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https://issues.apache.org/jira/browse/PIG-1627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910757#action_12910757
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Alan Gates commented on PIG-1627:
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The problem is in the flatten, not the group. The group has the proper schema
(bytearray, bag{}). Loading a bag of unknown schema and flattening it produces
the same result.
Flattening a tuple of unknown content has the same problem as well.
> Flattening of bags with unknown schemas produces wrong schema
> -------------------------------------------------------------
>
> Key: PIG-1627
> URL: https://issues.apache.org/jira/browse/PIG-1627
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.7.0
> Reporter: Alan Gates
> Assignee: Alan Gates
> Fix For: 0.9.0
>
>
> The following should produce an unknown schema:
> {code}
> A = load '/Users/gates/test/data/studenttab10';
> B = group A by $0;
> C = foreach B generate flatten(A);
> describe C;
> {code}
> Instead it gives
> {code}
> C: {bytearray}
> {code}
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