[CALCITE-4116] Remove unused code for tracking RexNode's nullable state in codegen

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.23.0
• Fix Version/s: 1.24.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Feng Zhu
• Reporter: Feng Zhu
• Created: 09/Jul/20 09:21
• Updated: 25/Jul/20 14:59
• Resolved: 14/Jul/20 02:48

Description

The PR in CALCITE-3224 takes RexNode's nullable state as immutable during codegen.

Since it has been merged, we can safely remove unused code that changes and tracks RexNode's nullable.

Issue Links

• links to: GitHub Pull Request #2060