Package com.arcadedb.query.sql.parser

Class MathExpression

java.lang.Object

com.arcadedb.query.sql.parser.SimpleNode

com.arcadedb.query.sql.parser.MathExpression

All Implemented Interfaces:

Node

Direct Known Subclasses:

BaseExpression, FirstLevelExpression, MultExpression, ParenthesisExpression

public class MathExpression
extends SimpleNode

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MathExpression.Operator

Field Summary

Fields

Modifier and Type	Field	Description
protected List<MathExpression>	childExpressions
protected List<MathExpression.Operator>	operators

Fields inherited from class com.arcadedb.query.sql.parser.SimpleNode

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

Constructor Summary

Constructors

Constructor	Description
MathExpression(int id)
MathExpression(SqlParser p, int id)

Method Summary

Modifier and Type	Method	Description
boolean	allowsIndexedFunctionExecutionOnTarget(FromClause target, CommandContext context, BinaryCompareOperator operator, Object right)	tests if current expression is an indexed function AND that function can be used on this target
void	applyRemove(ResultInternal result, CommandContext ctx)
boolean	canExecuteIndexedFunctionWithoutIndex(FromClause target, CommandContext context, BinaryCompareOperator operator, Object right)	tests if current expression is an indexed funciton AND that function can also be executed without using the index
MathExpression	copy()
void	deserialize(Result fromResult)
static MathExpression	deserializeFromResult(Result fromResult)
boolean	equals(Object o)
long	estimateIndexedFunction(FromClause target, CommandContext context, BinaryCompareOperator operator, Object right)
Object	execute(Identifiable iCurrentRecord, CommandContext ctx)
Object	execute(Result iCurrentRecord, CommandContext ctx)
Iterable<Record>	executeIndexedFunction(FromClause target, CommandContext context, BinaryCompareOperator operator, Object right)
boolean	executeIndexedFunctionAfterIndexSearch(FromClause target, CommandContext context, BinaryCompareOperator 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(Identifier letAlias, SubQueryCollector collector)
void	extractSubQueries(SubQueryCollector collector)
AggregationContext	getAggregationContext(CommandContext ctx)
List<MathExpression>	getChildExpressions()
Expression	getExpandContent()
List<String>	getMatchPatternInvolvedAliases()
List<MathExpression.Operator>	getOperators()
int	hashCode()
boolean	isAggregate()
boolean	isBaseIdentifier()
boolean	isCacheable()
boolean	isCount()
boolean	isDefinedFor(Record currentRecord)
boolean	isDefinedFor(Result currentRecord)
boolean	isEarlyCalculated()
boolean	isExpand()
boolean	isIndexedFunctionCall()
boolean	needsAliases(Set<String> aliases)
boolean	refersToParent()
Result	serialize()
void	setChildExpressions(List<MathExpression> childExpressions)
SimpleNode	splitForAggregation(AggregateProjectionSplit aggregateProj)
protected boolean	supportsBasicCalculation()
void	toString(Map<String,Object> params, StringBuilder builder)

Methods inherited from class com.arcadedb.query.sql.parser.SimpleNode

childrenAccept, dump, 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

Field Detail

childExpressions

protected List<MathExpression> childExpressions

operators

protected List<MathExpression.Operator> operators

Constructor Detail

MathExpression

public MathExpression(int id)

MathExpression

public MathExpression(SqlParser p,
                      int id)

Method Detail

getExpandContent

public Expression getExpandContent()

isDefinedFor

public boolean isDefinedFor(Result currentRecord)

isDefinedFor

public boolean isDefinedFor(Record currentRecord)

isCacheable

public boolean isCacheable()

execute

public Object execute(Identifiable iCurrentRecord,
                      CommandContext ctx)

execute

public Object execute(Result iCurrentRecord,
                      CommandContext ctx)

getChildExpressions

public List<MathExpression> getChildExpressions()

setChildExpressions

public void setChildExpressions(List<MathExpression> childExpressions)

getOperators

public List<MathExpression.Operator> getOperators()

toString

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

Overrides:

toString in class SimpleNode

supportsBasicCalculation

protected boolean supportsBasicCalculation()

isIndexedFunctionCall

public boolean isIndexedFunctionCall()

estimateIndexedFunction

public long estimateIndexedFunction(FromClause target,
                                    CommandContext context,
                                    BinaryCompareOperator operator,
                                    Object right)

executeIndexedFunction

public Iterable<Record> executeIndexedFunction(FromClause target,
                                               CommandContext context,
                                               BinaryCompareOperator operator,
                                               Object right)

canExecuteIndexedFunctionWithoutIndex

public boolean canExecuteIndexedFunctionWithoutIndex(FromClause target,
                                                     CommandContext context,
                                                     BinaryCompareOperator operator,
                                                     Object right)

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

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(FromClause target,
                                                      CommandContext context,
                                                      BinaryCompareOperator operator,
                                                      Object right)

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

Parameters:

target - the query target

context - the execution context

Returns:

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

executeIndexedFunctionAfterIndexSearch

public boolean executeIndexedFunctionAfterIndexSearch(FromClause target,
                                                      CommandContext context,
                                                      BinaryCompareOperator operator,
                                                      Object right)

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

Parameters:

target - the query target

context - the execution context

Returns:

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

isBaseIdentifier

public boolean isBaseIdentifier()

isEarlyCalculated

public boolean isEarlyCalculated()

needsAliases

public boolean needsAliases(Set<String> aliases)

isExpand

public boolean isExpand()

isAggregate

public boolean isAggregate()

isCount

public boolean isCount()

splitForAggregation

public SimpleNode splitForAggregation(AggregateProjectionSplit aggregateProj)

getAggregationContext

public AggregationContext getAggregationContext(CommandContext ctx)

copy

public MathExpression copy()

Overrides:

copy in class SimpleNode

extractSubQueries

public void extractSubQueries(Identifier letAlias,
                              SubQueryCollector collector)

extractSubQueries

public void extractSubQueries(SubQueryCollector collector)

refersToParent

public boolean refersToParent()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getMatchPatternInvolvedAliases

public List<String> getMatchPatternInvolvedAliases()

applyRemove

public void applyRemove(ResultInternal result,
                        CommandContext ctx)

deserializeFromResult

public static MathExpression deserializeFromResult(Result fromResult)

serialize

public Result serialize()

deserialize

public void deserialize(Result fromResult)