Function

This class implements most built-in functions of this database.

Methods
static Function	getFunction(Database database, String name) Get an instance of the given function for this database.
static Function	getFunction(Database database, String name) Get an instance of the given function for this database. If no function with this name is found, null is returned. Parameters: database - the database name - the function name Returns: the function object or null
void	checkParameterCount(int len) Check if the parameter count is correct.
void	checkParameterCount(int len) Check if the parameter count is correct. Parameters: len - the number of parameters set Throws: DbException - if the parameter count is incorrect
void	doneWithParameters() This method is called after all the parameters have been set.
void	doneWithParameters() This method is called after all the parameters have been set. It checks if the parameter count is correct. Throws: DbException - if the parameter count is incorrect.
Expression[]	getArgs()
Expression[]	getArgs()
int	getCost()
int	getCost()
int	getDisplaySize()
int	getDisplaySize()
int	getFunctionType()
int	getFunctionType()
String	getName()
String	getName()
long	getPrecision()
long	getPrecision()
String	getSQL()
String	getSQL()
int	getScale()
int	getScale()
int	getType()
int	getType()
Value	getValue(Session session)
Value	getValue(Session session)
ValueResultSet	getValueForColumnList(Session session, Expression[] argList)
ValueResultSet	getValueForColumnList(Session session, Expression[] argList)
boolean	isBufferResultSetToLocalTemp()
boolean	isBufferResultSetToLocalTemp()
boolean	isDeterministic()
boolean	isDeterministic()
boolean	isEverything(ExpressionVisitor visitor)
boolean	isEverything(ExpressionVisitor visitor)
void	mapColumns(ColumnResolver resolver, int level)
void	mapColumns(ColumnResolver resolver, int level)
Expression	optimize(Session session)
Expression	optimize(Session session)
void	setDataType(Column col)
void	setDataType(Column col)
void	setEvaluatable(TableFilter tableFilter, boolean b)
void	setEvaluatable(TableFilter tableFilter, boolean b)
void	setParameter(int index, Expression param) Set the parameter expression at the given index.
void	setParameter(int index, Expression param) Set the parameter expression at the given index. Parameters: index - the index (0, 1,...) param - the expression
void	updateAggregate(Session session)
void	updateAggregate(Session session)