com.orientechnologies.orient.core.sql.operator

Class OQueryOperatorEquals

java.lang.Object

com.orientechnologies.orient.core.sql.operator.OQueryOperator

com.orientechnologies.orient.core.sql.operator.OQueryOperatorEquality

com.orientechnologies.orient.core.sql.operator.OQueryOperatorEqualityNotNulls

com.orientechnologies.orient.core.sql.operator.OQueryOperatorEquals

public class OQueryOperatorEquals
extends OQueryOperatorEqualityNotNulls

EQUALS operator.

Author:

Luca Garulli

Nested Class Summary

Nested classes/interfaces inherited from class com.orientechnologies.orient.core.sql.operator.OQueryOperator

OQueryOperator.ORDER

Field Summary

Fields inherited from class com.orientechnologies.orient.core.sql.operator.OQueryOperator

DEFAULT_OPERATORS_ORDER, expectedRightWords, expectsParameters, keyword, precedence, unary

Constructor Summary

Constructors

Constructor and Description
OQueryOperatorEquals()

Method Summary

Modifier and Type	Method and Description
protected static boolean	comparesValues(Object iValue, ORecord iRecord, boolean iConsiderIn)
static boolean	equals(Object iLeft, Object iRight)
static boolean	equals(Object iLeft, Object iRight, OType type)
boolean	evaluate(OBinaryField iFirstField, OBinaryField iSecondField, OCommandContext iContext)
protected boolean	evaluateExpression(OIdentifiable iRecord, OSQLFilterCondition iCondition, Object iLeft, Object iRight, OCommandContext iContext)
OIndexCursor	executeIndexQuery(OCommandContext iContext, OIndex<?> index, List<Object> keyParams, boolean ascSortOrder) Performs index query and returns index cursor which presents subset of index data which corresponds to result of execution of given operator.
ORID	getBeginRidRange(Object iLeft, Object iRight)
ORID	getEndRidRange(Object iLeft, Object iRight)
OIndexReuseType	getIndexReuseType(Object iLeft, Object iRight) Returns hint how index can be used to calculate result of operator execution.
boolean	isSupportingBinaryEvaluate()

Methods inherited from class com.orientechnologies.orient.core.sql.operator.OQueryOperatorEqualityNotNulls

evaluateRecord

Methods inherited from class com.orientechnologies.orient.core.sql.operator.OQueryOperator

canBeMerged, canShortCircuit, compare, configure, getOIndexSearchResult, getSyntax, isUnary, toString, updateProfiler

Methods inherited from class java.lang.Object

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

Constructor Detail

OQueryOperatorEquals

public OQueryOperatorEquals()

Method Detail

equals

public static boolean equals(Object iLeft,
                             Object iRight,
                             OType type)

equals

public static boolean equals(Object iLeft,
                             Object iRight)

comparesValues

protected static boolean comparesValues(Object iValue,
                                        ORecord iRecord,
                                        boolean iConsiderIn)

getIndexReuseType

public OIndexReuseType getIndexReuseType(Object iLeft,
                                         Object iRight)

Description copied from class: OQueryOperator

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

Specified by:

getIndexReuseType in class OQueryOperator

Parameters:

iLeft - Value of left query parameter.

iRight - Value of right query parameter.

Returns:

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

executeIndexQuery

public OIndexCursor executeIndexQuery(OCommandContext iContext,
                                      OIndex<?> index,
                                      List<Object> keyParams,
                                      boolean ascSortOrder)

Description copied from class: OQueryOperator

Performs index query and returns index cursor which presents subset of index data which corresponds to result of execution of given operator.

Query that should be executed can be presented like: [[property0 = keyParam0] and [property1 = keyParam1] and] propertyN operator keyParamN.

It is supped that index which passed in as parameter is used to index properties listed above and responsibility of given method execute query using given parameters.

Multiple parameters are passed in to implement composite indexes support.

Overrides:

executeIndexQuery in class OQueryOperator

index - Instance of index that will be used to calculate result of operator execution.

keyParams - Parameters of query is used to calculate query result.

ascSortOrder - Data returned by cursors should be sorted in ascending or descending order.

Returns:

Cursor instance if index can be used to evaluate result of execution of given operator and null otherwise.

getBeginRidRange

public ORID getBeginRidRange(Object iLeft,
                             Object iRight)

Specified by:

getBeginRidRange in class OQueryOperator

getEndRidRange

public ORID getEndRidRange(Object iLeft,
                           Object iRight)

Specified by:

getEndRidRange in class OQueryOperator

evaluateExpression

protected boolean evaluateExpression(OIdentifiable iRecord,
                                     OSQLFilterCondition iCondition,
                                     Object iLeft,
                                     Object iRight,
                                     OCommandContext iContext)

Specified by:

evaluateExpression in class OQueryOperatorEquality

evaluate

public boolean evaluate(OBinaryField iFirstField,
                        OBinaryField iSecondField,
                        OCommandContext iContext)

Overrides:

evaluate in class OQueryOperatorEquality

isSupportingBinaryEvaluate

public boolean isSupportingBinaryEvaluate()

Overrides:

isSupportingBinaryEvaluate in class OQueryOperator