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From "Santhosh Srinivasan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-518) LOBinCond exception in LogicalPlanValidationExecutor when providing default values for bag
Date Wed, 05 Nov 2008 03:11:44 GMT

    [ https://issues.apache.org/jira/browse/PIG-518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12645141#action_12645141
] 

Santhosh Srinivasan commented on PIG-518:
-----------------------------------------

This issue looks like a duplicate of PIG-449.

> LOBinCond  exception in LogicalPlanValidationExecutor when providing default values for
bag
> -------------------------------------------------------------------------------------------
>
>                 Key: PIG-518
>                 URL: https://issues.apache.org/jira/browse/PIG-518
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: types_branch
>            Reporter: Viraj Bhat
>             Fix For: types_branch
>
>         Attachments: queries.txt, sports_views.txt
>
>
> The following piece of Pig script, which provides default values for bags {('','')} 
when the COUNT returns 0 fails with the following error. (Note: Files used in this script
are enclosed on this Jira.)
> ================================================================================================
> a = load 'sports_views.txt' as (col1, col2, col3);
> b = load 'queries.txt' as (colb1,colb2,colb3);
> mycogroup = cogroup a by col1 inner, b by colb1;
> mynewalias = foreach mycogroup generate flatten(a), flatten((COUNT(b) > 0L ? b.(colb2,colb3)
: {('','')}));
> dump mynewalias;
> ================================================================================================
> java.io.IOException: Unable to open iterator for alias: mynewalias [Unable to store for
alias: mynewalias [Can't overwrite cause]]
>      at java.lang.Throwable.initCause(Throwable.java:320)
>      at org.apache.pig.impl.logicalLayer.validators.TypeCheckingVisitor.visit(TypeCheckingVisitor.java:1494)
>      at org.apache.pig.impl.logicalLayer.LOBinCond.visit(LOBinCond.java:85)
>      at org.apache.pig.impl.logicalLayer.LOBinCond.visit(LOBinCond.java:28)
>      at org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:68)
>      at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51)
>      at org.apache.pig.impl.logicalLayer.validators.TypeCheckingVisitor.checkInnerPlan(TypeCheckingVisitor.java:2345)
>      at org.apache.pig.impl.logicalLayer.validators.TypeCheckingVisitor.visit(TypeCheckingVisitor.java:2252)
>      at org.apache.pig.impl.logicalLayer.LOForEach.visit(LOForEach.java:121)
>      at org.apache.pig.impl.logicalLayer.LOForEach.visit(LOForEach.java:40)
>      at org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:68)
>      at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51)
>      at org.apache.pig.impl.plan.PlanValidator.validateSkipCollectException(PlanValidator.java:101)
>      at org.apache.pig.impl.logicalLayer.validators.TypeCheckingValidator.validate(TypeCheckingValidator.java:40)
>      at org.apache.pig.impl.logicalLayer.validators.TypeCheckingValidator.validate(TypeCheckingValidator.java:30)
>      at org.apache.pig.impl.logicalLayer.validators.LogicalPlanValidationExecutor.validate(LogicalPlanValidationExecutor.java:
> 79)
>      at org.apache.pig.PigServer.compileLp(PigServer.java:684)
>      at org.apache.pig.PigServer.compileLp(PigServer.java:655)
>      at org.apache.pig.PigServer.store(PigServer.java:433)
>      at org.apache.pig.PigServer.store(PigServer.java:421)
>      at org.apache.pig.PigServer.openIterator(PigServer.java:384)
>      at org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:269)
>      at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:178)
>      at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:84)
>      at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
>      at org.apache.pig.Main.main(Main.java:306)
> Caused by: java.io.IOException: Unable to store for alias: mynewalias [Can't overwrite
cause]
>      ... 26 more
> Caused by: java.lang.IllegalStateException: Can't overwrite cause
>      ... 26 more
> ================================================================================================

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