Do not assume if there is a local work, then there will be a map join operator
in this work
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Key: HIVE-1732
URL: https://issues.apache.org/jira/browse/HIVE-1732
Project: Hive
Issue Type: Improvement
Reporter: Liyin Tang
Assignee: Liyin Tang
Right now, we simply assume if there is a local work, then there will be a map
join operator.
This assumption is necessary true in the future.
Change the code of local work, either adding a type info or
creating sub class for each kind of local work, such as MapjoinLocalWork or
GroupbyLocalWork.
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