Rohini Palaniswamy created PIG-4587:
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Summary: Only apply isFirstReduceOfKey for Skewed right outer join
Key: PIG-4587
URL: https://issues.apache.org/jira/browse/PIG-4587
Project: Pig
Issue Type: Bug
Reporter: Rohini Palaniswamy
Assignee: Daniel Dai
Fix For: 0.16.0
PIG-4377 introduced isFirstReduceOfKey to avoid extra records in case of over
sampling. But the issue can occur only in the case of right outer join. But it
is added to the plan in MRCompiler and TezCompiler (PIG-4580) for both left and
right outer joins. We need to remove that extra check for right outer join. It
is unnecessary performance penalty.
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