[jira] [Created] (HIVE-18173) Improve plans for correlated subqueries with non-equi predicate

["Vineet Garg (JIRA)" <ji...@apache.org>]

Vineet Garg created HIVE-18173:
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             Summary: Improve plans for correlated subqueries with non-equi predicate
                 Key: HIVE-18173
                 URL: https://issues.apache.org/jira/browse/HIVE-18173
             Project: Hive
          Issue Type: Improvement
          Components: Query Planning
            Reporter: Vineet Garg
            Assignee: Vineet Garg


HIVE-17767 optimized plan to not generate value generator (i.e. an extra join with outer query to fetch correlated columns) for EQUAL and NOT EQUAL predicates e.g.
{code:sql}
select * from src b where b.key in (select key from src a where b.value <> a.value)
{code}

This should be improved and implemented for rest of the predicates e.g. LESS THAN etc



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