Gang Tim Liu created HIVE-3642:
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Summary: Hive List Bucketing - optimize transform()
Key: HIVE-3642
URL: https://issues.apache.org/jira/browse/HIVE-3642
Project: Hive
Issue Type: New Feature
Reporter: Gang Tim Liu
Priority: Minor
In list bucketing transform(), we create pruning tree for each partition.
Although it is possible that different partitions have different skewed keys,
chances are that there will be a lot of overlap.
It would be a good idea to optimize that case.
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