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https://issues.apache.org/jira/browse/PIG-5067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15678037#comment-15678037
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Koji Noguchi commented on PIG-5067:
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bq. How about throw a frontend exception if mixing incompatible types?
+1. With just 'union', it already fail at compile time since I only took out
the typecast for union-onschema and not union in PIG-3270.
> 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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