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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2016/05/01 09:50:12 UTC

[jira] [Assigned] (SPARK-14781) Support subquery in nested predicates

     [ https://issues.apache.org/jira/browse/SPARK-14781?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Davies Liu reassigned SPARK-14781:
----------------------------------

    Assignee: Davies Liu

> Support subquery in nested predicates
> -------------------------------------
>
>                 Key: SPARK-14781
>                 URL: https://issues.apache.org/jira/browse/SPARK-14781
>             Project: Spark
>          Issue Type: New Feature
>          Components: SQL
>            Reporter: Davies Liu
>            Assignee: Davies Liu
>
> Right now, we does not support nested IN/EXISTS subquery, for example 
> EXISTS( x1) OR EXISTS( x2)
> In order to do that, we could use an internal-only join type SemiPlus, which will output every row from left, plus additional column as the result of join condition. Then we could replace the EXISTS() or IN() by the result column.



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