Class RelMdColumnUniqueness

java.lang.Object
org.apache.calcite.rel.metadata.RelMdColumnUniqueness
All Implemented Interfaces:
MetadataHandler<BuiltInMetadata.ColumnUniqueness>

public class RelMdColumnUniqueness
extends Object
implements MetadataHandler<BuiltInMetadata.ColumnUniqueness>
RelMdColumnUniqueness supplies a default implementation of RelMetadataQuery.areColumnsUnique(org.apache.calcite.rel.RelNode, org.apache.calcite.util.ImmutableBitSet) for the standard logical algebra.