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https://issues.apache.org/jira/browse/PIG-2051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13038322#comment-13038322
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Daniel Dai commented on PIG-2051:
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+1. Will commit if tests pass.
> new LogicalSchema column prune code does not preserve type information for
> map subfields
> ----------------------------------------------------------------------------------------
>
> Key: PIG-2051
> URL: https://issues.apache.org/jira/browse/PIG-2051
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.10
> Reporter: Woody Anderson
> Assignee: Woody Anderson
> Fix For: 0.10
>
> Attachments: 2051.patch
>
>
> current impl of ColumnPruneVisitor.visit ignores field type info and passes
> type BYTEARRAY for all map fields.
> the corrected type is pretty easy to fill in, especially since map field info
> is only attempted 1 level deep.
> i came across this b/c i utilize the type information in the pushProjection
> call, and this was previously of the 'correct' type information, the change
> over to LogicalSchema caused a regression.
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