Navis created HIVE-5381:
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Summary: OOM when using many lead/lag funtions against large
partition
Key: HIVE-5381
URL: https://issues.apache.org/jira/browse/HIVE-5381
Project: Hive
Issue Type: Improvement
Components: Query Processor
Reporter: Navis
Assignee: Navis
Priority: Minor
Currently, columns containing window function are evaluated for all rows in a
partition, which possibly make OOM if the partition is big (400MB in my case).
For lead/lag functions, the value can be evaluated per row.
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