Package org.apache.calcite.rel

Class RelDistributions

java.lang.Object

org.apache.calcite.rel.RelDistributions

public class RelDistributions
extends Object

Utilities concerning RelDistribution.

Field Summary

Fields

Modifier and Type	Field	Description
static final RelDistribution	ANY
static final RelDistribution	BROADCAST_DISTRIBUTED	The singleton broadcast distribution.
static final ImmutableIntList	EMPTY
static final RelDistribution	RANDOM_DISTRIBUTED	The singleton random distribution.
static final RelDistribution	ROUND_ROBIN_DISTRIBUTED	The singleton round-robin distribution.
static final RelDistribution	SINGLETON	The singleton singleton distribution.

Method Summary

Modifier and Type	Method	Description
static RelDistribution	hash(Collection<? extends Number> numbers)	Creates a hash distribution.
static RelDistribution	of(RelDistribution.Type type, ImmutableIntList keys)
static RelDistribution	range(Collection<? extends Number> numbers)	Creates a range distribution.

Methods inherited from class java.lang.Object

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

Field Details

EMPTY

public static final ImmutableIntList EMPTY

SINGLETON

public static final RelDistribution SINGLETON

The singleton singleton distribution.

RANDOM_DISTRIBUTED

public static final RelDistribution RANDOM_DISTRIBUTED

The singleton random distribution.

ROUND_ROBIN_DISTRIBUTED

public static final RelDistribution ROUND_ROBIN_DISTRIBUTED

The singleton round-robin distribution.

BROADCAST_DISTRIBUTED

public static final RelDistribution BROADCAST_DISTRIBUTED

The singleton broadcast distribution.

ANY

public static final RelDistribution ANY

Method Details

hash

public static RelDistribution hash(Collection<? extends Number> numbers)

Creates a hash distribution.

range

public static RelDistribution range(Collection<? extends Number> numbers)

Creates a range distribution.

of

public static RelDistribution of(RelDistribution.Type type,
 ImmutableIntList keys)