[CALCITE-3993] Add isDefault(), keys(), keyBits() to RelTrait interface

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.24.0
• Component/s: core
• Assignee: Unassigned
• Reporter: Haisheng Yuan
• Created: 13/May/20 00:35
• Updated: 25/Jul/20 15:00
• Resolved: 30/May/20 03:45

Description

It is an extremely frequent usage to check whether the distribution is default (ANY), the collation is default (EMPTY).

Also add the following to RelCollation

ImmutableIntList getKeys();