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From "caofangkun (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-3945) union all datatype do not match may result wrong result
Date Fri, 25 Jan 2013 09:31:15 GMT
caofangkun created HIVE-3945:
--------------------------------

             Summary: union all datatype do not match may result wrong result 
                 Key: HIVE-3945
                 URL: https://issues.apache.org/jira/browse/HIVE-3945
             Project: Hive
          Issue Type: Bug
          Components: Query Processor
    Affects Versions: 0.9.0
            Reporter: caofangkun
            Priority: Minor


hive (default)> desc src;
key	string	
value	string	

select key, value FROM 
( select 'key' as key, 'value' as value         -- datatype: string, string
  from src s1 limit 1
  UNION  ALL  
  select s2.key as key, sum(s2.value) as value  -- datatype: strung, double 
  from src s2 group by s2.key
 ) unionsrc;
this query exec normally but has wrong result:
key	2.4081029415476845E-282    -- expected is 'value'
	35.0
100	100.0
48	0.0

and sometimes when the string title is too long it may case ArrayIndexOutOfBoundsException:

Caused by: java.lang.ArrayIndexOutOfBoundsException
at java.lang.System.arraycopy(Native Method)
at org.apache.hadoop.io.Text.set(Text.java:205)
at org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryString.init(LazyBinaryString.java:48)
at org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryStruct.uncheckedGetField(LazyBinaryStruct.java:216)
at org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryStruct.getField(LazyBinaryStruct.java:197)
at org.apache.hadoop.hive.serde2.lazybinary.objectinspector.LazyBinaryStructObjectInspector.getStructFieldData(LazyBinaryStructObjectInspector.java:61)
at org.apache.hadoop.hive.ql.exec.UnionOperator.processOp(UnionOperator.java:125)
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.MapOperator.process(MapOperator.java:531)




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