[CALCITE-4929] Add default methods for getDef on metadata handlers

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.29.0
• Labels: pull-request-available
• Assignee: Unassigned
• Reporter: Jacques Nadeau
• Created: 09/Dec/21 22:28
• Updated: 04/Jan/22 08:27
• Resolved: 04/Jan/22 08:27

Description

Right now, metadata handler implementations must implement a getDef() method. The values are singletons next to the interface definitions. This change proposes making these singletons be returned automatically by default methods rather than implementers needing to implement these known values.

Issue Links

• links to: GitHub Pull Request #2639