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Yuepeng Pan edited comment on FLINK-22315 at 10/16/21, 9:48 AM: ---------------------------------------------------------------- '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 > -- This message was sent by Atlassian Jira (v8.3.4#803005)