machine Total (Maximum)'
+        SELECT MIN(jvmUser), AVG(jvmUser), MAX(jvmUser),
+               MIN(jvmSystem), AVG(jvmSystem), MAX(jvmSystem),
+               MIN(machineTotal), AVG(machineTotal), MAX(machineTotal)
+               FROM CPULoad"
+
+[environment.cpu-load-samples]
+label = "CPU Load"
+table = "SELECT startTime, jvmUser, jvmSystem, machineTotal FROM CPULoad"
+
+[environment.cpu-tsc]
+label ="CPU Time Stamp Counter"
+form = "SELECT LAST(fastTimeAutoEnabled), LAST(fastTimeEnabled),
+               LAST(fastTimeFrequency), LAST(osFrequency)
+        FROM CPUTimeStampCounter"
+
+[jvm.deoptimizations-by-reason]
+label = "Deoptimization by Reason"
+table = "SELECT reason, COUNT(reason) AS C
+         FROM Deoptimization GROUP BY reason ORDER BY C DESC"
+
+[jvm.deoptimizations-by-site]
+label = "Deoptimization by Site"
+table = "SELECT method, lineNumber, bci, COUNT(reason) AS C
+         FROM Deoptimization GROUP BY method ORDER BY C DESC"
+
+[environment.events-by-count]
+label = "Event Types by Count"
+table = "SELECT eventType.label AS E, COUNT(*) AS C FROM * GROUP BY E ORDER BY C DESC"
+
+[environment.events-by-name]
+label = "Event Types by Name"
+table = "SELECT eventType.label AS E, COUNT(*) AS C FROM * GROUP BY E ORDER BY E ASC"
+
+[environment.environment-variables]
+label = "Environment Variables"
+table = "FORMAT none, cell-height:20
+         SELECT LAST(key) AS K, LAST(value)
+         FROM InitialEnvironmentVariable GROUP BY key ORDER BY K"
+
+[application.exception-count]
+label ="Exception Statistics"
+form = "COLUMN 'Exceptions Thrown' SELECT DIFF(throwables) FROM ExceptionStatistics"
+
+[application.exception-by-type]
+label ="Exceptions by Type"
+table = "COLUMN 'Class', 'Count'
+         SELECT thrownClass AS T, COUNT(thrownClass) AS C
+         FROM JavaErrorThrow, JavaExceptionThrow GROUP BY T ORDER BY C DESC"
+
+[application.exception-by-message]
+label ="Exceptions by Message"
+table = "COLUMN 'Message', 'Count'
+         SELECT message AS M, COUNT(message) AS C
+         FROM JavaErrorThrow, JavaExceptionThrow GROUP BY M ORDER BY C DESC"
+
+[application.exception-by-site]
+label ="Exceptions by Site"
+table = "COLUMN 'Method', 'Count'
+         SELECT stackTrace.notInit AS S, COUNT(startTime) AS C
+         FROM JavaErrorThrow, JavaExceptionThrow GROUP BY S ORDER BY C DESC"
+
+[application.file-reads-by-path]
+label = "File Reads by Path"
+table = "COLUMN 'Path', 'Reads', 'Total Read'
+         FORMAT cell-height:5, none, none
+         SELECT path, COUNT(*), SUM(bytesRead) AS S FROM FileRead
+         GROUP BY path ORDER BY S DESC"
+
+[application.file-writes-by-path]
+label = "File Writes by Path"
+table = "COLUMN 'Path', 'Writes', 'Total Written'
+         FORMAT cell-height:5, none, none
+         SELECT path, COUNT(bytesWritten), SUM(bytesWritten) AS S FROM FileWrite
+         GROUP BY path ORDER BY S DESC"
+
+[application.finalizers]
+label = "Finalizers"
+table = "SELECT finalizableClass, LAST_BATCH(objects) AS O, LAST_BATCH(totalFinalizersRun)
+         FROM FinalizerStatistics GROUP BY finalizableClass ORDER BY O DESC"
+
+[jvm.gc]
+label = "Garbage Collections"
+table = "COLUMN 'Start', 'GC ID', 'Type', 'Heap Before GC', 'Heap After GC', 'Longest Pause'
+         FORMAT none, none, missing:Unknown, none, none, none
+         SELECT G.startTime, gcId, [Y|O].eventType.label,
+                B.heapUsed, A.heapUsed, longestPause
+         FROM
+                GarbageCollection AS G,
+                GCHeapSummary AS B,
+                GCHeapSummary AS A,
+                OldGarbageCollection AS O,
+                YoungGarbageCollection AS Y
+         WHERE B.when = 'Before GC' AND A.when = 'After GC'
+         GROUP BY gcId ORDER BY G.startTime"
+
+[jvm.gc-concurrent-phases]
+label = "Concurrent GC Phases"
+table = "COLUMN 'Name', 'Average', 'P95',
+                'Longest', 'Count', 'Total'
+         SELECT name,  AVG(duration),  P95(duration),
+                MAX(duration), COUNT(*), SUM(duration) AS S
+         FROM   GCPhaseConcurrent, GCPhaseConcurrentLevel1
+         GROUP BY name ORDER BY S"
+
+[jvm.gc-configuration]
+label = 'GC Configuration'
+form = "COLUMN 'Young GC', 'Old GC',
+               'Parallel GC Threads','Concurrent GC Threads',
+               'Dynamic GC Threads', 'Concurrent Explicit GC',
+               'Disable Explicit GC', 'Pause Target',
+               'GC Time Ratio'
+        SELECT LAST(youngCollector), LAST(oldCollector),
+               LAST(parallelGCThreads), LAST(concurrentGCThreads),
+               LAST(usesDynamicGCThreads), LAST(isExplicitGCConcurrent),
+               LAST(isExplicitGCDisabled), LAST(pauseTarget),
+               LAST(gcTimeRatio)
+        FROM   GCConfiguration"
+
+[jvm.gc-references]
+label = "GC References"
+table = "COLUMN 'Time', 'GC ID', 'Soft Ref.', 'Weak Ref.', 'Phantom Ref.', 'Final Ref.', 'Total Count'
+         SELECT G.startTime, G.gcId, S.count, W.count, P.count, F.count, SUM(G.count)
+         FROM GCReferenceStatistics AS S,
+              GCReferenceStatistics AS W,
+              GCReferenceStatistics AS P,
+              GCReferenceStatistics AS F,
+              GCReferenceStatistics AS G
+         WHERE S.type = 'Soft reference' AND
+               W.type = 'Weak reference' AND
+               P.type = 'Phantom reference' AND
+               F.type = 'Final reference'
+         GROUP BY gcId ORDER By G.gcId ASC"
+
+[jvm.gc-pause-phases]
+label = "GC Pause Phases"
+table = "COLUMN 'Type', 'Name', 'Average',
+                'P95', 'Longest', 'Count', 'Total'
+         SELECT eventType.label AS T, name,  AVG(duration),
+                P95(duration), MAX(duration), COUNT(*), SUM(duration) AS S
+         FROM   GCPhasePause, GCPhasePauseLevel1, GCPhasePauseLevel2,
+                GCPhasePauseLevel3, GCPhasePauseLevel4 GROUP BY name
+         ORDER BY T ASC, S"
+
+[jvm.gc-pauses]
+label = "GC Pauses"
+form = "COLUMN 'Total Pause Time','Number of Pauses', 'Minimum Pause Time',
+               'Median Pause Time', 'Average Pause Time', 'P90 Pause Time',
+               'P95 Pause Time', 'P99 Pause Time', 'P99.9% Pause Time',
+               'Maximum Pause Time'
+        SELECT SUM(duration), COUNT(duration), MIN(duration),
+               MEDIAN(duration), AVG(duration), P90(duration),
+               P95(duration), P99(duration), P999(duration),
+               MAX(duration)
+        FROM GCPhasePause"
+
+[jvm.gc-allocation-trigger]
+label = "GC Allocation Trigger"
+table = "COLUMN 'Trigger Method (Non-JDK)', 'Count', 'Total Requested'
+         SELECT stackTrace.topApplicationFrame AS S, COUNT(*), SUM(size)
+         FROM AllocationRequiringGC GROUP BY S"
+
+[jvm.gc-cpu-time]
+label = "GC CPU Time"
+form = "COLUMN 'GC User Time', 'GC System Time',
+               'GC Wall Clock Time', 'Total Time',
+               'GC Count'
+        SELECT SUM(userTime), SUM(systemTime),
+               SUM(realTime), DIFF(startTime), COUNT(*)
+        FROM GCCPUTime"
+
+[jvm.heap-configuration]
+label = "Heap Configuration"
+form = "SELECT LAST(initialSize), LAST(minSize), LAST(maxSize),
+               LAST(usesCompressedOops), LAST(compressedOopsMode)
+               FROM GCHeapConfiguration"
+
+[application.hot-methods]
+label = "Java Methods that Executes the Most"
+table = "COLUMN 'Method', 'Samples', 'Percent'
+         FORMAT none, none, normalized
+         SELECT stackTrace.topFrame AS T, COUNT(*), COUNT(*)
+         FROM ExecutionSample GROUP BY T LIMIT 25"
+
+[environment.jvm-flags]
+label = "Command Line Flags"
+table = "SELECT name AS N, LAST(value)
+         FROM IntFlag, UnsignedIntFlag, BooleanFlag,
+         LongFlag, UnsignedLongFlag,
+         DoubleFlag, StringFlag,
+         IntFlagChanged, UnsignedIntFlagChanged, BooleanFlagChanged,
+         LongFlagChanged, UnsignedLongFlagChanged,
+         DoubleFlagChanged, StringFlagChanged
+         GROUP BY name ORDER BY name ASC"
+
+[jvm.jvm-information]
+label = "JVM Information"
+form = "COLUMN
+               'PID', 'VM Start', 'Name', 'Version',
+               'VM Arguments', 'Program Arguments'
+        SELECT LAST(pid), LAST(jvmStartTime), LAST(jvmName), LAST(jvmVersion),
+               LAST(jvmArguments), LAST(javaArguments) FROM JVMInformation"
+
+[application.latencies-by-type]
