org.eigenbase.rel.metadata
Class RelMdColumnUniqueness

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

All Implemented Interfaces:

RelMetadataProvider, ReflectiveVisitor

public class RelMdColumnUniqueness
extends ReflectiveRelMetadataProvider

RelMdColumnUniqueness supplies a default implementation of RelMetadataQuery.areColumnsUnique(org.eigenbase.rel.RelNode, java.util.BitSet) for the standard logical algebra.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/rel/metadata/RelMdColumnUniqueness.java#7 $

Author:

Zelaine Fong

Constructor Summary

RelMdColumnUniqueness()

Method Summary

Boolean	areColumnsUnique(AggregateRelBase rel, BitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(CorrelatorRel rel, BitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(FilterRelBase rel, BitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(JoinRelBase rel, BitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(ProjectRelBase rel, BitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(RelNode rel, BitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(SemiJoinRel rel, BitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(SortRel rel, BitSet columns, boolean ignoreNulls)

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

RelMdColumnUniqueness

public RelMdColumnUniqueness()

Method Detail

areColumnsUnique

public Boolean areColumnsUnique(FilterRelBase rel,
                                BitSet columns,
                                boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(SortRel rel,
                                BitSet columns,
                                boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(CorrelatorRel rel,
                                BitSet columns,
                                boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(ProjectRelBase rel,
                                BitSet columns,
                                boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(JoinRelBase rel,
                                BitSet columns,
                                boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(SemiJoinRel rel,
                                BitSet columns,
                                boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(AggregateRelBase rel,
                                BitSet columns,
                                boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(RelNode rel,
                                BitSet columns,
                                boolean ignoreNulls)