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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-14781) Support subquery in nested predicates
Date Sun, 01 May 2016 08:00:20 GMT

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

Apache Spark reassigned SPARK-14781:
------------------------------------

    Assignee: Davies Liu  (was: Apache Spark)

> 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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