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From "Siying Dong (JIRA)" <>
Subject [jira] Commented: (HIVE-1750) Remove Partition Filtering Conditions when Possible
Date Tue, 02 Nov 2010 18:40:29 GMT


Siying Dong commented on HIVE-1750:

In the case that at least one partition is a table, the result can be unpredictable. I return
for the corner case since I think it is safer.

> Remove Partition Filtering Conditions when Possible
> ---------------------------------------------------
>                 Key: HIVE-1750
>                 URL:
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Siying Dong
>            Assignee: Siying Dong
>         Attachments: HIVE-1750.1.patch, HIVE-1750.2.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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