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https://issues.apache.org/jira/browse/SPARK-22080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16173309#comment-16173309
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Apache Spark commented on SPARK-22080:
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User 'sathiyapk' has created a pull request for this issue:
https://github.com/apache/spark/pull/19295
> Allow developers to add pre-optimisation rules
> ----------------------------------------------
>
> Key: SPARK-22080
> URL: https://issues.apache.org/jira/browse/SPARK-22080
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 2.1.1, 2.2.0
> Reporter: Sathiya Kumar
> Priority: Minor
>
> [SPARK-9843] added support for adding custom rules for optimising
> LogicalPlan, but the added rules are only applied only after all the spark's
> native rules are applied. Allowing users to plug in pre-optimisation rules
> facilitate some advanced optimisation.
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