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From "Takeshi Yamamuro (Jira)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-28036) Support negative length at LEFT/RIGHT SQL functions
Date Sun, 29 Dec 2019 11:26:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-28036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17004748#comment-17004748
] 

Takeshi Yamamuro commented on SPARK-28036:
------------------------------------------

I'll close this for now because I cannot find a strong reason to support this. If necessary,
please reopen this.

> Support negative length at LEFT/RIGHT SQL functions
> ---------------------------------------------------
>
>                 Key: SPARK-28036
>                 URL: https://issues.apache.org/jira/browse/SPARK-28036
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Yuming Wang
>            Priority: Major
>
> PostgreSQL:
> {code:sql}
> postgres=# select left('ahoj', -2), right('ahoj', -2);
>  left | right 
> ------+-------
>  ah   | oj
> (1 row)
> {code}
> Spark SQL:
> {code:sql}
> spark-sql> select left('ahoj', -2), right('ahoj', -2);
> spark-sql>
> {code}



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