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https://issues.apache.org/jira/browse/TAJO-1991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15055192#comment-15055192
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ASF GitHub Bot commented on TAJO-1991:
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Github user hyunsik commented on the pull request:
https://github.com/apache/tajo/pull/901#issuecomment-164305800
I rebased and fixed all tests. It is ready to review.
> Tablespace::getVolume should take filter predication
> ----------------------------------------------------
>
> Key: TAJO-1991
> URL: https://issues.apache.org/jira/browse/TAJO-1991
> Project: Tajo
> Issue Type: Improvement
> Components: Storage
> Reporter: Hyunsik Choi
> Assignee: Hyunsik Choi
> Fix For: 0.12.0, 0.11.1
>
>
> {{Tablespace::getVolume}} plays a role to guess or compute exactly the table
> volume. This volume result is usually used for join optimization. But,
> currently {{Tablespace::getVolume}} just returns whole table volume. It may
> cause sub optimal join order, especially in partitioned tables or indexable
> tables like HBase.
> The main objective of this patch is to improve {{getVolume}} method to take
> filter predicates and return more reasonable volume sizes according to
> predicates.
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