[SPARK-16633] lag/lead using constant input values does not return the default value when the offset row does not exist

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.1, 2.1.0
• Component/s: SQL
• Labels: correctness
• Target Version/s: 2.0.1
• Assignee: Yin Huai
• Reporter: Yin Huai
• Created: 19/Jul/16 22:49
• Updated: 31/Aug/16 21:16
• Resolved: 26/Jul/16 03:59

Description

Please see the attached notebook. Seems lag/lead somehow fail to recognize that a offset row does not exist and generate wrong results.

Issue Links

• links to: [Github] Pull Request #14284 (yhuai)