[spark] support CopyFilesProcedure in spark

docs/content/spark/procedures.md

@@ -463,5 +463,18 @@ This section introduce all available spark procedures about paimon.
          CALL sys.rewrite_file_index(table => "t", where => "day = '2025-08-17'")<br/>
       </td>
    </tr>
+   <tr>
+      <td>copy</td>
+      <td>
+         copy table files. Arguments:
+            <li>source_table: the source table identifier. Cannot be empty.</li>
+            <li>target_table: the target table identifier. Cannot be empty.</li>
+            <li>where: partition predicate. Left empty for all partitions.</li>
+      </td>
+      <td>
+         CALL sys.copy(source_table => "t1", target_table => "t1_copy")<br/>
+         CALL sys.copy(source_table => "t1", target_table => "t1_copy", where => "day = '2025-08-17'")<br/>
+      </td>
+   </tr>
    </tbody>
 </table>

paimon-core/src/main/java/org/apache/paimon/migrate/FileMetaUtils.java

@@ -28,6 +28,7 @@
 import org.apache.paimon.fs.FileIO;
 import org.apache.paimon.fs.FileStatus;
 import org.apache.paimon.fs.Path;
+import org.apache.paimon.index.IndexFileMeta;
 import org.apache.paimon.io.CompactIncrement;
 import org.apache.paimon.io.DataFileMeta;
 import org.apache.paimon.io.DataIncrement;
@@ -95,6 +96,26 @@ public static CommitMessage createCommitMessage(
                         Collections.emptyList(), Collections.emptyList(), Collections.emptyList()));
     }
 
+    public static CommitMessage createCommitMessage(
+            BinaryRow partition,
+            int bucket,
+            int totalBuckets,
+            List<DataFileMeta> dataFileMetas,
+            List<IndexFileMeta> indexFileMetas) {
+        return new CommitMessageImpl(
+                partition,
+                bucket,
+                totalBuckets,
+                new DataIncrement(
+                        dataFileMetas,
+                        Collections.emptyList(),
+                        Collections.emptyList(),
+                        indexFileMetas,
+                        Collections.emptyList()),
+                new CompactIncrement(
+                        Collections.emptyList(), Collections.emptyList(), Collections.emptyList()));
+    }
+
     public static DataFileMeta constructFileMeta(
             String format,
             FileStatus fileStatus,

paimon-spark/paimon-spark-common/src/main/java/org/apache/paimon/spark/SparkProcedures.java

@@ -23,6 +23,7 @@
 import org.apache.paimon.spark.procedure.ClearConsumersProcedure;
 import org.apache.paimon.spark.procedure.CompactManifestProcedure;
 import org.apache.paimon.spark.procedure.CompactProcedure;
+import org.apache.paimon.spark.procedure.CopyFilesProcedure;
 import org.apache.paimon.spark.procedure.CreateBranchProcedure;
 import org.apache.paimon.spark.procedure.CreateFunctionProcedure;
 import org.apache.paimon.spark.procedure.CreateTagFromTimestampProcedure;
@@ -111,6 +112,7 @@ private static Map<String, Supplier<ProcedureBuilder>> initProcedureBuilders() {
         procedureBuilders.put(
                 "trigger_tag_automatic_creation", TriggerTagAutomaticCreationProcedure::builder);
         procedureBuilders.put("rewrite_file_index", RewriteFileIndexProcedure::builder);
+        procedureBuilders.put("copy", CopyFilesProcedure::builder);
         return procedureBuilders.build();
     }
 }

paimon-spark/paimon-spark-common/src/main/java/org/apache/paimon/spark/copy/CopyDataFilesOperator.java