+label = "Latencies by Type"
+table = "COLUMN 'Event Type', 'Count', 'Average', 'P 99', 'Longest', 'Total'
+         SELECT eventType.label AS T, COUNT(*), AVG(duration),  P99(duration), MAX(duration), SUM(duration)
+         FROM JavaMonitorWait, JavaMonitorEnter, ThreadPark, ThreadSleep,
+         SocketRead, SocketWrite, FileWrite, FileRead GROUP BY T"
+
+[application.memory-leaks-by-class]
+label = "Memory Leak Candidates by Class"
+table = "COLUMN 'Alloc. Time', 'Object Class', 'Object Age', 'Heap Usage'
+         SELECT LAST_BATCH(allocationTime), LAST_BATCH(object.type), LAST_BATCH(objectAge),
+         LAST_BATCH(lastKnownHeapUsage) FROM OldObjectSample GROUP BY object.type ORDER BY allocationTime"
+
+[application.memory-leaks-by-site]
+label = "Memory Leak Candidates by Site"
+table = "COLUMN 'Alloc. Time', 'Application Method', 'Object Age', 'Heap Usage'
+         SELECT LAST_BATCH(allocationTime), LAST_BATCH(stackTrace.topApplicationFrame), LAST_BATCH(objectAge),
+         LAST_BATCH(lastKnownHeapUsage) FROM OldObjectSample GROUP BY stackTrace.topApplicationFrame ORDER BY allocationTime"
+
+[application.modules]
+label = "Modules"
+table = "SELECT LAST(source.name) AS S FROM ModuleRequire GROUP BY source.name ORDER BY S"
+
+[application.monitor-inflation]
+label = "Monitor Inflation"
+table = "SELECT stackTrace, monitorClass, COUNT(*), SUM(duration) AS S
+         FROM jdk.JavaMonitorInflate GROUP BY stackTrace, monitorClass ORDER BY S"
+
+[environment.native-libraries]
+label = "Native Libraries"
+table = "FORMAT cell-height:2, none, none
+         SELECT name AS N, baseAddress, topAddress FROM NativeLibrary GROUP BY name ORDER BY N"
+
+[jvm.native-memory-committed]
+label = "Native Memory Committed"
+table = "COLUMN 'Memory Type', 'First Observed', 'Average', 'Last Observed', 'Maximum'
+         SELECT type, FIRST(committed), AVG(committed), LAST(committed), MAX(committed) AS M
+         FROM NativeMemoryUsage GROUP BY type ORDER BY M DESC"
+
+[jvm.native-memory-reserved]
+label = "Native Memory Reserved"
+table = "COLUMN 'Memory Type', 'First Observed', 'Average', 'Last Observed', 'Maximum'
+         SELECT type, FIRST(reserved), AVG(reserved), LAST(reserved), MAX(reserved) AS M
+         FROM NativeMemoryUsage GROUP BY type ORDER BY M DESC"
+
+[application.native-methods]
+label = "Waiting or Executing Native Methods"
+table = "COLUMN 'Method', 'Samples', 'Percent'
+         FORMAT none, none, normalized
+         SELECT stackTrace.topFrame AS T, COUNT(*), COUNT(*)
+         FROM NativeMethodSample GROUP BY T"
+
+[environment.network-utilization]
+label = "Network Utilization"
+table = "SELECT networkInterface, AVG(readRate), MAX(readRate), AVG(writeRate), MAX(writeRate)
+         FROM NetworkUtilization GROUP BY networkInterface"
+
+[application.object-statistics]
+label = "Objects Occupying More than 1%"
+table = "COLUMN 'Class', 'Count', 'Heap Space', 'Increase'
+         SELECT
+          LAST_BATCH(objectClass), LAST_BATCH(count),
+          LAST_BATCH(totalSize), DIFF(totalSize)
+         FROM ObjectCountAfterGC, ObjectCount
+         GROUP BY objectClass
+         ORDER BY totalSize DESC"
+
+[application.pinned-threads]
+label = "Pinned Virtual Threads"
+table = "COLUMN 'Method', 'Pinned Count',  'Longest Pinning', 'Total Time Pinned'
+         SELECT stackTrace.topApplicationFrame AS S, COUNT(*),
+                MAX(duration), SUM(duration) AS T FROM VirtualThreadPinned
+         GROUP BY S
+         ORDER BY T DESC"
+
+[application.thread-count]
+label ="Java Thread Statistics"
+table = "SELECT * FROM JavaThreadStatistics"
+
+[environment.recording]
+label = "Recording Information"
+form = "COLUMN 'Event Count', 'First Recorded Event', 'Last Recorded Event',
+                 'Length of Recorded Events', 'Dump Reason'
+        SELECT   COUNT(startTime), FIRST(startTime), LAST(startTime),
+                 DIFF(startTime), LAST(jdk.Shutdown.reason)
+        FROM *"
+
+[jvm.safepoints]
+label = "Safepoints"
+table = "COLUMN  'Start Time', 'Duration',
+                   'State Syncronization', 'Cleanup',
+                   'JNI Critical Threads', 'Total Threads'
+         SELECT    B.startTime,  DIFF([B|E].startTime),
+                   S.duration, C.duration,
+                   jniCriticalThreadCount, totalThreadCount
+         FROM SafepointBegin AS B, SafepointEnd AS E,
+              SafepointCleanup AS C, SafepointStateSynchronization AS S
+         GROUP BY safepointId ORDER BY B.startTime"
+
+[jvm.longest-compilations]
+label = "Longest Compilations"
+table = "SELECT startTime, duration AS D, method, compileLevel, succeded
+         FROM Compilation ORDER BY D LIMIT 25"
+
+[application.longest-class-loading]
+label = "Longest Class Loading"
+table = "COLUMN 'Time', 'Loaded Class', 'Load Time'
+         SELECT startTime,loadedClass, duration AS D
+         FROM ClassLoad ORDER BY D DESC LIMIT 25"
+
+[environment.system-properties]
+label = "System Properties at Startup"
+table = "FORMAT none, cell-height:25
+        SELECT key AS K, value FROM InitialSystemProperty GROUP BY key ORDER by K"
+
+[application.socket-writes-by-host]
+label = "Socket Writes by Host"
+table = "COLUMN 'Host', 'Writes', 'Total Written'
+         FORMAT cell-height:2, none, none
+         SELECT host, COUNT(*), SUM(bytesWritten) AS S FROM SocketWrite
+         GROUP BY host ORDER BY S DESC"
+
+[application.socket-reads-by-host]
+label = "Socket Reads by Host"
+table = "COLUMN 'Host', 'Reads', 'Total Read'
+         FORMAT cell-height:2, none, none
+         SELECT host, COUNT(*), SUM(bytesRead) AS S FROM SocketRead
+         GROUP BY host ORDER BY S DESC"
+
+[environment.system-information]
+label = "System Information"
+form = "COLUMN 'Total Physical Memory Size', 'OS Version', 'CPU Type',
+                 'Number of Cores', 'Number of Hardware Threads',
+                 'Number of Sockets', 'CPU Description'
+        SELECT LAST(totalSize), LAST(osVersion), LAST(cpu),
+               LAST(cores), LAST(hwThreads),
+               LAST(sockets), LAST(description)
+        FROM CPUInformation, PhysicalMemory, OSInformation"
+
+[environment.system-processes]
+label = "System Processes"
+table = "COLUMN 'First Observed', 'Last Observed', 'PID', 'Command Line'
+         SELECT FIRST(startTime), LAST(startTime),
+                FIRST(pid), FIRST(commandLine)
+         FROM SystemProcess GROUP BY pid"
+
+[jvm.tlabs]
+label = "Thread Local Allocation Buffers"
+form = "COLUMN 'Inside TLAB Count', 'Inside TLAB Minimum Size', 'Inside TLAB Average Size',
+               'Inside TLAB Maximum Size', 'Inside TLAB Total Allocation',
+               'Outside TLAB Count',  'OutSide TLAB Minimum Size', 'Outside TLAB Average Size',
+               'Outside TLAB Maximum Size', 'Outside TLAB Total Allocation'
+        SELECT  COUNT(I.tlabSize), MIN(I.tlabSize), AVG(I.tlabSize),
+                MAX(I.tlabSize), SUM(I.tlabSize),
+                COUNT(O.allocationSize), MIN(O.allocationSize), AVG(O.allocationSize),
+                MAX(O.allocationSize), SUM(O.allocationSize)
+        FROM ObjectAllocationInNewTLAB AS I, ObjectAllocationOutsideTLAB AS O"
+
+[application.thread-allocation]
+label = "Thread Allocation Statistics"
+table = "COLUMN 'Thread', 'Allocated', 'Percentage'
+         FORMAT none, none, normalized
+         SELECT thread, LAST(allocated), LAST(allocated) AS A FROM ThreadAllocationStatistics
+         GROUP BY thread ORDER BY A DESC"
+
+[application.thread-cpu-load]
+label = "Thread CPU Load"
+table = "COLUMN 'Thread', 'System', 'User'
+         SELECT eventThread AS E, LAST(system), LAST(user) AS U
+         FROM ThreadCPULoad GROUP BY E ORDER BY U DESC"
+
+[application.thread-start]
+label = "Platform Thread Start by Method"
+table = "COLUMN 'Start Time','Stack Trace', 'Thread', 'Duration'
+         SELECT S.startTime, S.stackTrace, eventThread, DIFF(startTime) AS D
+         FROM ThreadStart AS S, ThreadEnd AS E GROUP
+         by eventThread ORDER BY D DESC"
+
+[jvm.vm-operations]
+label = "VM Operations"
+table = "COLUMN 'VM Operation', 'Average Duration', 'Longest Duration', 'Count' , 'Total Duration'
+         SELECT operation,  AVG(duration), MAX(duration), COUNT(*), SUM(duration)
+         FROM jdk.ExecuteVMOperation GROUP BY operation"

