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https://issues.apache.org/jira/browse/PIG-2303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13114912#comment-13114912
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Daniel Dai commented on PIG-2303:
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It's not about MAX/MIN. "+" does not concat strings. You need to use CONCAT UDF.
> Documentation says the MAX function can be used on chararray, but it can't
> --------------------------------------------------------------------------
>
> Key: PIG-2303
> URL: https://issues.apache.org/jira/browse/PIG-2303
> Project: Pig
> Issue Type: Bug
> Components: documentation
> Reporter: Graham Lea
> Priority: Trivial
> Labels: documentation
>
> Here: http://pig.apache.org/docs/r0.9.0/func.html#max
> It says MIN/Max can be used on chararray, but the result of those functions
> is always a double.
> Had to search through the Pig Javadoc to find that I should use
> StringMin/StringMax instead.
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