[SPARK-8828] Revert the change of SPARK-5680

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.3.1, 1.4.0
• Fix Version/s: 1.5.0
• Component/s: SQL
• Target Version/s: 1.5.0
• Assignee: Yijie Shen
• Reporter: Yin Huai
• Created: 06/Jul/15 03:42
• Updated: 28/Jul/15 13:00
• Resolved: 28/Jul/15 06:01

Description

SPARK-5680 introduced a bug to sum function. After this change, when all input values are nulls, it returns 0.0 instead of null, which is wrong.

Issue Links

• is broken by: SPARK-5680 Sum function on all null values, should return zero
• links to: [Github] Pull Request #7667 (yjshen)