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Posted to issues@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2015/11/20 00:15:10 UTC

[jira] [Commented] (HIVE-12356) Capture if a rule mutated the plan.

    [ https://issues.apache.org/jira/browse/HIVE-12356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15014706#comment-15014706 ] 

Sergey Shelukhin commented on HIVE-12356:
-----------------------------------------

Needed for 2.0?

> Capture if a rule mutated the plan.
> -----------------------------------
>
>                 Key: HIVE-12356
>                 URL: https://issues.apache.org/jira/browse/HIVE-12356
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 1.2.0
>            Reporter: Laljo John Pullokkaran
>            Assignee: Laljo John Pullokkaran
>
> Currently Hive Optimizer doesn't capture if a rule mutated the plan.
> This info could be useful in:
> 1. determining if a subsequent optimization rule needs to be run or not
>    (Ex if Constant propagation didn't mutate plan, then don't run subsequent PPD)
> 2. Explain can contain info about which optimizations are applied effectively on the query.



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