↓ 3 callersMethodcreateSnapshotSplit(
JdbcConnection jdbc,
MySqlPartition partition,
TableId tableId,
flink-cdc-connect/flink-cdc-source-connectors/flink-connector-mysql-cdc/src/main/java/org/apache/flink/cdc/connectors/mysql/source/assigners/MySqlChunkSplitter.java:361