[ https://issues.apache.org/jira/browse/PIG-828?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Olga Natkovich reassigned PIG-828: ---------------------------------- Assignee: Daniel Dai Daniel, are the semantic changes you are making handling this case? > 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 > Assignee: Daniel Dai > 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) > ============================================================================================ -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.