[jira] [Updated] (FLINK-21774) Display result of all the SHOW command in tableau format

["Jark Wu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-21774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jark Wu updated FLINK-21774:
----------------------------
    Summary: Display result of all the SHOW command in tableau format  (was: Do not display column names when return set is emtpy in SQL Client)

> Display result of all the SHOW command in tableau format
> --------------------------------------------------------
>
>                 Key: FLINK-21774
>                 URL: https://issues.apache.org/jira/browse/FLINK-21774
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / Client
>            Reporter: Jark Wu
>            Assignee: Nicholas Jiang
>            Priority: Major
>              Labels: pull-request-available
>
> Currently, SQL Client will display column names even if the return set is empty:
> {code}
> SHOW MODULES;
> +-------------+
> | module name |
> +-------------+
> 0 row in set
> !ok
> {code}
> In mature databases, e.g. MySQL, they only show "Empty Set" instead of column names:
> {code}
> mysql> show tables;
> Empty set (0.00 sec)
> {code}
> We can improve this by simply omit the column names header. 



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