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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2016/01/12 03:12:39 UTC

[jira] [Updated] (SPARK-12605) Pushing Join Predicates Through Union All

     [ https://issues.apache.org/jira/browse/SPARK-12605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Reynold Xin updated SPARK-12605:
--------------------------------
    Component/s: Optimizer

> Pushing Join Predicates Through Union All
> -----------------------------------------
>
>                 Key: SPARK-12605
>                 URL: https://issues.apache.org/jira/browse/SPARK-12605
>             Project: Spark
>          Issue Type: Improvement
>          Components: Optimizer, SQL
>    Affects Versions: 1.6.0
>            Reporter: Xiao Li
>
> When selectivity of Join predicates is high, we can push join through union all.



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