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https://issues.apache.org/jira/browse/HIVE-9141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14251267#comment-14251267
]
Pengcheng Xiong commented on HIVE-9141:
---------------------------------------
Thanks [~navis]. I also tested the patch with other test cases and it works so
far so good.
> 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
> Assignee: Navis
> Attachments: HIVE-9141.1.patch.txt
>
>
> 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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