no way to know number of rows for a reducer and join keys
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Key: HIVE-440
URL: https://issues.apache.org/jira/browse/HIVE-440
Project: Hadoop Hive
Issue Type: Wish
Components: Query Processor
Reporter: Namit Jain
Assignee: Namit Jain
It is a good debugging tool to dump number of rows for a reducer, and to emit
the number of entries for a join key for a internal table
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