Map side optimization for Limit (top k case) --------------------------------------------
Key: PIG-365
URL: https://issues.apache.org/jira/browse/PIG-365
Project: Pig
Issue Type: Improvement
Components: impl
Affects Versions: types_branch
Reporter: Daniel Dai
Assignee: Daniel Dai
Fix For: types_branch
In map side, only collect top k records to improve performance
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