Davies Liu created SPARK-14781:
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Summary: 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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