org.apache.calcite.rel.metadata

Interface BuiltInMetadata.DistinctRowCount.Handler

All Superinterfaces:

MetadataHandler<BuiltInMetadata.DistinctRowCount>

Enclosing interface:

BuiltInMetadata.DistinctRowCount

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public static interface BuiltInMetadata.DistinctRowCount.Handler
extends MetadataHandler<BuiltInMetadata.DistinctRowCount>

Handler API.

Method Summary

Modifier and Type	Method and Description
default MetadataDef<BuiltInMetadata.DistinctRowCount>	getDef()
@Nullable Double	getDistinctRowCount(RelNode r, RelMetadataQuery mq, ImmutableBitSet groupKey, @Nullable RexNode predicate)

Methods inherited from interface org.apache.calcite.rel.metadata.MetadataHandler

handlerMethods

Method Detail

getDistinctRowCount

@Nullable Double getDistinctRowCount(RelNode r,
                                     RelMetadataQuery mq,
                                     ImmutableBitSet groupKey,
                                     @Nullable RexNode predicate)

getDef

default MetadataDef<BuiltInMetadata.DistinctRowCount> getDef()

Specified by:

getDef in interface MetadataHandler<BuiltInMetadata.DistinctRowCount>