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Posted to issues@flink.apache.org by "LuNing Wang (Jira)" <ji...@apache.org> on 2022/07/07 09:47:00 UTC

[jira] [Commented] (FLINK-28444) Support SUBSTR without parameter in SQL and Table API

    [ https://issues.apache.org/jira/browse/FLINK-28444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17563662#comment-17563662 ] 

LuNing Wang commented on FLINK-28444:
-------------------------------------

I would like to take this.

> Support SUBSTR without parameter in SQL and Table API
> -----------------------------------------------------
>
>                 Key: FLINK-28444
>                 URL: https://issues.apache.org/jira/browse/FLINK-28444
>             Project: Flink
>          Issue Type: Improvement
>          Components: API / Python, Table SQL / API
>    Affects Versions: 1.15.1
>            Reporter: LuNing Wang
>            Priority: Major
>
> SUBSTR() support without parameter in the doc, but the code only supports SUBSTR(STRING, INT1) and SUBSTR(STRING, INT1, INT2). We should also support SUBSTR()
> We can use new built-in function stack to rewrite `generateSubString` method.



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