Deepak Jaiswal created HIVE-16132:
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Summary: DataSize stats don't seem correct in semijoin opt branch
Key: HIVE-16132
URL: https://issues.apache.org/jira/browse/HIVE-16132
Project: Hive
Issue Type: Bug
Components: HiveServer2
Reporter: Deepak Jaiswal
Assignee: Deepak Jaiswal
For the following operator tree snippet, the second Select is the start of a
semijoin optimization branch. Take a look at the Data size - it is the same as
the data size for its parent Select, even though the second select has only a
single bigint column in its projection (the parent has 2 columns). I would
expect the size to be 533328 (16 bytes * 33333).
Fixing this estimate may become important if we need to estimate the cost of
generating the min/max/bloomfilter.
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