Optimize number of mr jobs produced by group by sort by
-------------------------------------------------------
Key: HIVE-1506
URL: https://issues.apache.org/jira/browse/HIVE-1506
Project: Hadoop Hive
Issue Type: Improvement
Reporter: He Yongqiang
Right now,
select key, INPUT__FILE__NAME, count(value from src group by key,
INPUT__FILE__NAME sort by key
require 2 jobs
and
select key, INPUT__FILE__NAME, count(value from src group by key,
INPUT__FILE__NAME sort by key limit 3
require 3 jobs.
Both can be done with just one job.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
