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Posted to issues@hive.apache.org by "Vineet Garg (Jira)" <ji...@apache.org> on 2019/12/12 12:41:00 UTC

[jira] [Updated] (HIVE-22637) Avoid cost based rules during generating expressions from AST

     [ https://issues.apache.org/jira/browse/HIVE-22637?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vineet Garg updated HIVE-22637:
-------------------------------
    Description: genExprNode uses default dispatcher which fire rules based on cost, computation of cost is expensive and is likely un-necessary.  (was: genExprNode uses default dispatcher which fire rules based on cost, computation of cost is expensive and looks un-necessary.)

> 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
>
> genExprNode uses default dispatcher which fire rules based on cost, computation of cost is expensive and is likely un-necessary.



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