Prasanth Jayachandran created HIVE-18359:
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Summary: Extend grouping set limits from int to long
Key: HIVE-18359
URL: https://issues.apache.org/jira/browse/HIVE-18359
Project: Hive
Issue Type: Bug
Affects Versions: 3.0.0
Reporter: Prasanth Jayachandran
Assignee: Prasanth Jayachandran
Grouping sets is broken for >32 columns because of usage of Int for bitmap
(also GROUPING__ID virtual column). This assumption breaks grouping
sets/rollups/cube when number of participating aggregation columns is >32. The
easier fix would be extend it to Long for now. The correct fix would be to use
BitSets everywhere but that would require GROUPING__ID column type to binary
which will make predicates on GROUPING__ID difficult to deal with.
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