Amareshwari Sriramadasu created HIVE-3655:
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Summary: Use ChainMapper and ChainReducer for queries having
[Map+][RMap*] pattern
Key: HIVE-3655
URL: https://issues.apache.org/jira/browse/HIVE-3655
Project: Hive
Issue Type: Improvement
Components: Query Processor
Reporter: Amareshwari Sriramadasu
While breaking the query plan into multiple map reduce tasks, Hive should
consider the pattern [Map+][ReduceMap*] and generate single map reduce job for
such patterns using ChainMapper and ChainReducer
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