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https://issues.apache.org/jira/browse/PHOENIX-5956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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chenglei reassigned PHOENIX-5956:
---------------------------------
Assignee: chenglei
> Optimize LeftSemiJoin For SortMergeJoin
> ----------------------------------------
>
> Key: PHOENIX-5956
> URL: https://issues.apache.org/jira/browse/PHOENIX-5956
> Project: Phoenix
> Issue Type: Improvement
> Affects Versions: 4.15.0
> Reporter: chenglei
> Assignee: chenglei
> Priority: Major
> Fix For: 5.1.0, 4.16.0
>
> Attachments: PHOENIX-5956_v1-4.x.patch
>
>
> When LHS left semi join RHS through SortMergeJoin, if RHS is end and returns
> null, then the left semi join could end early, but for
> {{SortMergeJoinPlan.SemiAntiJoinIterator}} , it would continue until LHS is
> exhausted even if RHS returns null, which is unnecessary.
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