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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/06/23 20:36:16 UTC
[jira] [Commented] (SPARK-16174) Add RemoveLiteralRepetitionFromIn
optimizer
[ https://issues.apache.org/jira/browse/SPARK-16174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15347131#comment-15347131 ]
Apache Spark commented on SPARK-16174:
--------------------------------------
User 'dongjoon-hyun' has created a pull request for this issue:
https://github.com/apache/spark/pull/13876
> Add RemoveLiteralRepetitionFromIn optimizer
> -------------------------------------------
>
> Key: SPARK-16174
> URL: https://issues.apache.org/jira/browse/SPARK-16174
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Dongjoon Hyun
> Priority: Minor
>
> This issue adds an optimizer to remove the duplicated literals from SQL `IN` predicates. This optimizer prevents user mistakes and also can optimize some queries like [TPCDS-36|https://github.com/apache/spark/blob/master/sql/core/src/test/resources/tpcds/q36.sql#L19].
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