[jira] Created: (HIVE-512) [GenericUDF] new string function ELT(N,str1,str2,str3,...)

[Min Zhou (JIRA)]

[GenericUDF] new string function ELT(N,str1,str2,str3,...) 
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                 Key: HIVE-512
                 URL: https://issues.apache.org/jira/browse/HIVE-512
             Project: Hadoop Hive
          Issue Type: New Feature
          Components: Query Processor
    Affects Versions: 0.4.0
            Reporter: Min Zhou
            Assignee: Min Zhou
             Fix For: 0.4.0


ELT(N,str1,str2,str3,...)

Returns str1 if N = 1, str2 if N = 2, and so on. Returns NULL if N is less than 
1 or greater than the number of arguments. ELT() is the complement of FIELD().

{noformat}
mysql> SELECT ELT(1, 'ej', 'Heja', 'hej', 'foo');
        -> 'ej'
mysql> SELECT ELT(4, 'ej', 'Heja', 'hej', 'foo');
        -> 'foo'
{noformat}




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