Package com.orientechnologies.orient.core.sql.operator

Enum OIndexReuseType

java.lang.Object

java.lang.Enum<OIndexReuseType>

com.orientechnologies.orient.core.sql.operator.OIndexReuseType

All Implemented Interfaces:

Serializable, Comparable<OIndexReuseType>, java.lang.constant.Constable

public enum OIndexReuseType
extends Enum<OIndexReuseType>

Represents hint how index can be used to calculate result of operator execution.

Author:

Andrey Lomakin (a.lomakin-at-orientdb.com)

See Also:

• OQueryOperator.getIndexReuseType(Object, Object)

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
INDEX_INTERSECTION	Results of this operator can be calculated as intersection of results for left and right operators.
INDEX_METHOD	Result of execution of this operator can be replaced by call to one of OIndex methods.
INDEX_OPERATOR	Result of execution of this operator can be replaced by call to one of OIndex methods depending on user implementation.
INDEX_UNION	Results of this operator can be calculated as union of results for left and right operators.
NO_INDEX	Index cna be used to calculate result of given operator.

Method Summary

Modifier and Type	Method	Description
static OIndexReuseType	valueOf(String name)	Returns the enum constant of this type with the specified name.
static OIndexReuseType[]	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

INDEX_INTERSECTION

public static final OIndexReuseType INDEX_INTERSECTION

Results of this operator can be calculated as intersection of results for left and right operators.

INDEX_UNION

public static final OIndexReuseType INDEX_UNION

Results of this operator can be calculated as union of results for left and right operators.

NO_INDEX

public static final OIndexReuseType NO_INDEX

Index cna be used to calculate result of given operator.

INDEX_METHOD

public static final OIndexReuseType INDEX_METHOD

Result of execution of this operator can be replaced by call to one of OIndex methods.

INDEX_OPERATOR

public static final OIndexReuseType INDEX_OPERATOR

Result of execution of this operator can be replaced by call to one of OIndex methods depending on user implementation.

Method Details

values

public static OIndexReuseType[] 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 OIndexReuseType 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