[Feature Request]: 希望能可以拿到SQL中支持的字符有哪些的文档

[xiaoshuwei]

Is there an existing issue for the same feature request?

• [X] I have checked the existing issues.

Is your feature request related to a problem?

目前创建发布的SQL为：
prepare sql_content from create publication pub123 database testb account 018f5646_c2ad_7e36_becd_2f1db35fb30c,test_instance_id  comment "123";
修改发布的comment的SQL为：
alter publication pub2 comment "this is pub2";

其中comment的支持哪些字符，需要一个list。

Describe the feature you'd like

如上

Describe implementation you've considered

No response

Documentation, Adoption, Use Case, Migration Strategy

No response

Additional information

No response