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https://issues.apache.org/jira/browse/HAWQ-239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15049973#comment-15049973
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ASF GitHub Bot commented on HAWQ-239:
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GitHub user zhangh43 opened a pull request:
https://github.com/apache/incubator-hawq/pull/175
HAWQ-239. Reduce the call times of GpPolicy to improve performance on…
… scan empty table.
in get_block_locations_and_claculte_table_size(), GpPolicy is called twice
for each relation, we need to reduce it to zero
This pull request also fix some initialization of blocknum and hitratio
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zhangh43/incubator-hawq hawq239
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-hawq/pull/175.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #175
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commit e66f9ecc63cc0c6f6ec0d7abe133baf3ffba50f6
Author: hubertzhang <[email protected]>
Date: 2015-12-10T03:32:59Z
HAWQ-239. Reduce the call times of GpPolicy to improve performance on scan
empty table.
----
> Reduce the call times of GpPolicy to improve performance on scan empty table.
> -----------------------------------------------------------------------------
>
> Key: HAWQ-239
> URL: https://issues.apache.org/jira/browse/HAWQ-239
> Project: Apache HAWQ
> Issue Type: Improvement
> Components: Core
> Reporter: Hubert Zhang
> Assignee: Hubert Zhang
>
> in get_block_locations_and_claculte_table_size(), GpPolicy is called twice
> for each relation, we need to reduce it to zero
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