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From "Harish Butani (JIRA)" <>
Subject [jira] [Created] (HIVE-4186) NPE in ReduceSinkDeDuplication
Date Fri, 15 Mar 2013 19:18:13 GMT
Harish Butani created HIVE-4186:

             Summary: NPE in ReduceSinkDeDuplication
                 Key: HIVE-4186
             Project: Hive
          Issue Type: Bug
          Components: Query Processor
            Reporter: Harish Butani

When you have a sequence of RedueSinks on constants you get this error:
	at org.apache.hadoop.hive.ql.optimizer.ReduceSinkDeDuplication$ReduceSinkDeduplicateProcFactory$ReducerReducerProc.getPartitionAndKeyColumnMapping(

The e.g. to generate this si:
select p_name from (select p_name from part distribute by 1 sort by 1) p distribute by 1 sort
by 1

Sorry for the contrived e.g., but this actually happens when we stack windowing clauses (see
PTF-Windowing branch)

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