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Posted to issues@spark.apache.org by "Liang-Chi Hsieh (JIRA)" <ji...@apache.org> on 2017/02/08 04:31:41 UTC

[jira] [Closed] (SPARK-18824) Add optimizer rule to reorder expensive Filter predicates like ScalaUDF

     [ https://issues.apache.org/jira/browse/SPARK-18824?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Liang-Chi Hsieh closed SPARK-18824.
-----------------------------------
    Resolution: Won't Fix

> Add optimizer rule to reorder expensive Filter predicates like ScalaUDF
> -----------------------------------------------------------------------
>
>                 Key: SPARK-18824
>                 URL: https://issues.apache.org/jira/browse/SPARK-18824
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Liang-Chi Hsieh
>
> During evaluation of predicates in Filter, we can reorder the expressions in order to evaluate the more expensive expressions like ScalaUDF later. So if other expressions are evaluated to false, we can avoid evaluation of these UDFs.
> We can add an optimizer rule to do this optimization.



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