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Assemble.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -38,6 +38,9 @@ import java.util.Collections;
 import java.util.Deque;
 import java.util.List;
 
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
+
 final class Assemble extends Command {
 
     @Override

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Command.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -40,6 +40,9 @@ import java.util.Collections;
 import java.util.Deque;
 import java.util.List;
 
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
+
 abstract class Command {
     public static final String title = "Tool for working with Flight Recorder files";
     private static final Command HELP = new Help();
@@ -48,6 +51,9 @@ abstract class Command {
     private static List<Command> createCommands() {
         List<Command> commands = new ArrayList<>();
         commands.add(new Print());
+        // Uncomment when developing new queries for the view command
+        // commands.add(new Query());
+        commands.add(new View());
         commands.add(new Configure());
         commands.add(new Metadata());
         commands.add(new Scrub());
@@ -170,6 +176,18 @@ abstract class Command {
         return false;
     }
 
+    protected int acceptInt(Deque<String> options, String text) throws UserSyntaxException {
+        if (options.size() < 1) {
+            throw new UserSyntaxException("missing integer value");
+        }
+        String t = options.remove();
+        try {
+            return Integer.parseInt(t);
+        } catch (NumberFormatException nfe) {
+            throw new UserSyntaxException("could not parse integer value " + t);
+        }
+    }
+
     protected void warnForWildcardExpansion(String option, String filter) throws UserDataException {
         // Users should quote their wildcards to avoid expansion by the shell
         try {

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Configure.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -46,6 +46,8 @@ import jdk.jfr.internal.jfc.model.JFCModelException;
 import jdk.jfr.internal.jfc.model.SettingsLog;
 import jdk.jfr.internal.jfc.model.UserInterface;
 import jdk.jfr.internal.jfc.model.XmlInput;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
 
 final class Configure extends Command {
     private final List<String> inputFiles = new ArrayList<>();

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Disassemble.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -43,6 +43,8 @@ import java.util.List;
 import jdk.jfr.internal.consumer.ChunkHeader;
 import jdk.jfr.internal.consumer.FileAccess;
 import jdk.jfr.internal.consumer.RecordingInput;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
 
 final class Disassemble extends Command {
 

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Filters.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -33,6 +33,7 @@ import java.util.function.Predicate;
 
 import jdk.jfr.EventType;
 import jdk.jfr.consumer.RecordedThread;
+import jdk.jfr.internal.util.UserSyntaxException;
 import jdk.jfr.consumer.RecordedEvent;
 
 /**

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Help.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,6 +29,9 @@ import java.io.PrintStream;
 import java.util.Deque;
 import java.util.List;
 
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
+
 final class Help extends Command {
 
     @Override

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Main.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,6 +29,9 @@ import java.util.ArrayDeque;
 import java.util.Arrays;
 import java.util.Deque;
 
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
+
 /**
  * Launcher class for the JDK_HOME\bin\jfr tool
  *
@@ -49,7 +52,7 @@ public final class Main {
             System.out.println();
             System.out.println(" java -XX:StartFlightRecording:filename=recording.jfr,duration=30s ... ");
             System.out.println();
-            System.out.println("A recording can also be started on already running Java Virtual Machine:");
+            System.out.println("A recording can also be started on an already running Java Virtual Machine:");
             System.out.println();
             System.out.println(" jcmd (to list available pids)");
             System.out.println(" jcmd <pid> JFR.start");
@@ -71,11 +74,13 @@ public final class Main {
             System.out.println();
             System.out.println(" jfr print --events " + q + "jdk.*" + q + " --stack-depth 64 recording.jfr");
             System.out.println();
+            System.out.println(" jfr view gc recording.jfr");
+            System.out.println();
+            System.out.println(" jfr view allocation-by-site recording.jfr");
+            System.out.println();
             System.out.println(" jfr summary recording.jfr");
             System.out.println();
-            System.out.println(" jfr metadata recording.jfr");
+            System.out.println(" jfr metadata");
-            System.out.println();
-            System.out.println(" jfr metadata --categories GC,Detailed");
             System.out.println();
             System.out.println("For more information about available commands, use 'jfr help'");
             System.exit(EXIT_OK);

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Metadata.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -44,6 +44,8 @@ import jdk.jfr.internal.PrivateAccess;
 import jdk.jfr.internal.Type;
 import jdk.jfr.internal.MetadataRepository;
 import jdk.jfr.internal.consumer.JdkJfrConsumer;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
 

