Package org.apache.calcite.rel

Enum RelDistribution.Type

java.lang.Object

java.lang.Enum<RelDistribution.Type>

org.apache.calcite.rel.RelDistribution.Type

All Implemented Interfaces:

Serializable, Comparable<RelDistribution.Type>, Constable

Enclosing interface:

RelDistribution

public static enum RelDistribution.Type
extends Enum<RelDistribution.Type>

Type of distribution.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
ANY	Not a valid distribution, but indicates that a consumer will accept any distribution.
BROADCAST_DISTRIBUTED	There are multiple instances of the stream, and all records appear in each instance.
HASH_DISTRIBUTED	There are multiple instances of the stream, and each instance contains records whose keys hash to a particular hash value.
RANDOM_DISTRIBUTED	There are multiple instances of the stream, and each instance contains randomly chosen records.
RANGE_DISTRIBUTED	There are multiple instances of the stream, and each instance contains records whose keys fall into a particular range.
ROUND_ROBIN_DISTRIBUTED	There are multiple instances of the stream, and records are assigned to instances in turn.
SINGLETON	There is only one instance of the stream.

Field Summary

Fields

Modifier and Type	Field	Description
final String	shortName

Method Summary

Modifier and Type	Method	Description
static RelDistribution.Type	valueOf(String name)	Returns the enum constant of this type with the specified name.
static RelDistribution.Type[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

SINGLETON

public static final RelDistribution.Type SINGLETON

There is only one instance of the stream. It sees all records.

HASH_DISTRIBUTED

public static final RelDistribution.Type HASH_DISTRIBUTED

There are multiple instances of the stream, and each instance contains records whose keys hash to a particular hash value. Instances are disjoint; a given record appears on exactly one stream.

RANGE_DISTRIBUTED

public static final RelDistribution.Type RANGE_DISTRIBUTED

There are multiple instances of the stream, and each instance contains records whose keys fall into a particular range. Instances are disjoint; a given record appears on exactly one stream.

RANDOM_DISTRIBUTED

public static final RelDistribution.Type RANDOM_DISTRIBUTED

There are multiple instances of the stream, and each instance contains randomly chosen records. Instances are disjoint; a given record appears on exactly one stream.

ROUND_ROBIN_DISTRIBUTED

public static final RelDistribution.Type ROUND_ROBIN_DISTRIBUTED

There are multiple instances of the stream, and records are assigned to instances in turn. Instances are disjoint; a given record appears on exactly one stream.

BROADCAST_DISTRIBUTED

public static final RelDistribution.Type BROADCAST_DISTRIBUTED

There are multiple instances of the stream, and all records appear in each instance.

ANY

public static final RelDistribution.Type ANY

Not a valid distribution, but indicates that a consumer will accept any distribution.

Field Details

shortName

public final String shortName

Method Details

values

public static RelDistribution.Type[] values()

Returns an array containing the constants of this enum type, in the order they are declared.

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static RelDistribution.Type valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null