[HIVE-22120] Fix wrong results/ArrayOutOfBound exception in left outer map joins on specific boundary conditions

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0-alpha-1
• Component/s: Hive, llap, Vectorization
• Assignee: Ramesh Kumar Thangarajan
• Reporter: Ramesh Kumar Thangarajan
• Created: 16/Aug/19 02:15
• Updated: 17/Nov/22 08:49
• Resolved: 19/Aug/19 19:48

Description

Vectorized version of left outer map join produces wrong results or encounters ArrayOutOfBound exception.

The boundary conditions are:

• The complete batch of the big table should have the join key repeated for all the join columns.
• The complete batch of the big table should have not have a matched key value in the small table
• The repeated value should not be a null value
• Some rows should be filtered out as part of the on clause filter.