[HIVE-5866] Hive divide operator generates wrong results in certain cases

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.13.0
• Fix Version/s: 0.13.0
• Assignee: Xuefu Zhang Assign to me
• Reporter: Xuefu Zhang
• Created: 21/Nov/13 18:07
• Updated: 04/Dec/13 20:53
• Resolved: 04/Dec/13 02:37

Description

Current GenericUDFOPDivide seems having a bug. The following query generates NULL result.

hive> select 4BD / 25BD  from test limit 1;        
...
Total MapReduce CPU Time Spent: 890 msec
OK
NULL
Time taken: 7.901 seconds, Fetched: 1 row(s)

The correct result should be 0.16 in this query.

Issue Links

• is depended upon by: HIVE-5872 Make UDAFs such as GenericUDAFSum report accurate precision/scale for decimal types
• is part of: HIVE-3976 Support specifying scale and precision with Hive decimal type
• links to: https://reviews.apache.org/r/15804/