Navis created HIVE-3550:
---------------------------
Summary: Early skipping for limit operator at reduce stage
Key: HIVE-3550
URL: https://issues.apache.org/jira/browse/HIVE-3550
Project: Hive
Issue Type: Improvement
Components: Query Processor
Reporter: Navis
Assignee: Navis
Priority: Trivial
Queries with limit clause whose final result is from reduce stage could not be
early exited like map stage. But it seemed possible to just skip remaining
lines. It can be accomplished by adding just two lines. Is there any reason we
should not to do that?
{noformat}
select key from src order by key limit 10;
1. current
ExtractOperator: 3 forwarded 500 rows
LimitOperator: 4 forwarded 10 rows
2. early skipping
ExtractOperator: 3 forwarded 12 rows
LimitOperator: 4 forwarded 10 rows
{noformat}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
