public static boolean isSchemaChangeEvent(SourceRecord sourceRecord) {
        Schema keySchema = sourceRecord.keySchema();
        return keySchema != null && (keySchema.name().matches(SCHEMA_CHANGE_EVENT_KEY_NAME));
    }
Whether the source Record is a schema change event.
@param sourceRecord
@return ture if the source Record is a schema change event.
inlong-sort/sort-flink/cdc-base/src/main/java/org/apache/inlong/sort/cdc/base/util/RecordUtils.java