[HIVE-20004] Wrong scale used by ConvertDecimal64ToDecimal results in incorrect results

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 3.1.0, 3.0.1, 4.0.0
• Fix Version/s: 3.2.0, 4.0.0-alpha-1
• Target Version/s: 3.2.0, 4.0.0
• Assignee: Prasanth Jayachandran
• Reporter: Prasanth Jayachandran
• Created: 27/Jun/18 01:00
• Updated: 17/Nov/22 08:55
• Resolved: 30/Jun/18 19:42

Description

ConvertDecimal64ToDecimal uses scale from output column vector which results in incorrect results.

Input: decimal(8,1) Output: decimal(9,2)

Input value: 963.8 gets converted to 96.38 which is wrong. The scale should not change this case (value should be 963.8 even after the conversion).