Add a option to run task to check map-join possibility in non-local mode
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Key: HIVE-1831
URL: https://issues.apache.org/jira/browse/HIVE-1831
Project: Hive
Issue Type: Improvement
Components: Query Processor
Reporter: Namit Jain
Assignee: Liyin Tang
In HIVE-1642, we run a local task to figure out if the small table can be held
in memory, and then convert the join into a map-join.
However, this can be a good idea for thin clients (which may not have enough
memory).
This should be made configurable - where the default can still be to run the
task locally on the client machine, but an option
should be added for thin clients, where the task would be run as a map-only task
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