[flink] Add ManifestCompactProcedure to enable compact manifest manually

paimon-core/src/main/java/org/apache/paimon/operation/FileStoreCommit.java

@@ -74,6 +74,8 @@ void overwrite(
 
     void truncateTable(long commitIdentifier);
 
+    void compactManifest();
+
     /** Abort an unsuccessful commit. The data files will be deleted. */
     void abort(List<CommitMessage> commitMessages);
 

paimon-core/src/main/java/org/apache/paimon/operation/FileStoreCommitImpl.java

@@ -1025,47 +1025,7 @@ CommitResult tryCommitOnce(
                     e);
         }
 
-        boolean success;
-        try {
-            Callable<Boolean> callable =
-                    () -> {
-                        boolean committed =
-                                fileIO.tryToWriteAtomic(newSnapshotPath, newSnapshot.toJson());
-                        if (committed) {
-                            snapshotManager.commitLatestHint(newSnapshotId);
-                        }
-                        return committed;
-                    };
-            if (lock != null) {
-                success =
-                        lock.runWithLock(
-                                () ->
-                                        // fs.rename may not returns false if target file
-                                        // already exists, or even not atomic
-                                        // as we're relying on external locking, we can first
-                                        // check if file exist then rename to work around this
-                                        // case
-                                        !fileIO.exists(newSnapshotPath) && callable.call());
-            } else {
-                success = callable.call();
-            }
-        } catch (Throwable e) {
-            // exception when performing the atomic rename,
-            // we cannot clean up because we can't determine the success
-            throw new RuntimeException(
-                    String.format(
-                            "Exception occurs when committing snapshot #%d (path %s) by user %s "
-                                    + "with identifier %s and kind %s. "
-                                    + "Cannot clean up because we can't determine the success.",
-                            newSnapshotId,
-                            newSnapshotPath,
-                            commitUser,
-                            identifier,
-                            commitKind.name()),
-                    e);
-        }
-
-        if (success) {
+        if (commitSnapshotImpl(newSnapshot, newSnapshotPath)) {
             if (LOG.isDebugEnabled()) {
                 LOG.debug(
                         String.format(
@@ -1104,6 +1064,97 @@ CommitResult tryCommitOnce(
                 baseDataFiles);
     }
 
+    public void compactManifest() {
+        Snapshot latestSnapshot = snapshotManager.latestSnapshot();
+
+        if (latestSnapshot == null) {
+            return;
+        }
+
+        List<ManifestFileMeta> mergeBeforeManifests =
+                manifestList.readDataManifests(latestSnapshot);
+
+        List<ManifestFileMeta> mergeAfterManifests =
+                ManifestFileMerger.merge(
+                        mergeBeforeManifests,
+                        manifestFile,
+                        manifestTargetSize.getBytes(),
+                        1,
+                        manifestFullCompactionSize.getBytes(),
+                        partitionType,
+                        manifestReadParallelism);
+
+        String baseManifestList = manifestList.write(mergeAfterManifests);
+        String deltaManifestList = manifestList.write(Collections.emptyList());
+
+        // prepare snapshot file
+        Snapshot newSnapshot =
+                new Snapshot(
+                        latestSnapshot.id() + 1,
+                        latestSnapshot.schemaId(),
+                        baseManifestList,
+                        deltaManifestList,
+                        null,
+                        latestSnapshot.indexManifest(),
+                        commitUser,
+                        Long.MAX_VALUE,
+                        Snapshot.CommitKind.COMPACT,
+                        System.currentTimeMillis(),
+                        latestSnapshot.logOffsets(),
+                        latestSnapshot.totalRecordCount(),
+                        0L,
+                        0L,
+                        latestSnapshot.watermark(),
+                        latestSnapshot.statistics());
+
+        Path newSnapshotPath =
+                branchName.equals(DEFAULT_MAIN_BRANCH)
+                        ? snapshotManager.snapshotPath(newSnapshot.id())
+                        : snapshotManager.copyWithBranch(branchName).snapshotPath(newSnapshot.id());
+
+        commitSnapshotImpl(newSnapshot, newSnapshotPath);
+    }
+
+    private boolean commitSnapshotImpl(Snapshot newSnapshot, Path newSnapshotPath) {
+        try {
+            Callable<Boolean> callable =
+                    () -> {
+                        boolean committed =
+                                fileIO.tryToWriteAtomic(newSnapshotPath, newSnapshot.toJson());
+                        if (committed) {
+                            snapshotManager.commitLatestHint(newSnapshot.id());
+                        }
+                        return committed;
+                    };
+            if (lock != null) {
+                return lock.runWithLock(
+                        () ->
+                                // fs.rename may not returns false if target file
+                                // already exists, or even not atomic
+                                // as we're relying on external locking, we can first
+                                // check if file exist then rename to work around this
+                                // case
+                                !fileIO.exists(newSnapshotPath) && callable.call());
+            } else {
+                return callable.call();
+            }
+        } catch (Throwable e) {
+            // exception when performing the atomic rename,
+            // we cannot clean up because we can't determine the success
+            throw new RuntimeException(
+                    String.format(
+                            "Exception occurs when committing snapshot #%d (path %s) by user %s "
+                                    + "with identifier %s and kind %s. "
+                                    + "Cannot clean up because we can't determine the success.",
+                            newSnapshot.id(),
+                            newSnapshotPath,
+                            commitUser,
+                            newSnapshot.commitIdentifier(),
+                            newSnapshot.commitKind().name()),
+                    e);
+        }
+    }
+
     private List<SimpleFileEntry> readIncrementalChanges(
             Snapshot from, Snapshot to, List<BinaryRow> changedPartitions) {
         List<SimpleFileEntry> entries = new ArrayList<>();

