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Posted to issues@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2016/04/22 19:31:12 UTC
[jira] [Commented] (HIVE-13068) Disable Hive ConstantPropagate
optimizer when CBO has optimized the plan II
[ https://issues.apache.org/jira/browse/HIVE-13068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15254281#comment-15254281 ]
Ashutosh Chauhan commented on HIVE-13068:
-----------------------------------------
Any reason you are introducing {{SimpleConstantReduction}} here? Goal is to reduce optimizations on Hive operator, not to increase them : )
> Disable Hive ConstantPropagate optimizer when CBO has optimized the plan II
> ---------------------------------------------------------------------------
>
> Key: HIVE-13068
> URL: https://issues.apache.org/jira/browse/HIVE-13068
> Project: Hive
> Issue Type: Sub-task
> Components: CBO, Logical Optimizer
> Affects Versions: 2.1.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Attachments: HIVE-13068.01.patch, HIVE-13068.01.patch, HIVE-13068.patch
>
>
> After HIVE-12543 went in, we need follow-up work to disable the last call to ConstantPropagate in Hive. This probably implies work on extending the constant folding logic in Calcite.
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