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https://issues.apache.org/jira/browse/PIG-1438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Richard Ding updated PIG-1438:
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Status: Patch Available (was: Open)
> [Performance] MultiQueryOptimizer should also merge DISTINCT jobs
> -----------------------------------------------------------------
>
> Key: PIG-1438
> URL: https://issues.apache.org/jira/browse/PIG-1438
> Project: Pig
> Issue Type: Improvement
> Components: impl
> Affects Versions: 0.7.0
> Reporter: Richard Ding
> Assignee: Richard Ding
> Fix For: 0.8.0
>
> Attachments: PIG-1438.patch, PIG-1438_1.patch
>
>
> Current implementation doesn't merge jobs derived from DISTINCT statements.
> The reason is that DISTINCT jobs are implemented using a special combiner
> (DistinctCombiner). But we should be able to merge jobs that have the same
> type of combiner (e.g. merge multiple DISTINCT jobs into one).
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