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https://issues.apache.org/jira/browse/PIG-953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12753833#action_12753833
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Dmitriy V. Ryaboy commented on PIG-953:
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I got my trues and falses reversed on the NPE thing. You are right, the
function works as intended.
I still think it's too verbose, but agree that it's a style issue -- I guess if
the commiters like it, it's fine :-)
> Enable merge join in pig to work with loaders and store functions which can
> internally index sorted data
> ---------------------------------------------------------------------------------------------------------
>
> Key: PIG-953
> URL: https://issues.apache.org/jira/browse/PIG-953
> Project: Pig
> Issue Type: Improvement
> Affects Versions: 0.3.0
> Reporter: Pradeep Kamath
> Assignee: Pradeep Kamath
> Attachments: PIG-953.patch
>
>
> Currently merge join implementation in pig includes construction of an index
> on sorted data and use of that index to seek into the "right input" to
> efficiently perform the join operation. Some loaders (notably the zebra
> loader) internally implement an index on sorted data and can perform this
> seek efficiently using their index. So the use of the index needs to be
> abstracted in such a way that when the loader supports indexing, pig uses it
> (indirectly through the loader) and does not construct an index.
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