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From "Jeff Zhang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1221) Filter equality does not work for tuples
Date Fri, 18 Jun 2010 01:39:24 GMT

    [ https://issues.apache.org/jira/browse/PIG-1221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12880035#action_12880035
] 

Jeff Zhang commented on PIG-1221:
---------------------------------

I checked the test log, the errors from contrib tests do not related with this patch.


> Filter equality does not work for tuples
> ----------------------------------------
>
>                 Key: PIG-1221
>                 URL: https://issues.apache.org/jira/browse/PIG-1221
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.8.0
>         Environment: Windows and Linux. Java 1.6 hadoop 0.20.1
>            Reporter: Neil Blue
>            Assignee: Jeff Zhang
>             Fix For: 0.8.0
>
>         Attachments: PIG_1221.patch
>
>
> From the documentation I understand that it should be possible to  filter a relation
based on the equality of tuples. http://wiki.apache.org/pig/PigTypesFunctionalSpec , http://hadoop.apache.org/pig/docs/r0.5.0/piglatin_reference.html#deref:
>  However with this data file
> -- indext.txt:
> (1,one) (1,ONE)
> (2,two) (22, twentytwo)
> (3,three)       (3,three)
> I run this pig script:
> A = LOAD 'indext.txt' AS (t1:(a:int, b:chararray), t2:(a:int, b:chararray)); B = FILTER
A BY t1==t2; DUMP B;
> Expecting the output:
> ((3,three),(3,three))
> However there is an error:
> 2010-02-03 09:05:20,523 [main] ERROR org.apache.pig.tools.grunt.Grunt 
> - ERROR 2067: EqualToExpr does not know how to handle type: tuple
> > Pig Stack Trace
> > ---------------
> > ERROR 2067: EqualToExpr does not know how to handle type: tuple
> > org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066:  
> > Unable to
> > open iterator for alias B
> >        at org.apache.pig.PigServer.openIterator(PigServer.java:475)
> >        at
> > org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java: 
> > 532)
> >        at
> > org
> > .apache
> > .pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.
> > java:190)
> >        at
> > org
> > .apache
> > .pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:166
> > )
> >        at
> > org
> > .apache
> > .pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:142
> > )
> >        at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:89)
> >        at org.apache.pig.Main.main(Main.java:397)
> > Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR
> > 1002:
> > Unable to store alias B
> >        at org.apache.pig.PigServer.store(PigServer.java:530)
> >        at org.apache.pig.PigServer.openIterator(PigServer.java:458)
> >        ... 6 more
> > Caused by: org.apache.pig.backend.executionengine.ExecException:  
> > ERROR 2067:
> > EqualToExpr does not know how to handle type: tuple
> >        at
> > org
> > .apache
> > .pig.backend.hadoop.executionengine.physicalLayer.expressionOperat
> > ors.EqualToExpr.getNext(EqualToExpr.java:108)
> >        at
> > org
> > .apache
> > .pig.backend.hadoop.executionengine.physicalLayer.relationalOperat
> > ors.POFilter.getNext(POFilter.java:148)
> >        at
> > org
> > .apache
> > .pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
> > .processInput(PhysicalOperator.java:231)
> >        at
> > org
> > .apache
> > .pig.backend.local.executionengine.physicalLayer.counters.POCounte
> > r.getNext(POCounter.java:71)
> >        at
> > org
> > .apache
> > .pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
> > .processInput(PhysicalOperator.java:231)
> >        at
> > org
> > .apache
> > .pig.backend.hadoop.executionengine.physicalLayer.relationalOperat
> > ors.POStore.getNext(POStore.java:117)
> >        at
> > org
> > .apache
> > .pig.backend.local.executionengine.LocalPigLauncher.runPipeline(Lo
> > calPigLauncher.java:146)
> >        at
> > org
> > .apache
> > .pig.backend.local.executionengine.LocalPigLauncher.launchPig(Loca
> > lPigLauncher.java:109)
> >        at
> > org
> > .apache
> > .pig.backend.local.executionengine.LocalExecutionEngine.execute(Lo
> > calExecutionEngine.java:165)
> Thanks
> Neil

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