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Posted to dev@pig.apache.org by "Richard Ding (JIRA)" <ji...@apache.org> on 2010/06/04 20:36:54 UTC
[jira] Created: (PIG-1439) [Performance] Create a single combiner
class to add MultiQuery optimization
[Performance] Create a single combiner class to add MultiQuery optimization
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Key: PIG-1439
URL: https://issues.apache.org/jira/browse/PIG-1439
Project: Pig
Issue Type: Improvement
Reporter: Richard Ding
Right now Pig uses two combiner classes (PigCombiner & DistinctCombiner) respectively for group by and distinct operations. This prevents the MultiQueryOptimizer to merge jobs with different types of combiners. The proposal here is to merge these two combiners into a single Pig combiner so that the optimizer can merge group by jobs with distinct jobs.
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[jira] Updated: (PIG-1439) [Performance] Create a single combiner
class to aid MultiQuery optimization
Posted by "Richard Ding (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-1439?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Richard Ding updated PIG-1439:
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Summary: [Performance] Create a single combiner class to aid MultiQuery optimization (was: [Performance] Create a single combiner class to add MultiQuery optimization )
> [Performance] Create a single combiner class to aid MultiQuery optimization
> ----------------------------------------------------------------------------
>
> Key: PIG-1439
> URL: https://issues.apache.org/jira/browse/PIG-1439
> Project: Pig
> Issue Type: Improvement
> Reporter: Richard Ding
>
> Right now Pig uses two combiner classes (PigCombiner & DistinctCombiner) respectively for group by and distinct operations. This prevents the MultiQueryOptimizer to merge jobs with different types of combiners. The proposal here is to merge these two combiners into a single Pig combiner so that the optimizer can merge group by jobs with distinct jobs.
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