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Posted to dev@hive.apache.org by "Harish Butani (JIRA)" <ji...@apache.org> on 2013/03/15 20:18:13 UTC

[jira] [Created] (HIVE-4186) NPE in ReduceSinkDeDuplication

Harish Butani created HIVE-4186:
-----------------------------------

             Summary: NPE in ReduceSinkDeDuplication
                 Key: HIVE-4186
                 URL: https://issues.apache.org/jira/browse/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:
{noformat}
java.lang.NullPointerException
	at org.apache.hadoop.hive.ql.optimizer.ReduceSinkDeDuplication$ReduceSinkDeduplicateProcFactory$ReducerReducerProc.getPartitionAndKeyColumnMapping(ReduceSinkDeDuplication.java:416)
{noformat}

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

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

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