[ https://issues.apache.org/jira/browse/SPARK-14781?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Apache Spark reassigned SPARK-14781:
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Assignee: Apache Spark (was: 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: Apache Spark
>
> 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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