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Print.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -35,6 +35,8 @@ import java.util.List;
 import java.util.function.Predicate;
 
 import jdk.jfr.EventType;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
 

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Query.java

@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.internal.tool;
+
+import java.io.IOException;
+import java.io.PrintStream;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Deque;
+import java.util.List;
+
+import jdk.jfr.consumer.EventStream;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.Output.BufferedPrinter;
+import jdk.jfr.internal.util.UserSyntaxException;
+import jdk.jfr.internal.query.QueryPrinter;
+import jdk.jfr.internal.query.Configuration.Truncate;
+import jdk.jfr.internal.query.Configuration;
+
+final class Query extends Command {
+    @Override
+    public String getName() {
+        return "query";
+    }
+
+    @Override
+    public String getDescription() {
+        return "Display event values in a recording file (.jfr) in a tabular format";
+    }
+
+    @Override
+    public void displayOptionUsage(PrintStream p) {
+                // 0123456789001234567890012345678900123456789001234567890012345678900123456789001234567890
+        p.println("  --verbose               Displays the symbolic column names");
+        p.println();
+        p.println("  --width <integer>       The width of the table. Default value depends on the query");
+        p.println();
+        p.println("  <query>                 Query, for example \"SELECT * FROM GarbageCollection\"");
+        p.println("                          See below for grammar.");
+        p.println();
+        p.println("  <file>                  Location of the recording file (.jfr)");
+        p.println();
+        p.println(QueryPrinter.getGrammarText());
+        p.println();
+        p.println("Example usage:");
+        p.println();
+        p.println(" $ jfr query \"SHOW EVENTS\" recording.jfr");
+        p.println();
+        p.println(" $ jfr query \"SHOW FIELDS ObjectAllocationSample\" recording.jfr");
+        p.println();
+        p.println(" $ jfr query --verbose \"SELECT * FROM ObjectAllocationSample\" recording.jfr");
+        p.println();
+        p.println(" $ jfr query --width 160 \"SELECT pid, path FROM SystemProcess\" recording.jfr");
+        p.println();
+        p.println(" $ jfr query \"SELECT stackTrace.topFrame AS T, SUM(weight)");
+        p.println("              FROM ObjectAllocationSample GROUP BY T\" recording.jfr");
+        p.println();
+        p.println("$ jfr JFR.query \"COLUMN 'Method', 'Percentage'");
+        p.println("                 FORMAT default, normalized;width:10");
+        p.println("                 SELECT stackTrace.topFrame AS T, COUNT(*) AS C");
+        p.println("                 GROUP BY T");
+        p.println("                 FROM ExecutionSample ORDER BY C DESC\" recording.jfr");
+        p.println();
+        p.println("$ jcmd <pid> JFR.query \"COLUMN 'Start', 'GC ID', 'Heap Before GC',");
+        p.println("                        'Heap After GC', 'Longest Pause'");
+        p.println("                        SELECT G.startTime, G.gcId, B.heapUsed,");
+        p.println("                             A.heapUsed, longestPause");
+        p.println("                        FROM GarbageCollection AS G,");
+        p.println("                             GCHeapSummary AS B,");
+        p.println("                             GCHeapSummary AS A");
+        p.println("                        WHERE B.when = 'Before GC' AND A.when = 'After GC'");
+        p.println("                        GROUP BY gcId");
+        p.println("                        ORDER BY G.startTime\" recording.jfr");
+   }
+
+    @Override
+    public List<String> getOptionSyntax() {
+        List<String> list = new ArrayList<>();
+        list.add("[--verbose] [--width <integer>] <query> <file>");
+        return list;
+    }
+
+    @Override
+    public void execute(Deque<String> options) throws UserSyntaxException, UserDataException {
+        Path file = getJFRInputFile(options);
+        int optionCount = options.size();
+        var configuration = new Configuration();
+        BufferedPrinter printer = new BufferedPrinter(System.out);
+        configuration.output = printer;
+        while (optionCount > 0) {
+            if (acceptSwitch(options, "--verbose")) {
+                configuration.verbose = true;
+                configuration.verboseHeaders = true;
+            }
+            if (acceptOption(options, "--truncate")) {
+                String mode = options.remove();
+                try {
+                    configuration.truncate = Truncate.valueOf(mode.toUpperCase());
+                } catch (IllegalArgumentException iae) {
+                    throw new UserSyntaxException("truncate must be 'beginning' or 'end'");
+                }
+            }
+            if (acceptOption(options, "--cell-height")) {
+                configuration.cellHeight = acceptInt(options, "cell-height");
+            }
+            if (acceptOption(options, "--width")) {
+                configuration.width = acceptInt(options, "width");
+            }
+            if (optionCount == 1) {
+                String query = options.pop();
+                try (EventStream stream = EventStream.openFile(file)) {
+                    QueryPrinter qp = new QueryPrinter(configuration, stream);
+                    qp.execute(query);
+                    printer.flush();
+                } catch (IOException ioe) {
+                    couldNotReadError(file, ioe);
+                }
+                return;
+            }
+            if (optionCount == options.size()) {
+                throw new UserSyntaxException("unknown option " + options.peek());
+            }
+            optionCount = options.size();
+        }
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Scrub.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -37,6 +37,8 @@ import java.util.function.Predicate;
 import jdk.jfr.EventType;
 import jdk.jfr.consumer.RecordedEvent;
 import jdk.jfr.consumer.RecordingFile;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
 
 final class Scrub extends Command {
 

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Summary.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -43,6 +43,8 @@ import jdk.jfr.internal.Type;
 import jdk.jfr.internal.consumer.ChunkHeader;
 import jdk.jfr.internal.consumer.FileAccess;
 import jdk.jfr.internal.consumer.RecordingInput;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
 
 final class Summary extends Command {
     private final DateTimeFormatter DATE_FORMAT = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss").withLocale(Locale.UK).withZone(ZoneOffset.UTC);

