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https://issues.apache.org/jira/browse/DRILL-4083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15003494#comment-15003494
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ASF GitHub Bot commented on DRILL-4083:
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GitHub user hsuanyi opened a pull request:
https://github.com/apache/drill/pull/253
DRILL-4083: ScanPrel's CPU cost should not be zero even if column cou…
…nt is zero
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/hsuanyi/incubator-drill DRILL-4083
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/253.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 #253
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commit 736057564b70ff14b14b9ed3f5419979169d6fac
Author: Hsuan-Yi Chu <[email protected]>
Date: 2015-11-12T23:01:10Z
DRILL-4083: ScanPrel's CPU cost should not be zero even if column count is
zero
----
> Drill not using HiveDrillNativeParquetScan if no column is needed to be read
> from HIVE
> --------------------------------------------------------------------------------------
>
> Key: DRILL-4083
> URL: https://issues.apache.org/jira/browse/DRILL-4083
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - Hive
> Reporter: Sean Hsuan-Yi Chu
> Assignee: Sean Hsuan-Yi Chu
>
> For example, for a query such as:
> {code}
> Select count(*) from hive.parquetTable
> {code}
> would not use HiveDrillNativeParquetScan. However, the following query will
> use:
> {code}
> Select count(*) from hive.parquetTable where column > 0
> {code}
> Ideally, both should use the same HiveDrillNativeParquetScan
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