org.axiondb.functions

Class CoalesceFunction

public class CoalesceFunction extends BaseFunction implements ScalarFunction, FunctionFactory

COALESCE([value]+): returns the first non-null value in the argument list.

Version: $Revision: 1.5 $ $Date: 2005/12/20 18:32:28 $

Author: Amrish Lal

Constructor Summary
CoalesceFunction()
Method Summary
Objectevaluate(RowDecorator row)
DataTypegetDataType()
booleanisValid()
ConcreteFunctionmakeNewInstance()

Constructor Detail

CoalesceFunction

public CoalesceFunction()

Method Detail

evaluate

public Object evaluate(RowDecorator row)

getDataType

public DataType getDataType()

isValid

public boolean isValid()

makeNewInstance

public ConcreteFunction makeNewInstance()