src/jdk.jfr/share/classes/jdk/jfr/internal/tool/View.java

@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.internal.tool;
+
+import java.io.IOException;
+import java.io.PrintStream;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Deque;
+import java.util.List;
+
+import jdk.jfr.consumer.EventStream;
+import jdk.jfr.internal.util.Columnizer;
+import jdk.jfr.internal.query.ViewPrinter;
+import jdk.jfr.internal.query.Configuration;
+import jdk.jfr.internal.query.Configuration.Truncate;
+import jdk.jfr.internal.util.UserDataException;
+import jdk.jfr.internal.util.UserSyntaxException;
+import jdk.jfr.internal.util.Output.BufferedPrinter;
+
+public final class View extends Command {
+    @Override
+    public String getName() {
+        return "view";
+    }
+
+    @Override
+    protected String getTitle() {
+        return "Display event values in a recording file (.jfr) in predefined views";
+    }
+
+    @Override
+    public String getDescription() {
+        return "Display events in a tabular format. See 'jfr help view' for details.";
+    }
+
+    @Override
+    public void displayOptionUsage(PrintStream stream) {
+        stream.println("  --verbose               Displays the query that makes up the view");
+        stream.println("");
+        stream.println("  --width <integer>       The width of the view in characters. Default value depends on the view");
+        stream.println("");
+        stream.println("  --truncate <mode>       How to truncate content that exceeds space in a table cell.");
+        stream.println("                          Mode can be 'beginning' or 'end'. Default value is 'end'");
+        stream.println("");
+        stream.println("  --cell-height <integer> Maximum number of rows in a table cell. Default value depends on the view");
+        stream.println("");
+        stream.println("  <view>                  Name of the view or event type to display. See list below for");
+        stream.println("                          available views");
+        stream.println("");
+        stream.println("  <file>                  Location of the recording file (.jfr)");
+        stream.println();
+        for (String line : ViewPrinter.getAvailableViews()) {
+            stream.println(line);
+        }
+        stream.println(" The <view> parameter can be an event type name. Use the 'jfr view types <file>'");
+        stream.println(" to see a list. To display all views, use 'jfr view all-views <file>'. To display");
+        stream.println(" all events, use 'jfr view all-events <file>'.");
+        stream.println();
+        stream.println("Example usage:");
+        stream.println();
+        stream.println(" jfr view gc recording.jfr");
+        stream.println();
+        stream.println(" jfr view --width 160 hot-methods recording.jfr");
+        stream.println();
+        stream.println(" jfr view --verbose allocation-by-class recording.jfr");
+        stream.println();
+        stream.println(" jfr view contention-by-site recording.jfr");
+        stream.println();
+        stream.println(" jfr view jdk.GarbageCollection recording.jfr");
+        stream.println();
+        stream.println(" jfr view --cell-height 10 ThreadStart recording.jfr");
+        stream.println();
+        stream.println(" jfr view --truncate beginning SystemProcess recording.jfr");
+        stream.println();
+    }
+
+    @Override
+    public List<String> getOptionSyntax() {
+        List<String> list = new ArrayList<>();
+        list.add("[--verbose]");
+        list.add("[--width <integer>");
+        list.add("[--truncate <mode>]");
+        list.add("[--cell-height <integer>]");
+        list.add("<view>");
+        list.add("<file>");
+        return list;
+    }
+
+    @Override
+    public void execute(Deque<String> options) throws UserSyntaxException, UserDataException {
+        Path file = getJFRInputFile(options);
+        int optionCount = options.size();
+        if (optionCount < 1) {
+            throw new UserSyntaxException("must specify a view or event type");
+        }
+        Configuration configuration = new Configuration();
+        BufferedPrinter printer = new BufferedPrinter(System.out);
+        configuration.output = printer;
+        while (true) {
+            if (acceptSwitch(options, "--verbose")) {
+                configuration.verbose = true;
+            }
+            if (acceptOption(options, "--truncate")) {
+                String mode = options.remove();
+                try {
+                    configuration.truncate = Truncate.valueOf(mode.toUpperCase());
+                } catch (IllegalArgumentException iae) {
+                    throw new UserSyntaxException("truncate must be 'beginning' or 'end'");
+                }
+            }
+            if (acceptOption(options, "--cell-height")) {
+                configuration.cellHeight = acceptInt(options, "cell-height");
+            }
+            if (acceptOption(options, "--width")) {
+                configuration.width = acceptInt(options, "width");
+            }
+            if (options.size() == 1) {
+                String view = options.pop();
+                try (EventStream stream = EventStream.openFile(file)) {
+                    ViewPrinter vp = new ViewPrinter(configuration, stream);
+                    vp.execute(view);
+                    printer.flush();
+                    return;
+                } catch (IOException ioe) {
+                    couldNotReadError(file, ioe);
+                }
+            }
+            System.out.println("count:" + optionCount);
+            System.out.println("size:" + options.size());
+            if (optionCount == options.size()) {
+                String peek = options.peek();
+                if (peek == null) {
+                    throw new UserSyntaxException("must specify option <view>");
+                }
+                throw new UserSyntaxException("unknown option " + peek);
+            }
+            optionCount = options.size();
+        }
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/util/Columnizer.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.util;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Class that creates a column-sorted list.
+ * <p>
+ * For example, the list: "Bison", "Dog", "Frog", Goldfish", "Kangaroo", "Ant",
+ * "Jaguar", "Cat", "Elephant", "Ibex" becomes:
+ * <pre>
+ *  Ant   Elephant Jaguar
+ *  Bison Frog     Kangaroo
+ *  Cat   Goldfish
+ *  Dog   Ibex"
+ * </pre>
+ */
+public final class Columnizer {
+    private static final class Column {
+        int maxWidth;
+        List<String> entries = new ArrayList<>();
+        public void add(String text) {
+            entries.add(text);
+            maxWidth = Math.max(maxWidth, text.length());
+        }
+    }
+    private final List<Column> columns = new ArrayList<>();
+
+    public Columnizer(List<String> texts, int columnCount) {
+        List<String> list = new ArrayList<>(texts);
+        Collections.sort(list);
+        int columnHeight = (list.size() + columnCount - 1) / columnCount;
+        int index = 0;
+        Column column = null;
+        for (String text : list) {
+            if (index % columnHeight == 0) {
+                column = new Column();
+                columns.add(column);
+            }
+            column.add(text);
+            index++;
+        }
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        int index = 0;
+        while (true) {
+            for (Column column : columns) {
+                if (index == column.entries.size()) {
+                    return sb.toString();
+                }
+                if (index != 0 && columns.getFirst() == column) {
+                    sb.append(System.lineSeparator());
+                }
+                String text = column.entries.get(index);
+                sb.append(" ");
+                sb.append(text);
+                sb.append(" ".repeat(column.maxWidth - text.length()));
+            }
+            index++;
+        }
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/util/Matcher.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.util;
+
+public final class Matcher {
+
+    /**
+     * Returns true if text matches pattern of characters, '*' and '?'
+     */
+    public static boolean match(String text, String pattern) {
+        if (pattern.length() == 0) {
+            // empty filter string matches if string is empty
+            return text.length() == 0;
+        }
+        if (pattern.charAt(0) == '*') { // recursive check
+            pattern = pattern.substring(1);
+            for (int n = 0; n <= text.length(); n++) {
+                if (match(text.substring(n), pattern))
+                    return true;
+            }
+        } else if (text.length() == 0) {
+            // empty string and non-empty filter does not match
+            return false;
+        } else if (pattern.charAt(0) == '?') {
+            // eat any char and move on
+            return match(text.substring(1), pattern.substring(1));
+        } else if (pattern.charAt(0) == text.charAt(0)) {
+            // eat chars and move on
+            return match(text.substring(1), pattern.substring(1));
+        }
+        return false;
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/util/Output.java

@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.util;
+
+import java.io.PrintStream;
+import java.util.ArrayList;
+import java.util.List;
+
+public interface Output {
+
+    public void println();
+
+    public void print(String s);
+
+    public void print(String s, Object... args);
+
+    default public void println(String s, Object... args) {
+        print(s, args);
+        println();
+    }
+
+    public void print(char c);
+
+    public static final class LinePrinter implements Output {
+        private final StringBuilder currentLine = new StringBuilder(80);
+        private final List<String> lines = new ArrayList<>();
+
+        @Override
+        public void println() {
+            lines.add(currentLine.toString());
+            currentLine.setLength(0);
+        }
+
+        @Override
+        public void print(String s) {
+            currentLine.append(s);
+        }
+
+        @Override
+        public void print(String s, Object... args) {
+            currentLine.append(args.length > 0 ? String.format(s, args) : s);
+        }
+
+        @Override
+        public void print(char c) {
+            currentLine.append(c);
+        }
+
+        public List<String> getLines() {
+            return lines;
+        }
+    }
+
+    public static final class BufferedPrinter implements Output {
+        private final StringBuilder buffer = new StringBuilder(100_000);
+        private final PrintStream out;
+
+        public BufferedPrinter(PrintStream out) {
+            this.out = out;
+        }
+
+        @Override
+        public void println() {
+            buffer.append(System.lineSeparator());
+            flushCheck();
+        }
+
+        @Override
+        public void print(String s) {
+            buffer.append(s);
+            flushCheck();
+        }
+
+        @Override
+        public void print(String s, Object... args) {
+            if (args.length > 0) {
+                buffer.append(String.format(s, args));
+            } else {
+                buffer.append(s);
+            }
+            flushCheck();
+        }
+
+        @Override
+        public void print(char c) {
+            buffer.append(c);
+            flush();
+        }
+
+        public void flush() {
+            out.print(buffer.toString());
+            buffer.setLength(0);
+        }
+
+        private void flushCheck() {
+            if (buffer.length() > 99_000) {
+                flush();
+            }
+        }
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/util/SpellChecker.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.util;
+
+import java.util.List;
+
+public final class SpellChecker {
+    public static String check(String name, List<String> alternatives) {
+        for (String expected : alternatives) {
+            String s = name.toLowerCase();
+            int lengthDifference = expected.length() - s.length();
+            boolean spellingError = false;
+            if (lengthDifference == 0) {
+                if (expected.equals(s)) {
+                    spellingError = true; // incorrect case, or we wouldn't be here
+                } else {
+                    if (s.length() < 6) {
+                        spellingError = diff(expected, s) < 2; // one incorrect letter
+                    } else {
+                        spellingError = diff(expected, s) < 3; // two incorrect letter
+                    }
+                }
+            }
+            if (lengthDifference == 1) {
+                spellingError = inSequence(expected, s); // missing letter
+            }
+            if (lengthDifference == -1) {
+                spellingError = inSequence(s, expected); // additional letter
+            }
+            if (spellingError) {
+                return expected;
+            }
+        }
+        return null;
+    }
+
+    private static int diff(String a, String b) {
+        int count = a.length();
+        for (int i = 0; i < a.length(); i++) {
+            if (a.charAt(i) == b.charAt(i)) {
+                count--;
+            }
+        }
+        return count;
+    }
+
+    private static boolean inSequence(String longer, String shorter) {
+        int l = 0;
+        int s = 0;
+        while (l < longer.length() && s < shorter.length()) {
+            if (longer.charAt(l) == shorter.charAt(s)) {
+                s++;
+            }
+            l++;
+        }
+        return shorter.length() == s; // if 0, all letters in longer found in shorter
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/util/StopWatch.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.util;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.StringJoiner;
+
+public final class StopWatch {
+    private record Timing(String name, Instant start) {
+    }
+
+    private final List<Timing> timings = new ArrayList<>();
+
+    public void beginQueryValidation() {
+        beginTask("query-validation");
+    }
+
+    public void beginAggregation() {
+        beginTask("aggregation");
+    }
+
+    public void beginFormatting() {
+        beginTask("formatting");
+    }
+
+    public void beginTask(String name) {
+        timings.add(new Timing(name, Instant.now()));
+    }
+
+    public void finish() {
+        beginTask("end");
+    }
+
+    @Override
+    public String toString() {
+        StringJoiner sb = new StringJoiner(", ");
+        for (int i = 0; i < timings.size() - 1; i++) {
+            Timing current = timings.get(i);
+            Timing next = timings.get(i + 1);
+            Duration d = Duration.between(current.start(), next.start());
+            sb.add(current.name() + "=" + ValueFormatter.formatDuration(d));
+        }
+        return sb.toString();
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/util/Tokenizer.java