paimon-core/src/test/java/org/apache/paimon/operation/FileStoreCommitTest.java

@@ -33,6 +33,7 @@
 import org.apache.paimon.index.IndexFileMeta;
 import org.apache.paimon.manifest.IndexManifestEntry;
 import org.apache.paimon.manifest.ManifestCommittable;
+import org.apache.paimon.manifest.ManifestFileMeta;
 import org.apache.paimon.mergetree.compact.DeduplicateMergeFunction;
 import org.apache.paimon.predicate.PredicateBuilder;
 import org.apache.paimon.schema.Schema;
@@ -910,6 +911,38 @@ public void testDVIndexFiles() throws Exception {
         assertThat(dvs.get("f2").isDeleted(3)).isTrue();
     }
 
+    @Test
+    public void testManifestCompact() throws Exception {
+        TestFileStore store = createStore(false);
+
+        List<KeyValue> keyValues = generateDataList(1);
+        BinaryRow partition = gen.getPartition(keyValues.get(0));
+        // commit 1
+        Snapshot snapshot1 =
+                store.commitData(keyValues, s -> partition, kv -> 0, Collections.emptyMap()).get(0);
+        // commit 2
+        Snapshot snapshot2 =
+                store.overwriteData(keyValues, s -> partition, kv -> 0, Collections.emptyMap())
+                        .get(0);
+        // commit 3
+        Snapshot snapshot3 =
+                store.overwriteData(keyValues, s -> partition, kv -> 0, Collections.emptyMap())
+                        .get(0);
+
+        long deleteNum =
+                store.manifestListFactory().create().readDataManifests(snapshot3).stream()
+                        .mapToLong(ManifestFileMeta::numDeletedFiles)
+                        .sum();
+        assertThat(deleteNum).isEqualTo(2);
+        store.newCommit().compactManifest();
+        Snapshot latest = store.snapshotManager().latestSnapshot();
+        assertThat(
+                        store.manifestListFactory().create().readDataManifests(latest).stream()
+                                .mapToLong(ManifestFileMeta::numDeletedFiles)
+                                .sum())
+                .isEqualTo(0);
+    }
+
     private TestFileStore createStore(boolean failing) throws Exception {
         return createStore(failing, 1);
     }

paimon-flink/paimon-flink-common/src/main/java/org/apache/paimon/flink/procedure/ManifestCompactProcedure.java

@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.paimon.flink.procedure;
+
+import org.apache.paimon.CoreOptions;
+import org.apache.paimon.operation.FileStoreCommit;
+import org.apache.paimon.table.FileStoreTable;
+
+import org.apache.flink.table.annotation.ArgumentHint;
+import org.apache.flink.table.annotation.DataTypeHint;
+import org.apache.flink.table.annotation.ProcedureHint;
+import org.apache.flink.table.procedure.ProcedureContext;
+
+import java.util.Collections;
+
+/** Compact manifest file to reduce deleted manifest entries. */
+public class ManifestCompactProcedure extends ProcedureBase {
+
+    private static final String commitUser = "Compact-Procedure-Committer";
+
+    @Override
+    public String identifier() {
+        return "manifest_compact";
+    }
+
+    @ProcedureHint(argument = {@ArgumentHint(name = "table", type = @DataTypeHint("STRING"))})
+    public String[] call(ProcedureContext procedureContext, String tableId) throws Exception {
+
+        FileStoreTable table =
+                (FileStoreTable)
+                        table(tableId)
+                                .copy(
+                                        Collections.singletonMap(
+                                                CoreOptions.COMMIT_USER_PREFIX.key(), commitUser));
+
+        try (FileStoreCommit commit =
+                table.store()
+                        .newCommit(table.coreOptions().createCommitUser())
+                        .ignoreEmptyCommit(false)) {
+            commit.compactManifest();
+        }
+        return new String[] {"success"};
+    }
+}

paimon-flink/paimon-flink-common/src/main/resources/META-INF/services/org.apache.paimon.factories.Factory

@@ -72,3 +72,4 @@ org.apache.paimon.flink.procedure.RenameTagProcedure
 org.apache.paimon.flink.procedure.FastForwardProcedure
 org.apache.paimon.flink.procedure.MarkPartitionDoneProcedure
 org.apache.paimon.flink.procedure.CloneProcedure
+org.apache.paimon.flink.procedure.ManifestCompactProcedure