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https://issues.apache.org/jira/browse/PIG-828?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Alan Gates reassigned PIG-828:
------------------------------
Assignee: (was: Alan Gates)
> Problem accessing a tuple within a bag
> --------------------------------------
>
> Key: PIG-828
> URL: https://issues.apache.org/jira/browse/PIG-828
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.3.0
> Reporter: Viraj Bhat
> Fix For: 0.9.0
>
> Attachments: studenttab5, tupleacc.pig
>
>
> Below pig script creates a tuple which contains 3 columns, 2 of which are
> chararray's and the third column is a bag of constant chararray. The script
> later projects the tuple within a bag.
> {code}
> a = load 'studenttab5' as (name, age, gpa);
> b = foreach a generate ('viraj', {('sms')}, 'pig') as
> document:(id,singlebag:{singleTuple:(single)}, article);
> describe b;
> c = foreach b generate document.singlebag;
> dump c;
> {code}
> When we run this script we get a run-time error in the Map phase.
> ============================================================================================
> java.lang.ClassCastException: org.apache.pig.data.DefaultTuple cannot be cast
> to org.apache.pig.data.DataBag
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.processInputBag(POProject.java:402)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.getNext(POProject.java:183)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.processInputBag(POProject.java:400)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.getNext(POProject.java:183)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:250)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:204)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:245)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:236)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapOnly$Map.map(PigMapOnly.java:65)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:47)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:227)
> at
> org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2209)
> ============================================================================================
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