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

["Wei Huang (JIRA)" <ji...@apache.org>]

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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