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From "Yong Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-4237) Hive cannot support following query, and will throw java.lang.IndexOutOfBoundsException in org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector
Date Wed, 27 Mar 2013 13:55:16 GMT
Yong Zhang created HIVE-4237:
--------------------------------

             Summary: Hive cannot support following query, and will throw java.lang.IndexOutOfBoundsException
in org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector
                 Key: HIVE-4237
                 URL: https://issues.apache.org/jira/browse/HIVE-4237
             Project: Hive
          Issue Type: Bug
          Components: Query Processor, Serializers/Deserializers
    Affects Versions: 0.9.0
         Environment: Hive 0.9.0 on JDK 1.6.0_35
            Reporter: Yong Zhang
            Priority: Minor


Recently, I was helping one of my colleague to fix one Hive issue. I have to admit that the
query didn't do what was planned, but I don't think it should break the hive.

For a hive table, the following query will break

select count(distinct columnA), columnB from table group by columnA, columnB

I know the correct query should be 
select count(distinct columnA), columnB from table group by columnB

But even in the incorrect query, hive should return me 1 as the unique count of columnA for
every columnB, but instead, it breaks with the following stack trace:

Caused by: java.lang.IndexOutOfBoundsException: Index: 2, Size: 2
        at java.util.ArrayList.RangeCheck(ArrayList.java:547)
        at java.util.ArrayList.get(ArrayList.java:322)
        at org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector.init(StandardStructObjectInspector.java:118)
        at org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector.<init>(StandardStructObjectInspector.java:106)
        at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory.getStandardStructObjectInspector(ObjectInspectorFactory.java:274)
        at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory.getStandardStructObjectInspector(ObjectInspectorFactory.java:259)
        at org.apache.hadoop.hive.ql.exec.ReduceSinkOperator.initEvaluatorsAndReturnStruct(ReduceSinkOperator.java:188)
        at org.apache.hadoop.hive.ql.exec.ReduceSinkOperator.processOp(ReduceSinkOperator.java:197)
        at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:471)
        at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:762)
        at org.apache.hadoop.hive.ql.exec.GroupByOperator.forward(GroupByOperator.java:959)
        at org.apache.hadoop.hive.ql.exec.GroupByOperator.closeOp(GroupByOperator.java:1005)


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