@Override
    protected MySqlSplit toSplitType(String splitId, MySqlSplitState splitState) {
        return splitState.toMySqlSplit();
    }
The source reader for MySQL source splits.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/mysql/source/reader/MySqlSourceReader.java