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From "Siying Dong (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-1750) Remove Partition Filtering Conditions when Possible
Date Wed, 03 Nov 2010 23:45:25 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1750?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Siying Dong updated HIVE-1750:
------------------------------

    Attachment: HIVE-1750.4.patch

1. fix two small bugs
2. add test cases Namit mentioned
3. addressing Amareshwari's comment: add put() after PartitionPruner.prune() in SemanticAnalyzer.java

> Remove Partition Filtering Conditions when Possible
> ---------------------------------------------------
>
>                 Key: HIVE-1750
>                 URL: https://issues.apache.org/jira/browse/HIVE-1750
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Siying Dong
>            Assignee: Siying Dong
>         Attachments: HIVE-1750.1.patch, HIVE-1750.2.patch, HIVE-1750.3.patch, HIVE-1750.4.patch
>
>
> For some simple queries, partition filtering constraints take 8% of CPU time (now 16%
since we filter twice) even if the result is always true. When possible, we should remove
these constraints to save CPU times.

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