[HIVE-195] map-side joins are not supported

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.4.0
• Component/s: Query Processor
• Hadoop Flags: Reviewed
• Release Note: HIVE-195. Map-side join. (Namit Jain via zshao)
• Assignee: Namit Jain
• Reporter: Namit Jain
• Created: 23/Dec/08 23:23
• Updated: 17/Dec/11 00:07
• Resolved: 04/Jun/09 02:26

Description

map-side joins are not supported.

If all the tables but one are small and can fit in memory, the join should be performed on the map-side. Ideally, it should be all cost-based, but
to start with, the user should be given an option to specify that he needs a map-side join.

Issue Links

• is related to: HIVE-917 Bucketed Map Join