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https://issues.apache.org/jira/browse/FLINK-32310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17738523#comment-17738523
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Ran Tao commented on FLINK-32310:
---------------------------------

[~luoyuxia] hi. yuxia. Sorry for the late reply. I have submitted this PR, the 
general logic is consistent with your show procedure, there is a little 
difference. Considering the different forms of like, I have given an 
enumeration of like to be compatible with other possible likes in the future. 
If you have time, pls help me to review it.  thanks and sorry again.

> Support enhanced show functions syntax
> --------------------------------------
>
>                 Key: FLINK-32310
>                 URL: https://issues.apache.org/jira/browse/FLINK-32310
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / API, Table SQL / Planner
>            Reporter: Ran Tao
>            Priority: Major
>              Labels: pull-request-available
>
> As FLIP discussed. We will support new syntax for showing functions.
> The syntax:
> | |SHOW [USER] FUNCTIONS [ ( FROM \| IN ) [catalog_name.]database_name ] [ 
> [NOT] (LIKE \| ILIKE) <sql_like_pattern> ]| |



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