Charles Pritchard created HIVE-5900:
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Summary: Bucketing and dynamic partitions should allow additional
reducers
Key: HIVE-5900
URL: https://issues.apache.org/jira/browse/HIVE-5900
Project: Hive
Issue Type: Bug
Reporter: Charles Pritchard
When a target table is clustered into buckets, hive.enforce.bucketing will
limit the number of reducers to match the number of buckets. It should take
into account the number of partitions * number of buckets.
SET hive.exec.dynamic.partition.mode=nonstrict;
SET hive.enforce.bucketing = true;
SET hive.enforce.sorting = true;
INSERT INTO TABLE dest PARTITION(part) SELECT * FROM origin;
In this case, when dest has 5 buckets, the number of reducers will be 5 -- if
there are 10 partitions, the maximum reducers should be 50, not 5.
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