com.orientechnologies.orient.core.sql.parser

Class OValueExpression

java.lang.Object

com.orientechnologies.orient.core.sql.parser.SimpleNode

com.orientechnologies.orient.core.sql.parser.OExpression

com.orientechnologies.orient.core.sql.parser.OValueExpression

All Implemented Interfaces:

Node

public class OValueExpression
extends OExpression

this class is only used by the query executor to store pre-calculated values and store them in a temporary AST. It's not produced by parsing

Field Summary

Fields inherited from class com.orientechnologies.orient.core.sql.parser.OExpression

arrayConcatExpression, booleanValue, doubleQuotes, isNull, json, mathExpression, rid, singleQuotes

Fields inherited from class com.orientechnologies.orient.core.sql.parser.SimpleNode

children, firstToken, id, lastToken, parent, parser, value

Constructor Summary

Constructors

Constructor and Description
OValueExpression(Object val)

Method Summary

Modifier and Type	Method and Description
boolean	allowsIndexedFunctionExecutionOnTarget(OFromClause target, OCommandContext context, OBinaryCompareOperator operator, Object right) tests if current expression is an indexed function AND that function can be used on this target
void	applyRemove(OResultInternal result, OCommandContext ctx)
boolean	canExecuteIndexedFunctionWithoutIndex(OFromClause target, OCommandContext context, OBinaryCompareOperator operator, Object right) tests if current expression is an indexed function AND that function can also be executed without using the index
OValueExpression	copy()
void	deserialize(OResult fromResult)
boolean	equals(Object o)
Object	execute(OIdentifiable iCurrentRecord, OCommandContext ctx)
Object	execute(OResult iCurrentRecord, OCommandContext ctx)
boolean	executeIndexedFunctionAfterIndexSearch(OFromClause target, OCommandContext context, OBinaryCompareOperator operator, Object right) tests if current expression is an indexed function AND the function has also to be executed after the index search.
void	extractSubQueries(OIdentifier letAlias, SubQueryCollector collector)
void	extractSubQueries(SubQueryCollector collector)
AggregationContext	getAggregationContext(OCommandContext ctx)
OCollate	getCollate(OResult currentRecord, OCommandContext ctx)
OIdentifier	getDefaultAlias()
OValueExpression	getExpandContent()
int	hashCode()
boolean	isAggregate()
boolean	isBaseIdentifier()
boolean	isCacheable()
boolean	isCount()
boolean	isDefinedFor(OElement currentRecord)
boolean	isDefinedFor(OResult currentRecord)
boolean	isEarlyCalculated()
boolean	isExpand()
boolean	isIndexedFunctionCal()
boolean	needsAliases(Set<String> aliases)
boolean	refersToParent()
OResult	serialize()
OValueExpression	splitForAggregation(AggregateProjectionSplit aggregateSplit)
boolean	supportsBasicCalculation()
void	toString(Map<Object,Object> params, StringBuilder builder)

Methods inherited from class com.orientechnologies.orient.core.sql.parser.OExpression

encode, encodeSingle, estimateIndexedFunction, executeIndexedFunction, getArrayConcatExpression, getMathExpression, getRid, isEarlyCalculated, isFunctionAny, isIndexChain, setArrayConcatExpression, setMathExpression, setRid, splitForAggregation

Methods inherited from class com.orientechnologies.orient.core.sql.parser.SimpleNode

childrenAccept, dump, getDatabase, getValue, jjtAccept, jjtAddChild, jjtClose, jjtGetChild, jjtGetFirstToken, jjtGetLastToken, jjtGetNumChildren, jjtGetParent, jjtGetValue, jjtOpen, jjtSetFirstToken, jjtSetLastToken, jjtSetParent, jjtSetValue, toString, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

OValueExpression

public OValueExpression(Object val)

Method Detail

execute

public Object execute(OIdentifiable iCurrentRecord,
                      OCommandContext ctx)

Overrides:

execute in class OExpression

execute

public Object execute(OResult iCurrentRecord,
                      OCommandContext ctx)

Overrides:

execute in class OExpression

isBaseIdentifier

public boolean isBaseIdentifier()

Overrides:

isBaseIdentifier in class OExpression

isEarlyCalculated

public boolean isEarlyCalculated()

getDefaultAlias

public OIdentifier getDefaultAlias()

