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https://issues.apache.org/jira/browse/HIVE-22637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16995381#comment-16995381
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Vineet Garg commented on HIVE-22637:
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[~jcamachorodriguez] Can you take a look please?
> Avoid cost based rules during generating expressions from AST
> -------------------------------------------------------------
>
> Key: HIVE-22637
> URL: https://issues.apache.org/jira/browse/HIVE-22637
> Project: Hive
> Issue Type: Improvement
> Components: Query Planning
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
> Attachments: HIVE-22637.1.patch, HIVE-22637.2.patch
>
>
> genExprNode uses default dispatcher which fire rules based on cost,
> computation of cost is expensive and is likely un-necessary.
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