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From "Ashish Thusoo (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-578) Refactor partition pruning code as an optimizer transformation
Date Thu, 06 Aug 2009 22:56:14 GMT

     [ https://issues.apache.org/jira/browse/HIVE-578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ashish Thusoo updated HIVE-578:
-------------------------------

    Attachment: patch-578_3.txt

New patch where the ppr is controlled by a boolean parameter. It kicks in only if ppd and
ppr are both true. If any one of them are not true the AST based approach is used.

> Refactor partition pruning code as an optimizer transformation
> --------------------------------------------------------------
>
>                 Key: HIVE-578
>                 URL: https://issues.apache.org/jira/browse/HIVE-578
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.3.0
>            Reporter: Ashish Thusoo
>            Assignee: Ashish Thusoo
>         Attachments: patch-578.txt, patch-578_1.txt, patch-578_2.txt, patch-578_3.txt
>
>
> Some bugs with partition pruning have been reported and the correct fix for many of them
is to rewrite the partition pruning code as an optimizer transformation which gets kicked
in after the predicate pushdown code. This refactor also uses the graph walker framework so
that the partition pruning code gets consolidated well with the frameworks and does not work
on the query block but rather works on the operator tree.

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