@@ -0,0 +1,236 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.util;
+
+import java.text.ParseException;
+
+public final class Tokenizer implements AutoCloseable {
+    private final String text;
+    private final char[] separators;
+    private int index;
+
+    /**
+     * Constructs a Tokenizer.
+     *
+     * @param text       text to tokenize
+     * @param separators separator, for example ',' or ';'
+     */
+    public Tokenizer(String text, char... separators) {
+        this.text = text;
+        this.separators = separators;
+    }
+
+    /**
+     * If the next token matches a string, it is consumed and {@code true} returned,
+     * {@code false} otherwise.
+     */
+    public boolean accept(String match) {
+        skipWhitespace();
+        int t = 0;
+        while (index + t < text.length() && t < match.length()) {
+            char c = Character.toLowerCase(text.charAt(index + t));
+            char d = Character.toLowerCase(match.charAt(t));
+            if (d != c) {
+                return false;
+            }
+            t++;
+            if (isSeparator(c)) {
+                break;
+            }
+        }
+        if (t == match.length()) {
+            index += match.length();
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Similar to accept(String), but requires several tokens to match.
+     */
+    public boolean accept(String... matches) {
+        int position = index;
+        for (String s : matches) {
+            if (!accept(s)) {
+                index = position;
+                return false;
+
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Similar to accept(String...), but sufficient if one token matches.
+     *
+     * @param matches
+     * @return
+     */
+    public boolean acceptAny(String... matches) {
+        for (String match : matches) {
+            if (accept(match)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Return {@code true} if there are more tokens.
+     */
+    public boolean hasNext() {
+        int k = index;
+        while (k < text.length()) {
+            char c = text.charAt(k);
+            if (!Character.isWhitespace(c)) {
+                return true;
+            }
+            k++;
+        }
+        return false;
+    }
+
+    /**
+     * Throws exception if the next token doesn't match.
+     */
+    public void expect(String expected) throws ParseException {
+        if (!accept(expected)) {
+            throw new ParseException("Expected " + expected, index);
+        }
+    }
+
+    /**
+     * Return the next character without consuming it, or throw exception if
+     * {@code EOF} is reached.
+     */
+    public char peekChar() throws ParseException {
+        skipWhitespace();
+        if (index < text.length()) {
+            return text.charAt(index);
+        }
+        throw new ParseException("Unexpected EOF reached", index);
+    }
+
+    /**
+     * Return the next token, or throw exception if {@code EOF} is reached.
+     */
+    public String next() throws ParseException {
+        skipWhitespace();
+        StringBuilder sb = new StringBuilder();
+        while (index < text.length()) {
+            char c = text.charAt(index);
+            if (isQuoteCharacter(c)) {
+                int p = findNext(c);
+                String t = text.substring(index + 1, p);
+                sb.append(t);
+                index = p;
+            } else {
+                if (isSeparator(c)) {
+                    if (sb.isEmpty()) {
+                        index++;
+                        return String.valueOf(c); // Inte helt optimalt
+                    } else {
+                        return sb.toString();
+                    }
+                }
+                if (Character.isWhitespace(c)) {
+                    return sb.toString();
+                }
+                sb.append(c);
+            }
+            index++;
+        }
+        if (sb.isEmpty()) {
+            throw new ParseException("Unexpected EOF reached", index);
+        }
+        return sb.toString();
+    }
+
+    /**
+     * Skips all character until {@code '\n'}
+     */
+    public void skipLine() {
+        while (index < text.length()) {
+            char c = text.charAt(index++);
+            if (c == '\n') {
+                return;
+            }
+        }
+    }
+
+    /**
+     * Returns the current position in the text.
+     */
+    public int getPosition() {
+        return index;
+    }
+
+    private void skipWhitespace() {
+        while (index < text.length()) {
+            char c = text.charAt(index);
+            if (!Character.isWhitespace(c)) {
+                return;
+            }
+            index++;
+        }
+    }
+
+    private boolean isSeparator(char c) {
+        for (char separator : separators) {
+            if (c == separator) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private int findNext(char c) throws ParseException {
+        for (int p = index + 1; p < text.length(); p++) {
+            if (c == text.charAt(p)) {
+                return p;
+            }
+        }
+        throw new ParseException("Could not find match " + c, index);
+    }
+
+    private boolean isQuoteCharacter(char c) {
+        return c == '\'' || c == '"';
+    }
+
+    /**
+     * Closes the Tokenizer.
+     * <p>
+     * Requires that all the tokens have been consumed.
+     *
+     * @throws ParseException if there are tokens left
+     */
+    @Override
+    public void close() throws ParseException {
+        skipWhitespace();
+        if (index != text.length()) {
+            throw new ParseException("Unexpected token '" + next() + "' found", getPosition());
+        }
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/util/UserDataException.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.internal.util;
+
+/**
+ * Exception that is thrown if there is something wrong with the input, for instance
+ * a file that can't be read or a numerical value that is out of range.
+ * <p>
+ * When this exception is thrown, a user will typically not want to see the
+ * command line syntax, but instead information about what was wrong with the
+ * input.
+ */
+public final class UserDataException extends Exception {
+    private static final long serialVersionUID = 6656457380115167810L;
+    /**
+     * The error message.
+     *
+     * The first letter should not be capitalized, so a context can be printed prior
+     * to the error message.
+     *
+     * @param errorMessage
+     */
+    public UserDataException(String errorMessage) {
+        super(errorMessage);
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/util/UserSyntaxException.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.internal.util;
+
+/**
+ * Exception that is thrown if options don't follow the syntax of the command.
+ */
+public final class UserSyntaxException extends Exception {
+    private static final long serialVersionUID = 3437009454344160933L;
+
+    /**
+     * The error message.
+     *
+     * The first letter should not be capitalized, so a context can be printed prior
+     * to the error message.
+     *
+     * @param errorMessage message
+     */
+    public UserSyntaxException(String errorMessage) {
+        super(errorMessage);
+    }
+}

