[cdc] Add flink execution mode check for cdc table sync action.

paimon-flink/paimon-flink-cdc/src/main/java/org/apache/paimon/flink/action/cdc/SynchronizationActionBase.java

@@ -32,10 +32,12 @@
 import org.apache.paimon.schema.SchemaChange;
 import org.apache.paimon.table.FileStoreTable;
 
+import org.apache.flink.api.common.RuntimeExecutionMode;
 import org.apache.flink.api.common.eventtime.WatermarkStrategy;
 import org.apache.flink.api.common.functions.FlatMapFunction;
 import org.apache.flink.api.connector.source.Source;
 import org.apache.flink.configuration.Configuration;
+import org.apache.flink.configuration.ExecutionOptions;
 import org.apache.flink.streaming.api.datastream.DataStream;
 import org.apache.flink.streaming.api.datastream.DataStreamSource;
 import org.apache.flink.streaming.api.functions.source.SourceFunction;
@@ -53,6 +55,7 @@
 import static org.apache.paimon.flink.FlinkConnectorOptions.SCAN_WATERMARK_ALIGNMENT_MAX_DRIFT;
 import static org.apache.paimon.flink.FlinkConnectorOptions.SCAN_WATERMARK_ALIGNMENT_UPDATE_INTERVAL;
 import static org.apache.paimon.flink.FlinkConnectorOptions.SCAN_WATERMARK_IDLE_TIMEOUT;
+import static org.apache.paimon.utils.Preconditions.checkArgument;
 
 /** Base {@link Action} for table/database synchronizing job. */
 public abstract class SynchronizationActionBase extends ActionBase {
@@ -137,6 +140,13 @@ protected CdcTimestampExtractor createCdcTimestampExtractor() {
                 "Unsupported timestamp extractor for current cdc source.");
     }
 
+    protected void validateRuntimeExecutionMode() {
+        checkArgument(
+                env.getConfiguration().get(ExecutionOptions.RUNTIME_MODE)
+                        == RuntimeExecutionMode.STREAMING,
+                "It's only support STREAMING mode for flink-cdc sync table action.");
+    }
+
     private DataStreamSource<CdcSourceRecord> buildDataStreamSource(Object source) {
         if (source instanceof Source) {
             boolean isAutomaticWatermarkCreationEnabled =

paimon-flink/paimon-flink-cdc/src/main/java/org/apache/paimon/flink/action/cdc/mysql/MySqlSyncDatabaseAction.java

@@ -188,6 +188,7 @@ protected CdcTimestampExtractor createCdcTimestampExtractor() {
 
     @Override
     protected MySqlSource<CdcSourceRecord> buildSource() {
+        validateRuntimeExecutionMode();
         return MySqlActionUtils.buildMySqlSource(
                 cdcSourceConfig,
                 tableList(

paimon-flink/paimon-flink-cdc/src/main/java/org/apache/paimon/flink/action/cdc/mysql/MySqlSyncTableAction.java

@@ -102,6 +102,7 @@ protected Schema retrieveSchema() throws Exception {
 
     @Override
     protected MySqlSource<CdcSourceRecord> buildSource() {
+        validateRuntimeExecutionMode();
         String tableList =
                 String.format(
                         "(%s)\\.(%s)",

paimon-flink/paimon-flink-cdc/src/test/java/org/apache/paimon/flink/action/cdc/CdcActionITCaseBase.java

@@ -38,6 +38,7 @@
 import org.apache.paimon.types.RowType;
 
 import org.apache.flink.api.common.JobStatus;
+import org.apache.flink.api.common.RuntimeExecutionMode;
 import org.apache.flink.core.execution.JobClient;
 import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
 import org.junit.jupiter.api.AfterEach;
@@ -214,6 +215,15 @@ protected <T> List<String> nullableToArgs(String argKey, @Nullable T nullable) {
     }
 
     public JobClient runActionWithDefaultEnv(ActionBase action) throws Exception {
+        env.setRuntimeMode(RuntimeExecutionMode.STREAMING);
+        action.withStreamExecutionEnvironment(env).build();
+        JobClient client = env.executeAsync();
+        waitJobRunning(client);
+        return client;
+    }
+
+    public JobClient runActionWithBatchEnv(ActionBase action) throws Exception {
+        env.setRuntimeMode(RuntimeExecutionMode.BATCH);
         action.withStreamExecutionEnvironment(env).build();
         JobClient client = env.executeAsync();
         waitJobRunning(client);

paimon-flink/paimon-flink-cdc/src/test/java/org/apache/paimon/flink/action/cdc/mysql/MySqlSyncTableActionITCase.java

@@ -1497,4 +1497,39 @@ public void testUnknowMysqlScanStartupMode() {
                                         + scanStartupMode
                                         + "'. Valid scan.startup.mode for MySQL CDC are [initial, earliest-offset, latest-offset, specific-offset, timestamp, snapshot]"));
     }
+
+    @Test
+    @Timeout(60)
+    public void testRuntimeExecutionModeCheckForCdcSync() throws Exception {
+        Map<String, String> mySqlConfig = getBasicMySqlConfig();
+        mySqlConfig.put("database-name", "check_cdc_sync_runtime_execution_mode");
+        mySqlConfig.put("table-name", "t");
+
+        Map<String, String> tableConfig = getBasicTableConfig();
+        tableConfig.put(CoreOptions.WRITE_ONLY.key(), "true");
+
+        MySqlSyncTableAction action = syncTableActionBuilder(mySqlConfig).build();
+
+        assertThatThrownBy(() -> runActionWithBatchEnv(action))
+                .satisfies(
+                        anyCauseMatches(
+                                IllegalArgumentException.class,
+                                "It's only support STREAMING mode for flink-cdc sync table action"));
+
+        runActionWithDefaultEnv(action);
+
+        FileStoreTable table = getFileStoreTable();
+
+        try (Statement statement = getStatement()) {
+            statement.executeUpdate("USE check_cdc_sync_runtime_execution_mode");
+            statement.executeUpdate("INSERT INTO t VALUES (1, 'one'), (2, 'two')");
+            RowType rowType =
+                    RowType.of(
+                            new DataType[] {DataTypes.INT().notNull(), DataTypes.VARCHAR(10)},
+                            new String[] {"k", "v1"});
+            List<String> primaryKeys = Collections.singletonList("k");
+            List<String> expected = Arrays.asList("+I[1, one]", "+I[2, two]");
+            waitForResult(expected, table, rowType, primaryKeys);
+        }
+    }
 }

paimon-flink/paimon-flink-cdc/src/test/resources/mysql/sync_table_setup.sql

@@ -445,3 +445,14 @@ CREATE TABLE t (
     k INT PRIMARY KEY,
     v1 VARCHAR(10)
 );
+
+-- ################################################################################
+--  testRuntimeExecutionModeCheckForCdcSync
+-- ################################################################################
+
+CREATE DATABASE check_cdc_sync_runtime_execution_mode;
+USE check_cdc_sync_runtime_execution_mode;
+CREATE TABLE t (
+                   k INT PRIMARY KEY,
+                   v1 VARCHAR(10)
+);