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https://issues.apache.org/jira/browse/HIVE-2209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13049297#comment-13049297
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Krishna Kumar commented on HIVE-2209:
-------------------------------------
He Yongqiang,
Can you take a look at this one? Once this is in, I can upload the remainder
of the patch to HIVE-956.
Thanks.
> Provide a way by which ObjectInspectorUtils.compare can be extended by the
> caller for comparing maps which are part of the object
> ---------------------------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-2209
> URL: https://issues.apache.org/jira/browse/HIVE-2209
> Project: Hive
> Issue Type: Improvement
> Reporter: Krishna Kumar
> Assignee: Krishna Kumar
> Priority: Minor
> Attachments: HIVE-2209v0.patch
>
>
> Now ObjectInspectorUtils.compare throws an exception if a map is contained
> (recursively) within the objects being compared. Two obvious implementations
> are
> - a simple map comparer which assumes keys of the first map can be used to
> fetch values from the second
> - a 'cross-product' comparer which compares every pair of key-value pairs in
> the two maps, and calls a match if and only if all pairs are matched
> Note that it would be difficult to provide a transitive
> greater-than/less-than indication with maps so that is not in scope.
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