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https://issues.apache.org/jira/browse/FLINK-22315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17429247#comment-17429247
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Yuepeng Pan edited comment on FLINK-22315 at 10/16/21, 9:48 AM:
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'alter table add constraint' syntax is availiable 
[here|https://github.com/apache/flink/blob/fe59485be2ae2b576cbd252e78cc6f0d36ce090b/flink-table/flink-sql-parser/src/main/codegen/includes/parserImpls.ftl#L534]
 .
So, we just support extra 'ADD column / watermark'  for ALTER TABLE statement, 
IMO.

There is a minor question about 'ADD column ' syntax. Should the syntax  
support adding multiple columns at one time ?
Please let me know what do you [~jark] [~airblader]  think about it . Thank you.


was (Author: rocmarshal):
'alter table add constraint' syntax is availiable 
[here|https://github.com/apache/flink/blob/fe59485be2ae2b576cbd252e78cc6f0d36ce090b/flink-table/flink-sql-parser/src/main/codegen/includes/parserImpls.ftl#L534]
 .
So, we just support extra 'ADD column / watermark'  for ALTER TABLE statement, 
IMO.

There is a minor question about 'ADD column ' syntax. Should the syntax  
support adding multiple columns at one time ?

> Support ADD column/constraint/watermark for ALTER TABLE statement
> -----------------------------------------------------------------
>
>                 Key: FLINK-22315
>                 URL: https://issues.apache.org/jira/browse/FLINK-22315
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / API
>            Reporter: Jark Wu
>            Assignee: Yuepeng Pan
>            Priority: Major
>




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