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https://issues.apache.org/jira/browse/PIG-5067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15678008#comment-15678008
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Daniel Dai commented on PIG-5067:
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It produce theoretically right result, but I agree that's misleading. How about
throw a frontend exception if mixing incompatible types?
> Revisit union on numeric type and chararray to bytearray
> --------------------------------------------------------
>
> Key: PIG-5067
> URL: https://issues.apache.org/jira/browse/PIG-5067
> Project: Pig
> Issue Type: Bug
> Reporter: Koji Noguchi
>
> In PIG-2071, we changed the behavior of union on numeric and chararray to
> bytearray.
> This itself was always failing at runtime until we changed to skip the
> bytearray typecast for union-onschema in PIG-3270.
> (For union, it still fails with typecast to bytearray error. )
> Now, seeing users getting inconsistent results due to this union-ed bytearray.
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