Module com.darkcollective.relix.plan

Package com.darkcollective.relix.plan

Enum Class PhysicalNode.JoinAlgorithm

java.lang.Object

java.lang.Enum<PhysicalNode.JoinAlgorithm>

com.darkcollective.relix.plan.PhysicalNode.JoinAlgorithm

All Implemented Interfaces:

Serializable, Comparable<PhysicalNode.JoinAlgorithm>, Constable

Enclosing interface:

PhysicalNode

public static enum PhysicalNode.JoinAlgorithm
extends Enum<PhysicalNode.JoinAlgorithm>

How a join is executed.

• HASH — builds a hash index on the build side, probes with the stream side. O(build-side) memory, O(1) probe per row.
• NESTED_LOOP — nested iteration; used when no equi-join key is available. O(1) memory but O(left × right) time.
• MERGE — sort-merge join; requires both inputs sorted on the join keys (enforced by the planner via inserted PhysicalNode.Sort nodes). O(1) memory once inputs are in order; supports early termination.

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
HASH
MERGE
NESTED_LOOP

Method Summary

Modifier and Type	Method	Description
static PhysicalNode.JoinAlgorithm	valueOf(String name)	Returns the enum constant of this class with the specified name.
static PhysicalNode.JoinAlgorithm[]	values()	Returns an array containing the constants of this enum class, 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

HASH

public static final PhysicalNode.JoinAlgorithm HASH

NESTED_LOOP

public static final PhysicalNode.JoinAlgorithm NESTED_LOOP

MERGE

public static final PhysicalNode.JoinAlgorithm MERGE

Method Details

values

public static PhysicalNode.JoinAlgorithm[] values()

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

Returns:

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

valueOf

public static PhysicalNode.JoinAlgorithm valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified name

NullPointerException - if the argument is null