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https://issues.apache.org/jira/browse/PIG-1112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Olga Natkovich updated PIG-1112:
--------------------------------

    Fix Version/s:     (was: 0.6.0)

Moving out of 0.6.0 release. The right way to run this query is to specify the 
complete schema for the bag. We are not sure how we should be dealing with 
partial schemas and need to figure out the overall strategy before fixing 
individual issues.

> FLATTEN eliminates the alias
> ----------------------------
>
>                 Key: PIG-1112
>                 URL: https://issues.apache.org/jira/browse/PIG-1112
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Ankur
>            Assignee: Daniel Dai
>
> If schema for a field of type 'bag' is partially defined then FLATTEN() 
> incorrectly eliminates the field and throws an error. 
> Consider the following example:-
> A = LOAD 'sample' using PigStorage() as (first:chararray, second:chararray, 
> ladder:bag{});              
> B = FOREACH A GENERATE first,FLATTEN(ladder) as third,second;                 
>                   
> C = GROUP B by (first,third);
> This throws the error
>  ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1000: Error during parsing. 
> Invalid alias: third in {first: chararray,second: chararray}

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