[HIVE-8412] Make reduce side join work for all join queries [Spark Branch]

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.1.0
• Component/s: Spark
• Labels: Spark-M2
• Assignee: Xuefu Zhang
• Reporter: Xuefu Zhang
• Created: 09/Oct/14 04:57
• Updated: 29/May/15 02:27
• Resolved: 09/Oct/14 23:01

Description

Regardless all these join related optimizations such as map join, bucket join, skewed join, etc, reduce side join is the fallback. That means, if a join query wasn't taken care of by any of the optimization, it should work with reduce side join (might in a less optimal fashion).

It's found that this isn't case at the moment. For instance, auto_sortmerge_join_1.q failed to execute on Spark.

Issue Links

• is required by: HIVE-8422 Turn on all join .q tests [Spark Branch]