[Feature](iceberg) Implement rewrite_manifests procedure for Iceberg

fe/fe-core/src/main/java/org/apache/doris/datasource/iceberg/action/IcebergExecuteActionFactory.java

@@ -40,6 +40,7 @@ public class IcebergExecuteActionFactory {
     public static final String EXPIRE_SNAPSHOTS = "expire_snapshots";
     public static final String REWRITE_DATA_FILES = "rewrite_data_files";
     public static final String PUBLISH_CHANGES = "publish_changes";
+    public static final String REWRITE_MANIFESTS = "rewrite_manifests";
 
     /**
      * Create an Iceberg-specific ExecuteAction instance.
@@ -84,6 +85,9 @@ public static ExecuteAction createAction(String actionType, Map<String, String>
             case PUBLISH_CHANGES:
                 return new IcebergPublishChangesAction(properties, partitionNamesInfo,
                         whereCondition);
+            case REWRITE_MANIFESTS:
+                return new IcebergRewriteManifestsAction(properties, partitionNamesInfo,
+                        whereCondition);
             default:
                 throw new DdlException("Unsupported Iceberg procedure: " + actionType
                         + ". Supported procedures: " + String.join(", ", getSupportedActions()));
@@ -104,7 +108,8 @@ public static String[] getSupportedActions() {
                 FAST_FORWARD,
                 EXPIRE_SNAPSHOTS,
                 REWRITE_DATA_FILES,
-                PUBLISH_CHANGES
+                PUBLISH_CHANGES,
+                REWRITE_MANIFESTS
         };
     }
 }

fe/fe-core/src/main/java/org/apache/doris/datasource/iceberg/action/IcebergRewriteManifestsAction.java

@@ -0,0 +1,109 @@
+// 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.doris.datasource.iceberg.action;
+
+import org.apache.doris.catalog.Column;
+import org.apache.doris.catalog.TableIf;
+import org.apache.doris.catalog.Type;
+import org.apache.doris.common.ArgumentParsers;
+import org.apache.doris.common.UserException;
+import org.apache.doris.datasource.ExternalTable;
+import org.apache.doris.datasource.iceberg.IcebergExternalTable;
+import org.apache.doris.datasource.iceberg.rewrite.RewriteManifestExecutor;
+import org.apache.doris.info.PartitionNamesInfo;
+import org.apache.doris.nereids.trees.expressions.Expression;
+
+import com.google.common.collect.Lists;
+import org.apache.iceberg.Snapshot;
+import org.apache.iceberg.Table;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
+/**
+ * Action for rewriting Iceberg manifest files to optimize metadata layout
+ */
+public class IcebergRewriteManifestsAction extends BaseIcebergAction {
+    private static final Logger LOG = LogManager.getLogger(IcebergRewriteManifestsAction.class);
+    public static final String SPEC_ID = "spec_id";
+
+    public IcebergRewriteManifestsAction(Map<String, String> properties,
+            Optional<PartitionNamesInfo> partitionNamesInfo,
+            Optional<Expression> whereCondition) {
+        super("rewrite_manifests", properties, partitionNamesInfo, whereCondition);
+    }
+
+    @Override
+    protected void registerIcebergArguments() {
+        namedArguments.registerOptionalArgument(SPEC_ID,
+                "Spec id of the manifests to rewrite (defaults to current spec id)",
+                null,
+                ArgumentParsers.intRange(SPEC_ID, 0, Integer.MAX_VALUE));
+    }
+
+    @Override
+    protected void validateIcebergAction() throws UserException {
+        validateNoPartitions();
+        validateNoWhereCondition();
+    }
+
+    @Override
+    protected List<String> executeAction(TableIf table) throws UserException {
+        try {
+            Table icebergTable = ((IcebergExternalTable) table).getIcebergTable();
+            Snapshot current = icebergTable.currentSnapshot();
+            if (current == null) {
+                // No current snapshot means the table is empty, no manifests to rewrite
+                return Lists.newArrayList("0", "0");
+            }
+
+            // Get optional spec_id parameter
+            Integer specId = namedArguments.getInt(SPEC_ID);
+
+            // Execute rewrite operation
+            RewriteManifestExecutor executor = new RewriteManifestExecutor();
+            RewriteManifestExecutor.Result result = executor.execute(
+                    icebergTable,
+                    (ExternalTable) table,
+                    specId);
+
+            return result.toStringList();
+        } catch (Exception e) {
+            LOG.warn("Failed to rewrite manifests for table: {}", table.getName(), e);
+            throw new UserException("Rewrite manifests failed: " + e.getMessage(), e);
+        }
+    }
+
+    @Override
+    protected List<Column> getResultSchema() {
+        return Lists.newArrayList(
+                new Column("rewritten_manifests_count", Type.INT, false,
+                        "Number of manifests which were re-written by this command"),
+                new Column("added_manifests_count", Type.INT, false,
+                        "Number of new manifest files which were written by this command")
+        );
+    }
+
+    @Override
+    public String getDescription() {
+        return "Rewrite Iceberg manifest files to optimize metadata layout";
+    }
+}

fe/fe-core/src/main/java/org/apache/doris/datasource/iceberg/rewrite/RewriteManifestExecutor.java

