org.eigenbase.rel.metadata
Class RelMdDistinctRowCount

java.lang.Object
  org.eigenbase.rel.metadata.ReflectiveRelMetadataProvider
      org.eigenbase.rel.metadata.RelMdDistinctRowCount

All Implemented Interfaces:

RelMetadataProvider, ReflectiveVisitor

public class RelMdDistinctRowCount
extends ReflectiveRelMetadataProvider

RelMdDistinctRowCount supplies a default implementation of RelMetadataQuery.getDistinctRowCount(org.eigenbase.rel.RelNode, java.util.BitSet, org.eigenbase.rex.RexNode) for the standard logical algebra.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/rel/metadata/RelMdDistinctRowCount.java#17 $

Author:

Zelaine Fong

Constructor Summary

RelMdDistinctRowCount()

Method Summary

Double	getDistinctRowCount(AggregateRelBase rel, BitSet groupKey, RexNode predicate)
Double	getDistinctRowCount(FilterRelBase rel, BitSet groupKey, RexNode predicate)
Double	getDistinctRowCount(JoinRelBase rel, BitSet groupKey, RexNode predicate)
Double	getDistinctRowCount(ProjectRelBase rel, BitSet groupKey, RexNode predicate)
Double	getDistinctRowCount(RelNode rel, BitSet groupKey, RexNode predicate)
Double	getDistinctRowCount(SemiJoinRel rel, BitSet groupKey, RexNode predicate)
Double	getDistinctRowCount(SortRel rel, BitSet groupKey, RexNode predicate)
Double	getDistinctRowCount(UnionRelBase rel, BitSet groupKey, RexNode predicate)
Double	getDistinctRowCount(ValuesRelBase rel, BitSet groupKey, RexNode predicate)

Methods inherited from class org.eigenbase.rel.metadata.ReflectiveRelMetadataProvider

getRelMetadata, mapParameterTypes

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RelMdDistinctRowCount

public RelMdDistinctRowCount()

Method Detail

getDistinctRowCount

public Double getDistinctRowCount(UnionRelBase rel,
                                  BitSet groupKey,
                                  RexNode predicate)

getDistinctRowCount

public Double getDistinctRowCount(SortRel rel,
                                  BitSet groupKey,
                                  RexNode predicate)

getDistinctRowCount

public Double getDistinctRowCount(FilterRelBase rel,
                                  BitSet groupKey,
                                  RexNode predicate)

getDistinctRowCount

public Double getDistinctRowCount(JoinRelBase rel,
                                  BitSet groupKey,
                                  RexNode predicate)

getDistinctRowCount

public Double getDistinctRowCount(SemiJoinRel rel,
                                  BitSet groupKey,
                                  RexNode predicate)

getDistinctRowCount

public Double getDistinctRowCount(AggregateRelBase rel,
                                  BitSet groupKey,
                                  RexNode predicate)

getDistinctRowCount

public Double getDistinctRowCount(ValuesRelBase rel,
                                  BitSet groupKey,
                                  RexNode predicate)

getDistinctRowCount

public Double getDistinctRowCount(ProjectRelBase rel,
                                  BitSet groupKey,
                                  RexNode predicate)

getDistinctRowCount

public Double getDistinctRowCount(RelNode rel,
                                  BitSet groupKey,
                                  RexNode predicate)