[jira] [Commented] (FLINK-24586) SQL functions should return STRING instead of VARCHAR(2000)

["liwei li (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-24586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17431015#comment-17431015 ] 

liwei li commented on FLINK-24586:
----------------------------------

I'm interested in changing the return of JSON functions, can I have this ticket and start writing JSON-related code first?

> SQL functions should return STRING instead of VARCHAR(2000)
> -----------------------------------------------------------
>
>                 Key: FLINK-24586
>                 URL: https://issues.apache.org/jira/browse/FLINK-24586
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / API
>            Reporter: Ingo Bürk
>            Priority: Major
>
> There are some SQL functions which currently return VARCHAR(2000). With more strict CAST behavior from FLINK-24413, this could become an issue.
> The following functions return VARCHAR(2000) and should be changed to return STRING instead:
> * JSON_VALUE
> * JSON_QUERY
> * JSON_OBJECT
> * JSON_ARRAY
> There are also some more functions which should be evaluated:
> * CHR
> * REVERSE
> * SPLIT_INDEX
> * PARSE_URL
> * FROM_UNIXTIME
> * DECODE



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