[Feature][CDCSOURCE] supports computed column

[melin]

Search before asking

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

Description

支持计算列，类似如下的add column 语法：

CREATE TABLE IF NOT EXISTS user
WITH ('jdbcWriteBatchSize' = '1024')
AS TABLE mysql.`wp.*`.`user[0-9]+`
/*+ OPTIONS('server-id'='8001-8004') */
ADD COLUMN (
  `t_idx` AS COALESCE(SPLIT_INDEX(`tbl`, 'r', 1), 'default') FIRST,
  `c_id` AS `id` + 10 AFTER `id`
);

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

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

[Zzm0809]

有实现方案吗？？

[aiwenmo]

This feature is relatively simple to implement. If you are interested, please contact the community to discuss the specific logic and contribution code.

[github-actions[bot]]

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。