remove special processing for map-join
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Key: HIVE-2669
URL: https://issues.apache.org/jira/browse/HIVE-2669
Project: Hive
Issue Type: Improvement
Reporter: Namit Jain
With hive.auto.convert.join, there is no need for the user to specify map-join
hint.
It should be completely ignored, other than for bucketized join which can be
cleaned later.
There is a lot of code in the optimizer for processing union followed by
map-join etc. which should
be gotten rid of.
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