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https://issues.apache.org/jira/browse/SPARK-22694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16278508#comment-16278508
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Apache Spark commented on SPARK-22694:
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User 'mgaido91' has created a pull request for this issue:
https://github.com/apache/spark/pull/19897

> Avoid the generation of useless mutable states by regexp functions
> ------------------------------------------------------------------
>
>                 Key: SPARK-22694
>                 URL: https://issues.apache.org/jira/browse/SPARK-22694
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Marco Gaido
>
> Some regexp functions are defining mutable states which are not needed. This 
> is bad for the well known issues related to constant pool limits.
> I will submit a PR soon.



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