@@ -0,0 +1,87 @@
+/*
+ * 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.spark.copy;
+
+import org.apache.paimon.catalog.Catalog;
+import org.apache.paimon.catalog.Identifier;
+import org.apache.paimon.fs.Path;
+import org.apache.paimon.spark.utils.SparkProcedureUtils;
+import org.apache.paimon.table.FileStoreTable;
+
+import org.apache.commons.collections4.CollectionUtils;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.api.java.function.FlatMapFunction;
+import org.apache.spark.sql.SparkSession;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/** Copy data files from source table to target table. */
+public class CopyDataFilesOperator extends CopyFilesOperator {
+
+    public CopyDataFilesOperator(SparkSession spark, Catalog sourceCatalog, Catalog targetCatalog) {
+        super(spark, sourceCatalog, targetCatalog);
+    }
+
+    public JavaRDD<CopyFileInfo> execute(
+            Identifier sourceIdentifier, Identifier targetIdentifier, List<CopyFileInfo> dataFiles)
+            throws Exception {
+        if (CollectionUtils.isEmpty(dataFiles)) {
+            return null;
+        }
+        FileStoreTable sourceTable = (FileStoreTable) sourceCatalog.getTable(sourceIdentifier);
+        FileStoreTable targetTable = (FileStoreTable) targetCatalog.getTable(targetIdentifier);
+        int readParallelism = SparkProcedureUtils.readParallelism(dataFiles, spark);
+        JavaSparkContext context = JavaSparkContext.fromSparkContext(spark.sparkContext());
+        JavaRDD<CopyFileInfo> copyFileInfoRdd =
+                context.parallelize(dataFiles, readParallelism)
+                        .mapPartitions(new DataFileProcesser(sourceTable, targetTable));
+        return copyFileInfoRdd;
+    }
+
+    /** Copy data files. */
+    public static class DataFileProcesser
+            implements FlatMapFunction<Iterator<CopyFileInfo>, CopyFileInfo> {
+
+        private final FileStoreTable sourceTable;
+        private final FileStoreTable targetTable;
+
+        public DataFileProcesser(FileStoreTable sourceTable, FileStoreTable targetTable) {
+            this.sourceTable = sourceTable;
+            this.targetTable = targetTable;
+        }
+
+        @Override
+        public Iterator<CopyFileInfo> call(Iterator<CopyFileInfo> dataFileIterator)
+                throws Exception {
+            List<CopyFileInfo> result = new ArrayList<>();
+            while (dataFileIterator.hasNext()) {
+                CopyFileInfo file = dataFileIterator.next();
+                Path sourcePath = new Path(file.sourceFilePath());
+                Path targetPath = new Path(file.targetFilePath());
+                CopyFilesUtil.copyFiles(
+                        sourceTable.fileIO(), targetTable.fileIO(), sourcePath, targetPath, false);
+                result.add(file);
+            }
+            return result.iterator();
+        }
+    }
+}

paimon-spark/paimon-spark-common/src/main/java/org/apache/paimon/spark/copy/CopyFileInfo.java

@@ -0,0 +1,92 @@
+/*
+ * 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.spark.copy;
+
+import java.io.Serializable;
+
+/** The information of copy data file. */
+public class CopyFileInfo implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    private final String sourceFilePath;
+
+    private final String targetFilePath;
+
+    private final byte[] partition;
+
+    private final int bucket;
+
+    private final int totalBuckets;
+
+    private final byte[] dataFileMeta;
+
+    public CopyFileInfo(
+            String sourceFilePath,
+            String targetFilePath,
+            byte[] partition,
+            int bucket,
+            byte[] dataFileMeta) {
+        this.sourceFilePath = sourceFilePath;
+        this.targetFilePath = targetFilePath;
+        this.partition = partition;
+        this.bucket = bucket;
+        this.totalBuckets = 0;
+        this.dataFileMeta = dataFileMeta;
+    }
+
+    public CopyFileInfo(
+            String sourceFilePath,
+            String targetFilePath,
+            byte[] partition,
+            int bucket,
+            int totalBuckets,
+            byte[] dataFileMeta) {
+        this.sourceFilePath = sourceFilePath;
+        this.targetFilePath = targetFilePath;
+        this.partition = partition;
+        this.bucket = bucket;
+        this.totalBuckets = totalBuckets;
+        this.dataFileMeta = dataFileMeta;
+    }
+
+    public String sourceFilePath() {
+        return sourceFilePath;
+    }
+
+    public String targetFilePath() {
+        return targetFilePath;
+    }
+
+    public byte[] partition() {
+        return partition;
+    }
+
+    public int bucket() {
+        return bucket;
+    }
+
+    public int totalBuckets() {
+        return totalBuckets;
+    }
+
+    public byte[] dataFileMeta() {
+        return dataFileMeta;
+    }
+}