src/jdk.jfr/share/classes/jdk/jfr/internal/util/ValueFormatter.java

@@ -0,0 +1,275 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.internal.util;
+
+import java.text.NumberFormat;
+import java.time.Duration;
+import java.time.Instant;
+import java.time.LocalTime;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.StringJoiner;
+
+import jdk.jfr.consumer.RecordedClass;
+import jdk.jfr.consumer.RecordedMethod;
+
+public final class ValueFormatter {
+    private static final NumberFormat NUMBER_FORMAT = NumberFormat.getNumberInstance();
+    private static final DateTimeFormatter DATE_FORMAT = DateTimeFormatter.ofPattern("HH:mm:ss");
+    private static final Duration MICRO_SECOND = Duration.ofNanos(1_000);
+    private static final Duration SECOND = Duration.ofSeconds(1);
+    private static final Duration MINUTE = Duration.ofMinutes(1);
+    private static final Duration HOUR = Duration.ofHours(1);
+    private static final Duration DAY = Duration.ofDays(1);
+    private static final int NANO_SIGNIFICANT_FIGURES = 9;
+    private static final int MILL_SIGNIFICANT_FIGURES = 3;
+    private static final int DISPLAY_NANO_DIGIT = 3;
+    private static final int BASE = 10;
+
+    public static String formatNumber(Number n) {
+        return NUMBER_FORMAT.format(n);
+    }
+
+    public static String formatDuration(Duration d) {
+        Duration roundedDuration = roundDuration(d);
+        if (roundedDuration.equals(Duration.ZERO)) {
+            return "0 s";
+        } else if (roundedDuration.isNegative()) {
+            return "-" + formatPositiveDuration(roundedDuration.abs());
+        } else {
+            return formatPositiveDuration(roundedDuration);
+        }
+    }
+
+    private static String formatPositiveDuration(Duration d){
+        if (d.compareTo(MICRO_SECOND) < 0) {
+            // 0.000001 ms - 0.000999 ms
+            double outputMs = (double) d.toNanosPart() / 1_000_000;
+            return String.format("%.6f ms", outputMs);
+        } else if (d.compareTo(SECOND) < 0) {
+            // 0.001 ms - 999 ms
+            int valueLength = countLength(d.toNanosPart());
+            int outputDigit = NANO_SIGNIFICANT_FIGURES - valueLength;
+            double outputMs = (double) d.toNanosPart() / 1_000_000;
+            return String.format("%." + outputDigit + "f ms", outputMs);
+        } else if (d.compareTo(MINUTE) < 0) {
+            // 1.00 s - 59.9 s
+            int valueLength = countLength(d.toSecondsPart());
+            int outputDigit = MILL_SIGNIFICANT_FIGURES - valueLength;
+            double outputSecond = d.toSecondsPart() + (double) d.toMillisPart() / 1_000;
+            return String.format("%." + outputDigit + "f s", outputSecond);
+        } else if (d.compareTo(HOUR) < 0) {
+            // 1 m 0 s - 59 m 59 s
+            return String.format("%d m %d s", d.toMinutesPart(), d.toSecondsPart());
+        } else if (d.compareTo(DAY) < 0) {
+            // 1 h 0 m - 23 h 59 m
+            return String.format("%d h %d m", d.toHoursPart(), d.toMinutesPart());
+        } else {
+            // 1 d 0 h -
+            return String.format("%d d %d h", d.toDaysPart(), d.toHoursPart());
+        }
+    }
+
+    private static int countLength(long value){
+        return (int) Math.log10(value) + 1;
+    }
+
+    private static Duration roundDuration(Duration d) {
+        if (d.equals(Duration.ZERO)) {
+            return d;
+        } else if(d.isNegative()) {
+            Duration roundedPositiveDuration = roundPositiveDuration(d.abs());
+            return roundedPositiveDuration.negated();
+        } else {
+            return roundPositiveDuration(d);
+        }
+    }
+
+    private static Duration roundPositiveDuration(Duration d){
+        if (d.compareTo(MICRO_SECOND) < 0) {
+            // No round
+            return d;
+        } else if (d.compareTo(SECOND) < 0) {
+            // Round significant figures to three digits
+            int valueLength = countLength(d.toNanosPart());
+            int roundValue = (int) Math.pow(BASE, valueLength - DISPLAY_NANO_DIGIT);
+            long roundedNanos = Math.round((double) d.toNanosPart() / roundValue) * roundValue;
+            return d.truncatedTo(ChronoUnit.SECONDS).plusNanos(roundedNanos);
+        } else if (d.compareTo(MINUTE) < 0) {
+            // Round significant figures to three digits
+            int valueLength = countLength(d.toSecondsPart());
+            int roundValue = (int) Math.pow(BASE, valueLength);
+            long roundedMills = Math.round((double) d.toMillisPart() / roundValue) * roundValue;
+            return d.truncatedTo(ChronoUnit.SECONDS).plusMillis(roundedMills);
+        } else if (d.compareTo(HOUR) < 0) {
+            // Round for more than 500 ms or less
+            return d.plusMillis(SECOND.dividedBy(2).toMillisPart()).truncatedTo(ChronoUnit.SECONDS);
+        } else if (d.compareTo(DAY) < 0) {
+            // Round for more than 30 seconds or less
+            return d.plusSeconds(MINUTE.dividedBy(2).toSecondsPart()).truncatedTo(ChronoUnit.MINUTES);
+        } else {
+            // Round for more than 30 minutes or less
+            return d.plusMinutes(HOUR.dividedBy(2).toMinutesPart()).truncatedTo(ChronoUnit.HOURS);
+        }
+    }
+
+    public static String formatClass(RecordedClass clazz) {
+        String name = clazz.getName();
+        if (name.startsWith("[")) {
+            return decodeDescriptors(name, "").getFirst();
+        }
+        return name;
+    }
+
+    // Tjis method can't handle Long.MIN_VALUE because absolute value is negative
+    private static String formatDataAmount(String formatter, long amount) {
+        int exp = (int) (Math.log(Math.abs(amount)) / Math.log(1024));
+        char unitPrefix = "kMGTPE".charAt(exp - 1);
+        return String.format(formatter, amount / Math.pow(1024, exp), unitPrefix);
+    }
+
+    public static String formatBytesCompact(long bytes) {
+        if (bytes < 1024) {
+            return String.valueOf(bytes);
+        }
+        return formatDataAmount("%.1f%cB", bytes);
+    }
+
+    public static String formatBits(long bits) {
+        if (bits == 1 || bits == -1) {
+            return bits + " bit";
+        }
+        if (bits < 1024 && bits > -1024) {
+            return bits + " bits";
+        }
+        return formatDataAmount("%.1f %cbit", bits);
+    }
+
+    public static String formatBytes(long bytes) {
+        if (bytes == 1 || bytes == -1) {
+            return bytes + " byte";
+        }
+        if (bytes < 1024 && bytes > -1024) {
+            return bytes + " bytes";
+        }
+        return formatDataAmount("%.1f %cB", bytes);
+    }
+
+    public static String formatBytesPerSecond(long bytes) {
+        if (bytes < 1024 && bytes > -1024) {
+            return bytes + " byte/s";
+        }
+        return formatDataAmount("%.1f %cB/s", bytes);
+    }
+
+    public static String formatBitsPerSecond(long bits) {
+        if (bits < 1024 && bits > -1024) {
+            return bits + " bps";
+        }
+        return formatDataAmount("%.1f %cbps", bits);
+    }
+
+    public static String formatMethod(RecordedMethod m, boolean compact) {
+        StringBuilder sb = new StringBuilder();
+        sb.append(m.getType().getName());
+        sb.append(".");
+        sb.append(m.getName());
+        sb.append("(");
+        StringJoiner sj = new StringJoiner(", ");
+        String md = m.getDescriptor().replace("/", ".");
+        String parameter = md.substring(1, md.lastIndexOf(")"));
+        List<String> parameters = decodeDescriptors(parameter, "");
+        if (!compact) {
+            for (String qualifiedName :parameters) {
+                String typeName = qualifiedName.substring(qualifiedName.lastIndexOf('.') + 1);
+                sj.add(typeName);
+            }
+            sb.append(sj.toString());
+        } else {
+            if (!parameters.isEmpty()) {
+               sb.append("...");
+            }
+        }
+        sb.append(")");
+
+        return sb.toString();
+    }
+
+    private static List<String> decodeDescriptors(String descriptor, String arraySize) {
+        List<String> descriptors = new ArrayList<>();
+        for (int index = 0; index < descriptor.length(); index++) {
+            String arrayBrackets = "";
+            while (descriptor.charAt(index) == '[') {
+                arrayBrackets = arrayBrackets + "[" + arraySize + "]";
+                arraySize = "";
+                index++;
+            }
+            char c = descriptor.charAt(index);
+            String type;
+            switch (c) {
+            case 'L':
+                int endIndex = descriptor.indexOf(';', index);
+                type = descriptor.substring(index + 1, endIndex);
+                index = endIndex;
+                break;
+            case 'I':
+                type = "int";
+                break;
+            case 'J':
+                type = "long";
+                break;
+            case 'Z':
+                type = "boolean";
+                break;
+            case 'D':
+                type = "double";
+                break;
+            case 'F':
+                type = "float";
+                break;
+            case 'S':
+                type = "short";
+                break;
+            case 'C':
+                type = "char";
+                break;
+            case 'B':
+                type = "byte";
+                break;
+            default:
+                type = "<unknown-descriptor-type>";
+            }
+            descriptors.add(type + arrayBrackets);
+        }
+        return descriptors;
+    }
+
+    public static String formatTimestamp(Instant instant) {
+        return LocalTime.ofInstant(instant, ZoneId.systemDefault()).format(DATE_FORMAT);
+    }
+}

