sorted merge join
-----------------
Key: HIVE-1194
URL: https://issues.apache.org/jira/browse/HIVE-1194
Project: Hadoop Hive
Issue Type: New Feature
Components: Query Processor
Reporter: Namit Jain
Assignee: He Yongqiang
Fix For: 0.6.0
If the input tables are sorted on the join key, and a mapjoin is being
performed, it is useful to exploit the sorted properties of the table.
This can lead to substantial cpu savings - this needs to work across bucketed
map joins also.
Since, sorted properties of a table are not enforced currently, a new parameter
can be added to specify to use the sort-merge join.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
