[HIVE-5973] SMB joins produce incorrect results with multiple partitions and buckets

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.13.0
• Fix Version/s: 0.13.0
• Component/s: Query Processor
• Assignee: Vikram Dixit K
• Reporter: Vikram Dixit K
• Created: 06/Dec/13 03:42
• Updated: 17/Dec/13 00:39
• Resolved: 17/Dec/13 00:39

Description

It looks like there is an issue with re-using the output object array in the select operator. When we read rows of the non-big tables, we hold on to the output object in the priority queue. This causes hive to produce incorrect results because all the elements in the priority queue refer to the same object and the join happens on only one of the buckets.

output[i] = eval[i].evaluate(row);