Xuefu Zhang created HIVE-7328:
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Summary: Refactoring: make Hive reduce side data processing
reusable
Key: HIVE-7328
URL: https://issues.apache.org/jira/browse/HIVE-7328
Project: Hive
Issue Type: Sub-task
Affects Versions: 0.13.0
Reporter: Xuefu Zhang
Assignee: Xuefu Zhang
ExecReducer is Hive's reducer implementation for MapReduce. Table rows are
shuffled by MR framework to ExecReducer and further processed by
ExecReducer.reduce() method, which invokes Hive's reduce-side operator tree
starting. This task is to extract the reduce-side data processing offered by
the operator tree so that it can be reused by other execution engine such as
Spark. This is purely refactoring the existing code.
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