[CALCITE-2567] Simplify IS NULL(null) to true

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.17.0
• Fix Version/s: 1.18.0
• Component/s: core
• Assignee: Julian Hyde
• Reporter: pengzhiwei
• Created: 17/Sep/18 09:19
• Updated: 23/Dec/18 00:12
• Resolved: 19/Sep/18 13:03

Description

The "is null(null)" should simplify to "true",but RexSimplify#simplifyIsNull does not work for it.

A PR have made to solve this issue at PR 835

Issue Links

• links to: PR 835