MapJoin optimizer can make the wrong decision on compressed tables
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Key: HIVE-2316
URL: https://issues.apache.org/jira/browse/HIVE-2316
Project: Hive
Issue Type: Bug
Reporter: Patrick Angeles
With hive.auto.convert.join = true, it appears that when the small tables are
compressed, the optimizer cannot properly guess the size of the in-memory
tables. It proceeds with a MapJoin based on the compressed size, instead of
falling back to a CommonJoin.
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