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From "Harish Butani (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7283) CBO: plumb in HepPlanner and FieldTrimmer(ColumnPruner) into Optiq based planning
Date Sat, 28 Jun 2014 03:32:24 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14046718#comment-14046718
] 

Harish Butani commented on HIVE-7283:
-------------------------------------

For now have added checks to prevent PredicatePushdown and ColumnPruning for SemiJoins.
Test passes now.

> CBO: plumb in HepPlanner and FieldTrimmer(ColumnPruner) into Optiq based planning
> ---------------------------------------------------------------------------------
>
>                 Key: HIVE-7283
>                 URL: https://issues.apache.org/jira/browse/HIVE-7283
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor
>            Reporter: Harish Butani
>            Assignee: Harish Butani
>         Attachments: HIVE-7283.1.patch, HIVE-7283.2.patch
>
>
> 1.
> HepPlanner initially used for:
> - Predicate Pushdown
> - Transitive Predicate inference
> - Partition Pruning
> 2. Use Optiq's FieldTrimmer for ColumnPruner
> To begin with the rules are copies of Optiq base rules. Once Optiq is refactored to work
on Base RelNode classes, the copied rules will be removed.



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