Vineet Garg created HIVE-16809:
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Summary: Improve filter condition for correlated subqueries
Key: HIVE-16809
URL: https://issues.apache.org/jira/browse/HIVE-16809
Project: Hive
Issue Type: Improvement
Reporter: Vineet Garg
Assignee: Vineet Garg
A filter condition such as {{col1=col1}} generated during rewrite of subqueries
is not folded/rewritten into {{co1 is not null}}. This messes up the statistic
estimation and could result in bad plans.
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