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https://issues.apache.org/jira/browse/HIVE-15757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Krisztian Kasa resolved HIVE-15757.
-----------------------------------
Resolution: Fixed
Pushed to master. Thanks [~jcamachorodriguez] for review.
> Allow EXISTS/NOT EXISTS correlated subquery with aggregates
> -----------------------------------------------------------
>
> Key: HIVE-15757
> URL: https://issues.apache.org/jira/browse/HIVE-15757
> Project: Hive
> Issue Type: Sub-task
> Components: Query Planning
> Reporter: Vineet Garg
> Assignee: Krisztian Kasa
> Priority: Major
> Labels: pull-request-available, sub-query
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Currently HIVE doesn't allow correlated EXISTS/NOT EXISTS subqueries which
> has aggregate without group by e.g.
> {code} select *
> from src b
> where exists
> (select count(*)
> from src a
> where b.value = a.value and a.key = b.key and a.value > 'val_9'
> ) ;
> {code}
> Such queries could be rewritten to replace EXISTS/NOT EXISTS predicate with
> {{true}} or {{false}} based on aggregate.
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