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From "Neil Blue (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-1221) Filter equality does not work for tuples
Date Thu, 04 Feb 2010 09:22:27 GMT
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: 0.5.0
         Environment: Windows and Linux. Java 1.6 hadoop 0.20.1
            Reporter: Neil Blue


>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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