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 final RelMetadataProvider	SOURCE

Method Summary

Modifier and Type	Method	Description
@Nullable Boolean	areColumnsUnique(RelSubset rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable Boolean	areColumnsUnique(Converter rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable Boolean	areColumnsUnique(Aggregate rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable Boolean	areColumnsUnique(Calc rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable Boolean	areColumnsUnique(Correlate rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable Boolean	areColumnsUnique(Exchange rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable Boolean	areColumnsUnique(Filter rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Intersect rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable Boolean	areColumnsUnique(Join rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable Boolean	areColumnsUnique(Minus rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable Boolean	areColumnsUnique(Project rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(SetOp rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable Boolean	areColumnsUnique(Sort rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable Boolean	areColumnsUnique(TableModify rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(TableScan scan, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
Boolean	areColumnsUnique(Values rel, RelMetadataQuery mq, ImmutableBitSet columns, boolean ignoreNulls)
@Nullable 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 scan,
 RelMetadataQuery mq,
 ImmutableBitSet columns,
 boolean ignoreNulls)

areColumnsUnique

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

areColumnsUnique

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

areColumnsUnique

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

areColumnsUnique

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

areColumnsUnique

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

areColumnsUnique

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

areColumnsUnique

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

areColumnsUnique

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

areColumnsUnique

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

areColumnsUnique

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

areColumnsUnique

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

areColumnsUnique

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

areColumnsUnique

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