test/jdk/jdk/jfr/jcmd/TestJcmdView.java

@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.jcmd;
+
+import java.util.concurrent.CountDownLatch;
+
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordingStream;
+import jdk.test.lib.process.OutputAnalyzer;
+/**
+ * @test
+ * @summary The test verifies JFR.view command
+ * @key jfr
+ * @requires vm.hasJFR
+ * @requires (vm.gc == "G1" | vm.gc == null)
+ *           & vm.opt.ExplicitGCInvokesConcurrent != false
+ * @library /test/lib /test/jdk
+ * @run main/othervm -XX:-ExplicitGCInvokesConcurrent -XX:-DisableExplicitGC
+ *                   -XX:+UseG1GC jdk.jfr.jcmd.TestJcmdView
+ */
+public class TestJcmdView {
+
+    public static void main(String... args) throws Throwable {
+        CountDownLatch jvmInformation = new CountDownLatch(1);
+        CountDownLatch systemGC = new CountDownLatch(1);
+        CountDownLatch gcHeapSummary = new CountDownLatch(1);
+        CountDownLatch oldCollection = new CountDownLatch(1);
+        CountDownLatch garbageCollection = new CountDownLatch(1);
+
+        try (RecordingStream rs = new RecordingStream()) {
+            // Make sure chunks are not released after consumption
+            rs.setMaxSize(Long.MAX_VALUE);
+            rs.enable("jdk.JVMInformation").with("period", "beginChunk");
+            rs.enable("jdk.SystemGC");
+            rs.enable("jdk.GCHeapSummary");
+            rs.enable("jdk.GarbageCollection");
+            rs.enable("jdk.OldGarbageCollection");
+            rs.enable("jdk.YoungGarbageCollection");
+            rs.onEvent("jdk.JVMInformation", e -> {
+                jvmInformation.countDown();
+                System.out.println(e);
+            });
+            rs.onEvent("jdk.SystemGC", e -> {
+                systemGC.countDown();
+                System.out.println(e);
+            });
+            rs.onEvent("jdk.GCHeapSummary", e -> {
+                gcHeapSummary.countDown();
+                System.out.println(e);
+            });
+            rs.onEvent("jdk.OldGarbageCollection", e -> {
+                oldCollection.countDown();
+                System.out.println(e);
+            });
+            rs.onEvent("jdk.GarbageCollection", e-> {
+                garbageCollection.countDown();
+                System.out.println(e);
+            });
+            rs.startAsync();
+            // Emit some GC events
+            System.gc();
+            System.gc();
+            System.gc();
+            // Wait for them being in the repository
+            jvmInformation.await();
+            systemGC.await();
+            gcHeapSummary.await();
+            oldCollection.countDown();
+            // Test events that are in the current chunk
+            testEventType();
+            testFormView();
+            testTableView();
+            rs.disable("jdk.JVMInformation");
+            // Force chunk rotation
+            rotate();
+            // Test events that are NOT in current chunk
+            testEventType();
+            testFormView();
+            testTableView();
+        }
+    }
+
+    private static void rotate() {
+       try (Recording r = new Recording()) {
+           r.start();
+       }
+    }
+
+    private static void testFormView() throws Throwable {
+        OutputAnalyzer output = JcmdHelper.jcmd("JFR.view", "jvm-information");
+        // Verify title
+        output.shouldContain("JVM Information");
+        // Verify field label
+        output.shouldContain("VM Arguments:");
+        // Verify field value
+        long pid = ProcessHandle.current().pid();
+        String lastThreeDigits = String.valueOf(pid % 1000);
+        output.shouldContain(lastThreeDigits);
+    }
+
+    private static void testTableView() throws Throwable {
+        OutputAnalyzer output = JcmdHelper.jcmd("JFR.view", "verbose=true", "gc");
+        // Verify heading
+        output.shouldContain("Longest Pause");
+        // Verify verbose heading
+        output.shouldContain("(longestPause)");
+        // Verify row contents
+        output.shouldContain("Old Garbage Collection");
+        // Verify verbose query
+        output.shouldContain("SELECT");
+    }
+
+    private static void testEventType() throws Throwable {
+        OutputAnalyzer output = JcmdHelper.jcmd(
+             "JFR.view", "verbose=true", "width=300", "cell-height=100", "SystemGC");
+        // Verify title
+        output.shouldContain("System GC");
+        // Verify headings
+        output.shouldContain("Invoked Concurrent");
+        // Verify verbose headings
+        output.shouldContain("invokedConcurrent");
+        // Verify thread value
+        output.shouldContain(Thread.currentThread().getName());
+        // Verify stack frame
+        output.shouldContain("TestJcmdView.main");
+    }
+}

test/jdk/jdk/jfr/tool/TestView.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.jfr.tool;
+
+import java.io.FileWriter;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import jdk.test.lib.Utils;
+import jdk.test.lib.process.OutputAnalyzer;
+/**
+ * @test
+ * @summary Test jfr view
+ * @key jfr
+ * @requires vm.hasJFR
+ * @requires (vm.gc == "G1" | vm.gc == null)
+ *           & vm.opt.ExplicitGCInvokesConcurrent != false
+ * @library /test/lib /test/jdk
+ * @run main/othervm -XX:-ExplicitGCInvokesConcurrent -XX:-DisableExplicitGC
+ *                   -XX:+UseG1GC jdk.jfr.jcmd.TestJcmdView
+ */
+public class TestView {
+
+    public static void main(String... args) throws Throwable {
+        testIncorrectUsage();
+        String recordingFile = ExecuteHelper.createProfilingRecording().toAbsolutePath().toString();
+        testEventType(recordingFile);
+        testFormView(recordingFile);
+        testTableView(recordingFile);
+    }
+
+    private static void testIncorrectUsage() throws Throwable {
+        OutputAnalyzer output = ExecuteHelper.jfr("view");
+        output.shouldContain("missing file");
+
+        output = ExecuteHelper.jfr("view", "missing.jfr");
+        output.shouldContain("could not open file ");
+
+        Path file = Utils.createTempFile("faked-file", ".jfr");
+        FileWriter fw = new FileWriter(file.toFile());
+        fw.write('d');
+        fw.close();
+        output = ExecuteHelper.jfr("view", "--wrongOption", file.toAbsolutePath().toString());
+        output.shouldContain("unknown option");
+        Files.delete(file);
+    }
+
+    private static void testFormView(String recording) throws Throwable {
+        OutputAnalyzer output = ExecuteHelper.jfr("view", "jvm-information", recording);
+        // Verify title
+        output.shouldContain("JVM Information");
+        // Verify field label
+        output.shouldContain("VM Arguments:");
+        // Verify field value
+        long pid = ProcessHandle.current().pid();
+        String lastThreeDigits = String.valueOf(pid % 1000);
+        output.shouldContain(lastThreeDigits);
+    }
+
+    private static void testTableView(String recording) throws Throwable {
+        OutputAnalyzer output = ExecuteHelper.jfr("view", "--verbose", "gc", recording);
+        // Verify heading
+        output.shouldContain("Longest Pause");
+        // Verify verbose heading
+        output.shouldContain("(longestPause)");
+        // Verify row contents
+        output.shouldContain("Old Garbage Collection");
+        // Verify verbose query
+        output.shouldContain("SELECT");
+    }
+
+    private static void testEventType(String recording) throws Throwable {
+        OutputAnalyzer output = ExecuteHelper.jfr(
+             "view", "--verbose", "--width", "300", "--cell-height", "100", "SystemGC", recording);
+        // Verify title
+        output.shouldContain("System GC");
+        // Verify headings
+        output.shouldContain("Invoked Concurrent");
+        // Verify verbose headings
+        output.shouldContain("invokedConcurrent");
+        // Verify thread value
+        output.shouldContain(Thread.currentThread().getName());
+        // Verify stack frame
+        output.shouldContain("ExecuteHelper.createProfilingRecording");
+    }
+}