Overrides:

getDefaultAlias in class OExpression

toString

public void toString(Map<Object,Object> params,
                     StringBuilder builder)

Overrides:

toString in class OExpression

supportsBasicCalculation

public boolean supportsBasicCalculation()

Overrides:

supportsBasicCalculation in class OExpression

isIndexedFunctionCal

public boolean isIndexedFunctionCal()

Overrides:

isIndexedFunctionCal in class OExpression

canExecuteIndexedFunctionWithoutIndex

public boolean canExecuteIndexedFunctionWithoutIndex(OFromClause target,
                                                     OCommandContext context,
                                                     OBinaryCompareOperator operator,
                                                     Object right)

Description copied from class: OExpression

tests if current expression is an indexed function AND that function can also be executed without using the index

Overrides:

canExecuteIndexedFunctionWithoutIndex in class OExpression

Parameters:

target - the query target

context - the execution context

Returns:

true if current expression is an indexed funciton AND that function can also be executed without using the index, false otherwise

allowsIndexedFunctionExecutionOnTarget

public boolean allowsIndexedFunctionExecutionOnTarget(OFromClause target,
                                                      OCommandContext context,
                                                      OBinaryCompareOperator operator,
                                                      Object right)

Description copied from class: OExpression

tests if current expression is an indexed function AND that function can be used on this target

Overrides:

allowsIndexedFunctionExecutionOnTarget in class OExpression

Parameters:

target - the query target

context - the execution context

Returns:

true if current expression involves an indexed function AND that function can be used on this target, false otherwise

executeIndexedFunctionAfterIndexSearch

public boolean executeIndexedFunctionAfterIndexSearch(OFromClause target,
                                                      OCommandContext context,
                                                      OBinaryCompareOperator operator,
                                                      Object right)

Description copied from class: OExpression

tests if current expression is an indexed function AND the function has also to be executed after the index search. In some cases, the index search is accurate, so this condition can be excluded from further evaluation. In other cases the result from the index is a superset of the expected result, so the function has to be executed anyway for further filtering

Overrides:

executeIndexedFunctionAfterIndexSearch in class OExpression

Parameters:

target - the query target

context - the execution context

Returns:

true if current expression involves an indexed function AND the function has also to be executed after the index search.

isExpand

public boolean isExpand()

Overrides:

isExpand in class OExpression

getExpandContent

public OValueExpression getExpandContent()

Overrides:

getExpandContent in class OExpression

needsAliases

public boolean needsAliases(Set<String> aliases)

Overrides:

needsAliases in class OExpression

isAggregate

public boolean isAggregate()

Overrides:

isAggregate in class OExpression

splitForAggregation

public OValueExpression splitForAggregation(AggregateProjectionSplit aggregateSplit)

getAggregationContext

public AggregationContext getAggregationContext(OCommandContext ctx)

Overrides:

getAggregationContext in class OExpression

copy

public OValueExpression copy()

Overrides:

copy in class OExpression

equals

public boolean equals(Object o)

Overrides:

equals in class OExpression

hashCode

public int hashCode()

Overrides:

hashCode in class OExpression

extractSubQueries

public void extractSubQueries(SubQueryCollector collector)

Overrides:

extractSubQueries in class OExpression

extractSubQueries

public void extractSubQueries(OIdentifier letAlias,
                              SubQueryCollector collector)

Overrides:

extractSubQueries in class OExpression

refersToParent

public boolean refersToParent()

Overrides:

refersToParent in class OExpression

applyRemove

public void applyRemove(OResultInternal result,
                        OCommandContext ctx)

Overrides:

applyRemove in class OExpression

isCount

public boolean isCount()

Overrides:

isCount in class OExpression

serialize

public OResult serialize()

Overrides:

serialize in class OExpression

deserialize

public void deserialize(OResult fromResult)

Overrides:

deserialize in class OExpression

isDefinedFor

public boolean isDefinedFor(OResult currentRecord)

Overrides:

isDefinedFor in class OExpression

isDefinedFor

public boolean isDefinedFor(OElement currentRecord)

Overrides:

isDefinedFor in class OExpression

getCollate

public OCollate getCollate(OResult currentRecord,
                           OCommandContext ctx)

Overrides:

getCollate in class OExpression

isCacheable

public boolean isCacheable()

Overrides:

isCacheable in class OExpression