Search before asking

• I had searched in the issues and found no similar issues.

What happened

从mysql或者其他关系型数据库到iceberg进行交换任务时，不支持设置任务模式，比如覆盖或者追加不生效。

What you expected to happen

从mysql或者其他关系型数据库到iceberg进行交换任务时，不支持设置任务模式，比如覆盖或者追加不生效。

How to reproduce

从mysql或者其他关系型数据库到iceberg进行交换任务时，设置任务模式，比如覆盖或者追加不生效。

Anything else

No response

Version

1.12_release

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct