[hotfix][pipeline-connector][mysql] Fix missed optional option in MySqlDataSourceFactory

This closes #3867

Author: qg-lin

flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-mysql/src/main/java/org/apache/flink/cdc/connectors/mysql/factory/MySqlDataSourceFactory.java

@@ -335,6 +335,7 @@ public Set<ConfigOption<?>> optionalOptions() {
         options.add(METADATA_LIST);
         options.add(INCLUDE_COMMENTS_ENABLED);
         options.add(USE_LEGACY_JSON_FORMAT);
+        options.add(TREAT_TINYINT1_AS_BOOLEAN_ENABLED);
         return options;
     }
 

flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-mysql/src/test/java/org/apache/flink/cdc/connectors/mysql/source/MySqlDataSourceFactoryTest.java

@@ -43,6 +43,7 @@
 import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.SCAN_INCREMENTAL_SNAPSHOT_CHUNK_KEY_COLUMN;
 import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.TABLES;
 import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.TABLES_EXCLUDE;
+import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.TREAT_TINYINT1_AS_BOOLEAN_ENABLED;
 import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.USERNAME;
 import static org.apache.flink.cdc.connectors.mysql.source.config.MySqlSourceOptions.SCAN_NEWLY_ADDED_TABLE_ENABLED;
 import static org.apache.flink.cdc.connectors.mysql.testutils.MySqSourceTestUtils.TEST_PASSWORD;
@@ -245,6 +246,28 @@ public void testUnsupportedOption() {
                                 + "unsupported_key");
     }
 
+    @Test
+    public void testOptionalOption() {
+        inventoryDatabase.createAndInitialize();
+        Map<String, String> options = new HashMap<>();
+        options.put(HOSTNAME.key(), MYSQL_CONTAINER.getHost());
+        options.put(PORT.key(), String.valueOf(MYSQL_CONTAINER.getDatabasePort()));
+        options.put(USERNAME.key(), TEST_USER);
+        options.put(PASSWORD.key(), TEST_PASSWORD);
+        options.put(TABLES.key(), inventoryDatabase.getDatabaseName() + ".prod\\.*");
+
+        // optional option
+        options.put(TREAT_TINYINT1_AS_BOOLEAN_ENABLED.key(), "false");
+
+        Factory.Context context = new MockContext(Configuration.fromMap(options));
+        MySqlDataSourceFactory factory = new MySqlDataSourceFactory();
+        assertThat(factory.optionalOptions().contains(TREAT_TINYINT1_AS_BOOLEAN_ENABLED))
+                .isEqualTo(true);
+
+        MySqlDataSource dataSource = (MySqlDataSource) factory.createDataSource(context);
+        assertThat(dataSource.getSourceConfig().isTreatTinyInt1AsBoolean()).isEqualTo(false);
+    }
+
     @Test
     public void testPrefixRequireOption() {
         inventoryDatabase.createAndInitialize();