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https://issues.apache.org/jira/browse/TRAFODION-25?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14979475#comment-14979475
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ASF GitHub Bot commented on TRAFODION-25:
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GitHub user DaveBirdsall opened a pull request:
https://github.com/apache/incubator-trafodion/pull/150
[TRAFODION-25] Fix bug preventing fully parallelized DELETEs
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/DaveBirdsall/incubator-trafodion DeletePlanFix
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-trafodion/pull/150.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 #150
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commit 10d80035ae0803d9156da381a418dccc8b264186
Author: Dave Birdsall <[email protected]>
Date: 2015-10-28T23:24:24Z
[TRAFODION-25] Fix bug preventing fully parallelized DELETEs
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> Insert, delete and update operators should use specialized cost method
> -----------------------------------------------------------------------
>
> Key: TRAFODION-25
> URL: https://issues.apache.org/jira/browse/TRAFODION-25
> Project: Apache Trafodion
> Issue Type: Bug
> Components: sql-cmp
> Reporter: Qifan Chen
> Assignee: David Wayne Birdsall
> Labels: performance
>
> In Trafodion, insert, delete and update operators do not use a specialized
> cost method that model the true operation involved.
> As a result, these operators can be assigned a zero cost and the query plan
> may not be optimal. In one example, a delete query against a partitioned
> table may get a serial plan.
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