[starrocks] Escape quoted default/comment literals in DDL

Author: zml1206

flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-starrocks/src/test/java/org/apache/flink/cdc/connectors/starrocks/sink/StarRocksMetadataApplierITCase.java

@@ -101,7 +101,9 @@ private List<Event> generateAddColumnEvents(TableId tableId) {
                 Schema.newBuilder()
                         .column(new PhysicalColumn("id", DataTypes.INT().notNull(), null))
                         .column(new PhysicalColumn("number", DataTypes.DOUBLE(), null))
-                        .column(new PhysicalColumn("name", DataTypes.VARCHAR(17), null))
+                        .column(
+                                new PhysicalColumn(
+                                        "name", DataTypes.VARCHAR(17), "\"name\"", "\"\""))
                         .primaryKey("id")
                         .build();
 
@@ -123,9 +125,16 @@ private List<Event> generateAddColumnEvents(TableId tableId) {
                         Collections.singletonList(
                                 new AddColumnEvent.ColumnWithPosition(
                                         new PhysicalColumn(
-                                                "extra_decimal",
-                                                DataTypes.DECIMAL(17, 0),
-                                                null)))));
+                                                "extra_decimal", DataTypes.DECIMAL(17, 0), null)))),
+                new AddColumnEvent(
+                        tableId,
+                        Collections.singletonList(
+                                new AddColumnEvent.ColumnWithPosition(
+                                        new PhysicalColumn(
+                                                "extra_string",
+                                                DataTypes.VARCHAR(17),
+                                                "\"extra_string\"",
+                                                "\"\"")))));
     }
 
     private List<Event> generateDropColumnEvents(TableId tableId) {
@@ -285,10 +294,11 @@ void testStarRocksAddColumn() throws Exception {
                 Arrays.asList(
                         "id | int | NO | true | null",
                         "number | double | YES | false | null",
-                        "name | varchar(51) | YES | false | null",
+                        "name | varchar(51) | YES | false | \"\"",
                         "extra_date | date | YES | false | null",
                         "extra_bool | boolean | YES | false | null",
-                        "extra_decimal | decimal(17,0) | YES | false | null");
+                        "extra_decimal | decimal(17,0) | YES | false | null",
+                        "extra_string | varchar(51) | YES | false | \"\"");
 
         assertEqualsInOrder(expected, actual);
     }