@@ -0,0 +1,125 @@
+// 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.doris.datasource.iceberg.rewrite;
+
+import org.apache.doris.catalog.Env;
+import org.apache.doris.common.UserException;
+import org.apache.doris.datasource.ExternalTable;
+
+import org.apache.iceberg.ManifestFile;
+import org.apache.iceberg.RewriteManifests;
+import org.apache.iceberg.Snapshot;
+import org.apache.iceberg.Table;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+
+/**
+ * Executor for manifest rewrite operations
+ */
+public class RewriteManifestExecutor {
+    private static final Logger LOG = LogManager.getLogger(RewriteManifestExecutor.class);
+
+    public static class Result {
+        private final int rewrittenCount;
+        private final int addedCount;
+
+        public Result(int rewrittenCount, int addedCount) {
+            this.rewrittenCount = rewrittenCount;
+            this.addedCount = addedCount;
+        }
+
+        public java.util.List<String> toStringList() {
+            return java.util.Arrays.asList(String.valueOf(rewrittenCount),
+                    String.valueOf(addedCount));
+        }
+    }
+
+    /**
+     * Execute manifest rewrite using Iceberg RewriteManifests API
+     */
+    public Result execute(Table table, ExternalTable extTable, Integer specId) throws UserException {
+        try {
+            // Get current snapshot and return early if table is empty
+            Snapshot currentSnapshot = table.currentSnapshot();
+            if (currentSnapshot == null) {
+                return new Result(0, 0);
+            }
+
+            // Collect manifests before rewrite and filter by specId if provided
+            List<ManifestFile> manifestsBefore = currentSnapshot.dataManifests(table.io());
+            List<ManifestFile> manifestsBeforeTargeted = filterBySpecId(manifestsBefore, specId);
+
+            int rewrittenCount = manifestsBeforeTargeted.size();
+
+            if (rewrittenCount == 0) {
+                return new Result(0, 0);
+            }
+
+            // Configure rewrite operation, optionally restricting manifests by specId
+            RewriteManifests rm = table.rewriteManifests();
+
+            if (specId != null) {
+                final int targetSpecId = specId;
+                rm.rewriteIf(manifest -> manifest.partitionSpecId() == targetSpecId);
+            }
+
+            // Commit manifest rewrite
+            rm.commit();
+
+            // Refresh snapshot after rewrite
+            Snapshot snapshotAfter = table.currentSnapshot();
+            if (snapshotAfter == null) {
+                return new Result(rewrittenCount, 0);
+            }
+
+            // Collect manifests after rewrite and filter by specId
+            List<ManifestFile> manifestsAfter = snapshotAfter.dataManifests(table.io());
+            List<ManifestFile> manifestsAfterTargeted = filterBySpecId(manifestsAfter, specId);
+
+            // Compute addedCount as newly produced manifests (path not in before set)
+            java.util.Set<String> beforePaths = manifestsBeforeTargeted.stream()
+                    .map(ManifestFile::path)
+                    .collect(java.util.stream.Collectors.toSet());
+
+            int addedCount = (int) manifestsAfterTargeted.stream()
+                    .map(ManifestFile::path)
+                    .filter(path -> !beforePaths.contains(path))
+                    .count();
+
+            // Invalidate table cache to ensure metadata is refreshed
+            Env.getCurrentEnv().getExtMetaCacheMgr().invalidateTableCache(extTable);
+
+            return new Result(rewrittenCount, addedCount);
+        } catch (Exception e) {
+            LOG.warn("Failed to execute manifest rewrite for table: {}", extTable.getName(), e);
+            throw new UserException("Failed to rewrite manifests: " + e.getMessage(), e);
+        }
+    }
+
+    private List<ManifestFile> filterBySpecId(List<ManifestFile> manifests, Integer specId) {
+        if (specId == null) {
+            return manifests;
+        }
+        final int targetSpecId = specId;
+        return manifests.stream()
+                .filter(manifest -> manifest.partitionSpecId() == targetSpecId)
+                .collect(java.util.stream.Collectors.toList());
+    }
+}

regression-test/data/external_table_p0/iceberg/action/test_iceberg_rewrite_manifests.out

@@ -0,0 +1,44 @@
+-- This file is automatically generated. You should know what you did if you want to edit this
+-- !before_basic_rewrite --
+1	item1	electronics	100	2024-01-01
+2	item2	electronics	200	2024-01-02
+3	item3	books	300	2024-01-03
+4	item4	books	400	2024-01-04
+5	item5	clothing	500	2024-01-05
+6	item6	clothing	600	2024-01-06
+7	item7	electronics	700	2024-01-07
+8	item8	electronics	800	2024-01-08
+
+-- !after_basic_rewrite --
+1	item1	electronics	100	2024-01-01
+2	item2	electronics	200	2024-01-02
+3	item3	books	300	2024-01-03
+4	item4	books	400	2024-01-04
+5	item5	clothing	500	2024-01-05
+6	item6	clothing	600	2024-01-06
+7	item7	electronics	700	2024-01-07
+8	item8	electronics	800	2024-01-08
+
+-- !before_partitioned_rewrite --
+1	item1	100	2024	1
+2	item2	200	2024	1
+3	item3	300	2024	2
+4	item4	400	2024	2
+5	item5	500	2024	3
+6	item6	600	2024	3
+
+-- !after_partitioned_rewrite --
+1	item1	100	2024	1
+2	item2	200	2024	1
+3	item3	300	2024	2
+4	item4	400	2024	2
+5	item5	500	2024	3
+6	item6	600	2024	3
+
+-- !after_spec_id_rewrite --
+1	item1	100	2024	1	15
+2	item2	200	2024	1	16
+3	item3	300	2024	2	17
+4	item4	400	2024	3	18
+5	item5	500	2024	3	19
+