[jira] [Updated] (HIVE-24598) Trim function should return null if any of its parameter is null

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-24598?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated HIVE-24598:
----------------------------------
    Labels: newbie pull-request-available  (was: newbie)

> Trim function should return null if any of its parameter is null
> ----------------------------------------------------------------
>
>                 Key: HIVE-24598
>                 URL: https://issues.apache.org/jira/browse/HIVE-24598
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Krisztian Kasa
>            Priority: Minor
>              Labels: newbie, pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Hive throws exception when null is passed as a parameter of trim/rtrim/ltrim
> {code}
> select trim(null);
> {code}
> {code}
> org.apache.hadoop.hive.ql.parse.SemanticException: Line 1:7 Wrong arguments 'TOK_NULL': trim takes only STRING/CHAR/VARCHAR types. Found VOID
> {code} 
> However null should be returned. From SQL11 standard:
>  a) Let S be the value of the <trim source>.
>  b) If <trim character> is specified, then let SC be the value of <trim character>; otherwise, let SC be
> <space>.
> c) If at least one of S and SC is the null value, then the result of the <trim function> is the null value.



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