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From "Pengcheng Xiong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-9141) HiveOnTez: mix of union all, distinct, group by generates error
Date Wed, 17 Dec 2014 07:23:13 GMT
Pengcheng Xiong created HIVE-9141:
-------------------------------------

             Summary: HiveOnTez: mix of union all, distinct, group by generates error
                 Key: HIVE-9141
                 URL: https://issues.apache.org/jira/browse/HIVE-9141
             Project: Hive
          Issue Type: Bug
            Reporter: Pengcheng Xiong


Here is the way to produce it:
in Hive q test setting (with src table)
set hive.execution.engine=tez;

SELECT key, value FROM
  (
  	SELECT key, value FROM src

    UNION ALL

  	SELECT key, key as value FROM 
  	
  		(  
  		    SELECT distinct key FROM (

      		SELECT key, value FROM
      		(SELECT key, value FROM src
        		UNION ALL
      		SELECT key, value FROM src
      		)t1 
      		group by  key, value
      		)t2
        )t3 
      
   )t4
   group by  key, value;

will generate

2014-12-16 23:19:13,593 ERROR ql.Driver (SessionState.java:printError(834)) - FAILED: ClassCastException
org.apache.hadoop.hive.ql.plan.MapWork cannot be cast to org.apache.hadoop.hive.ql.plan.ReduceWork
java.lang.ClassCastException: org.apache.hadoop.hive.ql.plan.MapWork cannot be cast to org.apache.hadoop.hive.ql.plan.ReduceWork
        at org.apache.hadoop.hive.ql.parse.GenTezWork.process(GenTezWork.java:361)
        at org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:90)
        at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatchAndReturn(DefaultGraphWalker.java:94)
        at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.walk(GenTezWorkWalker.java:87)
        at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.walk(GenTezWorkWalker.java:103)
        at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.walk(GenTezWorkWalker.java:103)
        at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.walk(GenTezWorkWalker.java:103)
        at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.walk(GenTezWorkWalker.java:103)
        at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.startWalking(GenTezWorkWalker.java:69)
        at org.apache.hadoop.hive.ql.parse.TezCompiler.generateTaskTree(TezCompiler.java:368)
        at org.apache.hadoop.hive.ql.parse.TaskCompiler.compile(TaskCompiler.java:202)
        at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:10202)
        at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:224)
        at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:419)
        at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:305)
        at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1107)
        at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1155)
        at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1044)
        at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1034)
        at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:206)
        at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:158)
        at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:369)
        at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:304)
        at org.apache.hadoop.hive.ql.QTestUtil.executeClient(QTestUtil.java:834)
        at org.apache.hadoop.hive.cli.TestMiniTezCliDriver.runTest(TestMiniTezCliDriver.java:136)
        at org.apache.hadoop.hive.cli.TestMiniTezCliDriver.testCliDriver_uniontez2(TestMiniTezCliDriver.java:120)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)



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