[HIVE-12590] Repeated UDAFs with literals can produce incorrect result

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.0.1, 1.1.1, 1.2.1, 2.0.0
• Fix Version/s: 2.0.0
• Component/s: Query Planning
• Assignee: Ashutosh Chauhan
• Reporter: Laljo John Pullokkaran
• Created: 04/Dec/15 01:31
• Updated: 16/Feb/16 23:50
• Resolved: 10/Jan/16 17:06

Description

Repeated UDAF with literals could produce wrong result.
This is not a common use case, nevertheless a bug.

hive> select max('pants'), max('pANTS') from t1 group by key;
Total MapReduce CPU Time Spent: 0 msec
OK
pANTS pANTS
pANTS pANTS
pANTS pANTS
pANTS pANTS
pANTS pANTS
Time taken: 296.252 seconds, Fetched: 5 row(s)

Issue Links

• supercedes: HIVE-11735 Different results when multiple if() functions are used
• links to: RB request