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https://issues.apache.org/jira/browse/TRAFODION-25?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14717503#comment-14717503
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ASF GitHub Bot commented on TRAFODION-25:
-----------------------------------------
Github user DaveBirdsall commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/68#discussion_r38144507
--- Diff: core/sql/regress/compGeneral/TEST071 ---
@@ -4,6 +4,26 @@
-- Simple test case to set up a table with computed col key prefix,
-- do simple inserts, updates, deletes, merges.
-------------------------------------------------------------------------
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--- End diff --
Note to reviewers: I spent some time trying to design a test case for these
changes, but found it difficult due to the many CQDs we introduce in the
Regress environment. So I decided to defer this to the next check-in. But while
I was fiddling with test cases, I noticed this one test lacking a copyright.
> 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
> 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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