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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2020/05/06 04:03:00 UTC

[jira] [Commented] (SPARK-31647) Deprecate 'spark.sql.optimizer.metadataOnly'

    [ https://issues.apache.org/jira/browse/SPARK-31647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17100440#comment-17100440 ] 

Apache Spark commented on SPARK-31647:
--------------------------------------

User 'HyukjinKwon' has created a pull request for this issue:
https://github.com/apache/spark/pull/28459

> Deprecate 'spark.sql.optimizer.metadataOnly'
> --------------------------------------------
>
>                 Key: SPARK-31647
>                 URL: https://issues.apache.org/jira/browse/SPARK-31647
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Hyukjin Kwon
>            Assignee: Hyukjin Kwon
>            Priority: Major
>
> This optimization can cause a potential correctness issue, see also SPARK-26709.
> Also, it seems difficult to extend the optimization. Basically you should whitelist all available functions.
> Seems we should rather deprecate and remove this.



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