org.axiondb.functions
Class ConcatFunction
java.lang.Object
org.axiondb.BaseSelectable
org.axiondb.functions.BaseFunction
org.axiondb.functions.ConcatFunction
- All Implemented Interfaces:
- ConcreteFunction, Function, FunctionFactory, ScalarFunction, Selectable, Serializable
- public class ConcatFunction
- extends BaseFunction
- implements ScalarFunction, FunctionFactory
CONCAT(string [, string]*)
:
concatenates one or more strings
.
Evaluates to NULL
if any of the arguments
are null
.
- Version:
- $Revision: 1.4 $ $Date: 2004/09/09 23:47:44 $
- See Also:
- Serialized Form
Methods inherited from class org.axiondb.functions.BaseFunction |
addArgument, getAlias, getArgument, getArgumentCount, getLabel, getName, setAlias, setArgument, setName, setVariableContext, toString |
ConcatFunction
public ConcatFunction()
makeNewInstance
public ConcreteFunction makeNewInstance()
- Specified by:
makeNewInstance
in interface FunctionFactory
getDataType
public DataType getDataType()
StringType
- Specified by:
getDataType
in interface Selectable
- Specified by:
getDataType
in class BaseFunction
evaluate
public Object evaluate(RowDecorator row)
throws AxionException
- Specified by:
evaluate
in interface ScalarFunction
- Throws:
AxionException
isValid
public boolean isValid()
- Specified by:
isValid
in interface ConcreteFunction
- Specified by:
isValid
in class BaseFunction