Pig does not support storing nested data using default storage
--------------------------------------------------------------

                 Key: PIG-527
                 URL: https://issues.apache.org/jira/browse/PIG-527
             Project: Pig
          Issue Type: Bug
    Affects Versions: types_branch
            Reporter: Santhosh Srinivasan
            Assignee: Santhosh Srinivasan
             Fix For: types_branch


Pig does not allow storing nested data using the default storage function 
(PigStorage)

{code}

grunt> a = load 'student_tab.data' as (name, age, gpa);
grunt> b = group a by age;
grunt> store b into '/user/sms/data/complex.data';

2008-11-13 16:21:17,711 [main] INFO  
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher 
- 50% complete

2008-11-13 16:21:52,747 [main] ERROR 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher 
- Map reduce job failed

2008-11-13 16:21:52,747 [main] ERROR 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher 
- Job failed!

2008-11-13 16:21:52,764 [main] ERROR 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher - Error 
message from task (reduce) task_200809241441_21188_r_000000java.io.IOException: 
Cannot store a non-flat tuple using PigStorage

        at org.apache.pig.builtin.PigStorage.putNext(PigStorage.java:196)
        at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat$PigRecordWriter.write(PigOutputFormat.java:116)
        at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat$PigRecordWriter.write(PigOutputFormat.java:90)
        at org.apache.hadoop.mapred.ReduceTask$3.collect(ReduceTask.java:300)
        at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.processOnePackageOutput(PigMapReduce.java:238)
        at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.reduce(PigMapReduce.java:224)
        at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.reduce(PigMapReduce.java:136)
        at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:318)
        at 
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2207)

2008-11-13 16:21:52,764 [main] ERROR 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher - Error 
message from task (reduce) task_200809241441_21188_r_000000java.io.IOException: 
Cannot store a non-flat tuple using PigStorage

{code}

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