[CALCITE-3983] Add utility methods to RelTraitSet

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.23.0
• Component/s: core
• Assignee: Unassigned
• Reporter: Haisheng Yuan
• Created: 09/May/20 04:21
• Updated: 24/May/20 12:00
• Resolved: 10/May/20 23:13

Description

Add the following methods to RelTraitSet:

boolean isDefault();

// Convenient methods to get the reltrait defined by
// Calcite, return null if default trait
// defs are not registered.
getConvention();
getDistribution();
getCollation();