[jira] [Created] (HIVE-11619) For GenericUDAFs, iterate function is called despite empty table

[Wei Huang (JIRA)]

Wei Huang created HIVE-11619:
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             Summary: For GenericUDAFs, iterate function is called despite 
empty table
                 Key: HIVE-11619
                 URL: https://issues.apache.org/jira/browse/HIVE-11619
             Project: Hive
          Issue Type: Bug
          Components: API, Hive
         Environment: HDP 2.3
            Reporter: Wei Huang



For empty input tables, the iterate function in GenericUDAF is called once with 
a null input for empty table. This makes it impossible to differentiate the 
empty table case for the case where there the table has one row with a null in 
the desired column.

This happens only when the genericUDAFcall is made with a column name specified 
and not when the '*' wild card in used.




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