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https://issues.apache.org/jira/browse/PIG-4490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14481049#comment-14481049
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xplenty commented on PIG-4490:
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I attached a new patch with unit tests but I can't test that it works as I
can't compile the code right now.
> MIN/MAX builtin UDFs return wrong results when accumulating for strings
> -----------------------------------------------------------------------
>
> Key: PIG-4490
> URL: https://issues.apache.org/jira/browse/PIG-4490
> Project: Pig
> Issue Type: Bug
> Components: internal-udfs
> Affects Versions: 0.12.0, 0.13.0, 0.14.0
> Reporter: xplenty
> Attachments: fix-min-max-test.patch, fix-min-max.patch
>
>
> When using MIN/MAX UDFs with strings in a job that uses the accumulator
> interface the results are wrong - The UDF won't return the correct MIN/MAX
> value.
> this is caused by a reverse 'GreaterThan/SmallerThan" (<>) sign in the
> accumulate() function of both StringMin/StringMax UDFs.
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