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https://issues.apache.org/jira/browse/PIG-4773?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15091493#comment-15091493
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Daniel Dai commented on PIG-4773:
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I see. Once we have two inputs for secondary sort, this will be tricky, since
sorting should be an edge property.
+1 for now.
> [Pig on Tez] Secondary key descending sort in nested foreach after union does
> ascending instead
> -----------------------------------------------------------------------------------------------
>
> Key: PIG-4773
> URL: https://issues.apache.org/jira/browse/PIG-4773
> Project: Pig
> Issue Type: Bug
> Components: tez
> Reporter: Rohini Palaniswamy
> Assignee: Rohini Palaniswamy
> Fix For: 0.16.0
>
> Attachments: PIG-4773-1.patch, PIG-4773-2.patch
>
>
> PigSecondaryKeyComparator does not implement a compare(WritableComparable
> a, WritableComparable b) method. In case of OrderedGroupedMergedKVInput with
> vertex groups, object comparison instead of byte comparison is done when
> merging the multiple inputs into one. Since the compare API is not
> overridden, WritableComparator compare API is called and the value types are
> directly compared which means it is always ascending.
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