[jira] [Created] (HAWQ-858) Fix parser to understand case / when expression in group by

[Venkatesh (JIRA)]

Venkatesh created HAWQ-858:
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             Summary: Fix parser to understand case / when expression in group 
by
                 Key: HAWQ-858
                 URL: https://issues.apache.org/jira/browse/HAWQ-858
             Project: Apache HAWQ
          Issue Type: Bug
          Components: Parser
            Reporter: Venkatesh
            Assignee: Lei Chang


[~lei_chang] please port this parser changes into HAWQ

https://github.com/greenplum-db/gpdb4/commit/30b33a10f4b0a4468a9ed80cf3779fd12f176abf



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