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Posted to dev@pig.apache.org by "Thejas M Nair (JIRA)" <ji...@apache.org> on 2011/04/29 17:22:03 UTC
[jira] [Commented] (PIG-2018) NPE for co-group with group-by column
having complex schema and different load functions for each input
[ https://issues.apache.org/jira/browse/PIG-2018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13027021#comment-13027021 ]
Thejas M Nair commented on PIG-2018:
------------------------------------
unit tests and test-patch passed for PIG-2018.1.patch .
> NPE for co-group with group-by column having complex schema and different load functions for each input
> -------------------------------------------------------------------------------------------------------
>
> Key: PIG-2018
> URL: https://issues.apache.org/jira/browse/PIG-2018
> Project: Pig
> Issue Type: Bug
> Reporter: Thejas M Nair
> Assignee: Thejas M Nair
> Fix For: 0.9.0
>
> Attachments: PIG-2018.1.patch
>
>
> {code}
> l1 = load 'x' using PigStorage(':') as (a : (i : int),b,c);
> l2 = load 'x' as (a,b,c);
> cg = cogroup l1 by a, l2 by a;
> explain cg;
> Gives -
> ERROR 1067: Unable to explain alias cg
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1067: Unable to explain alias cg
> at org.apache.pig.PigServer.explain(PigServer.java:1075)
> at org.apache.pig.tools.grunt.GruntParser.explainCurrentBatch(GruntParser.java:381)
> at org.apache.pig.tools.grunt.GruntParser.processExplain(GruntParser.java:313)
> at org.apache.pig.tools.grunt.GruntParser.processExplain(GruntParser.java:276)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.Explain(PigScriptParser.java:665)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:325)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:176)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:152)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:90)
> at org.apache.pig.Main.run(Main.java:554)
> at org.apache.pig.Main.main(Main.java:109)
> Caused by: java.lang.NullPointerException
> at org.apache.pig.newplan.logical.visitor.LineageFindRelVisitor.mapMatchLoadFuncToUid(LineageFindRelVisitor.java:528)
> at org.apache.pig.newplan.logical.visitor.LineageFindRelVisitor.visit(LineageFindRelVisitor.java:287)
> at org.apache.pig.newplan.logical.relational.LOCogroup.accept(LOCogroup.java:235)
> at org.apache.pig.newplan.DependencyOrderWalker.walk(DependencyOrderWalker.java:75)
> at org.apache.pig.newplan.PlanVisitor.visit(PlanVisitor.java:50)
> at org.apache.pig.newplan.logical.visitor.CastLineageSetter.<init>(CastLineageSetter.java:57)
> at org.apache.pig.PigServer$Graph.compile(PigServer.java:1683)
> at org.apache.pig.PigServer$Graph.compile(PigServer.java:1659)
> at org.apache.pig.PigServer$Graph.access$200(PigServer.java:1389)
> at org.apache.pig.PigServer.buildStorePlan(PigServer.java:1277)
> at org.apache.pig.PigServer.explain(PigServer.java:1038)
> ... 10 more
> {code}
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