[Feature] Flink CDC multi-table synchronization supports setting calculated fields

[melin]

Search before asking

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

Description

参考阿里云flink cats 语法，支持添加计算字段

https://help.aliyun.com/document_detail/374303.html

Use case

No response

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

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

[github-actions]

Hello, this issue has not been active for more than 30 days. This issue will be closed in 7 days if there is no response. If you have any questions, you can comment and reply.

你好, 这个 issue 30 天内没有活跃，7 天后将关闭，如需回复，可以评论回复。