com.hazelcast.org.apache.calcite.plan.RelMultipleTrait Maven / Gradle / Ivy
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package com.hazelcast.org.apache.calcite.plan;
/**
* Trait for which a given relational expression can have multiple values.
*
* The most common example is sorted-ness (collation). The TIME dimension
* table might be sorted by [year, month, date] and also by [time_id].
*/
public interface RelMultipleTrait
extends RelTrait, Comparable {
/** Returns whether this trait is satisfied by every instance of the trait
* (including itself). */
boolean isTop();
}