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https://issues.apache.org/jira/browse/HIVE-21395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16801232#comment-16801232
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Jesus Camacho Rodriguez edited comment on HIVE-21395 at 3/25/19 11:28 PM:
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[~vgarg], patch LGTM. However, can you remove {{some}} from the operand
matching? Aggregate or Project operators have a single inputs, thus it is not
needed.
was (Author: jcamachorodriguez):
[~vgarg], patch LGTM. However, can you remove {{some}} from the operand
matching? Aggregate has a single input, thus it is not needed.
> Refactor HiveSemiJoinRule
> -------------------------
>
> Key: HIVE-21395
> URL: https://issues.apache.org/jira/browse/HIVE-21395
> Project: Hive
> Issue Type: Improvement
> Components: Query Planning
> Affects Versions: 4.0.0
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
> Attachments: HIVE-21395.1.patch
>
>
> Following refactoring needs to be done:
> * Update the rule matching pattern to avoid using HepVertex
> * HIVE-21338 adds logic to determine if rel plan will produce at most one
> row. Use this in HiveSemiJoinRule
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