Package org.apache.calcite.rel.metadata

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.

Field Summary

Fields

Modifier and Type	Field	Description
static RelMetadataProvider	SOURCE

Method Summary

Modifier and Type	Method	Description
Boolean	areColumnsUnique(HepRelVertex rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(RelSubset rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Converter rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Aggregate rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Calc rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Correlate rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Exchange rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Filter rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Intersect rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Join rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Minus rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Project rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(SetOp rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Sort rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(TableModify rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(TableScan rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Values rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(RelNode rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)	Catch-all implementation for BuiltInMetadata.ColumnUniqueness.areColumnsUnique(ImmutableBitSet, boolean), invoked using reflection, for any relational expression not handled by a more specific method.
MetadataDef<BuiltInMetadata.ColumnUniqueness>	getDef()

Methods inherited from class java.lang.Object

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

Field Details

SOURCE

public static final RelMetadataProvider SOURCE

Method Details

getDef

public MetadataDef<BuiltInMetadata.ColumnUniqueness> getDef()

Specified by:

getDef in interface MetadataHandler<BuiltInMetadata.ColumnUniqueness>

areColumnsUnique

public Boolean areColumnsUnique(TableScan rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Filter rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(RelNode rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

Catch-all implementation for BuiltInMetadata.ColumnUniqueness.areColumnsUnique(ImmutableBitSet, boolean), invoked using reflection, for any relational expression not handled by a more specific method.

Parameters:

rel - Relational expression

mq - Metadata query

columns - column mask representing the subset of columns for which uniqueness will be determined

ignoreNulls - if true, ignore null values when determining column uniqueness

Returns:

whether the columns are unique, or null if not enough information is available to make that determination

See Also:

RelMetadataQuery.areColumnsUnique(RelNode, ImmutableBitSet, boolean)

areColumnsUnique

public Boolean areColumnsUnique(SetOp rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Intersect rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Minus rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Sort rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(TableModify rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Exchange rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Correlate rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Project rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Calc rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Join rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Aggregate rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Values rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(Converter rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(HepRelVertex rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)

areColumnsUnique

public Boolean areColumnsUnique(RelSubset rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)