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https://issues.apache.org/jira/browse/TRAFODION-2270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15646108#comment-15646108
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ASF GitHub Bot commented on TRAFODION-2270:
-------------------------------------------
Github user zellerh commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/795#discussion_r86907546
--- Diff: core/sql/optimizer/OptPhysRelExpr.cpp ---
@@ -11856,6 +11868,7 @@ SortGroupBy::synthPhysicalProperty(const Context*
myContext,
planNumber,
pws);
+ //PhysicalProperty(((isRollup() ||NOT extraOrderExpr().isEmpty()) ?
ValueIdList() : sppOfChild->getSortKey()),
--- End diff --
Could you remove this dead code?
> support ORDER BY clause in GROUP_CONCAT function
> ------------------------------------------------
>
> Key: TRAFODION-2270
> URL: https://issues.apache.org/jira/browse/TRAFODION-2270
> Project: Apache Trafodion
> Issue Type: Sub-task
> Reporter: liu ming
> Assignee: liu ming
>
> currently, GROUP_CONCAT() in Trafodion cannot recognize order by clause, need
> to support it.
> for example:
> SELECT student_name,
> GROUP_CONCAT(DISTINCT test_score
> ORDER BY test_score asc SEPARATOR ' ')
> FROM student
> GROUP BY student_name;
>
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