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From "Kevin Wilfong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-2956) [hive] Provide error message when using UDAF in the place of UDF instead of throwing NPE
Date Wed, 09 May 2012 16:33:52 GMT

     [ https://issues.apache.org/jira/browse/HIVE-2956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kevin Wilfong updated HIVE-2956:
--------------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

Committed, thanks Navis.
                
> [hive] Provide error message when using UDAF in the place of UDF instead of throwing
NPE
> ----------------------------------------------------------------------------------------
>
>                 Key: HIVE-2956
>                 URL: https://issues.apache.org/jira/browse/HIVE-2956
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Navis
>            Assignee: Navis
>            Priority: Trivial
>         Attachments: HIVE-2956.D2823.1.patch, HIVE-2956.D2823.2.patch, HIVE-2956.D2823.3.patch
>
>
> For example, 
> {code}
> hive> select distinct deptno, sum(deptno) from emp;
> FAILED: Hive Internal Error: java.lang.NullPointerException(null)
> java.lang.NullPointerException
> 	at org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc.newInstance(ExprNodeGenericFuncDesc.java:214)
> 	at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory$DefaultExprProcessor.getXpathOrFuncExprNodeDesc(TypeCheckProcFactory.java:767)
> 	at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory$DefaultExprProcessor.process(TypeCheckProcFactory.java:888)
> 	at org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:89)
> 	at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatch(DefaultGraphWalker.java:88)
> 	at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.walk(DefaultGraphWalker.java:125)
> 	at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:102)
> 	at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory.genExprNode(TypeCheckProcFactory.java:165)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genExprNodeDesc(SemanticAnalyzer.java:7755)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genExprNodeDesc(SemanticAnalyzer.java:7713)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genGroupByPlanMapGroupByOperator(SemanticAnalyzer.java:2793)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genGroupByPlanMapAggr1MR(SemanticAnalyzer.java:3651)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genBodyPlan(SemanticAnalyzer.java:6125)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:6762)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:7531)
> 	at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:250)
> {code}
> Trivial.. but people always reports this confused by esoteric custom function names.

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