org.axiondb.functions
Class DateDiffFunction
java.lang.Object
org.axiondb.BaseSelectable
org.axiondb.functions.BaseFunction
org.axiondb.functions.DateDiffFunction
- All Implemented Interfaces:
- Serializable, Function, FunctionFactory, ConcreteFunction, ScalarFunction, Selectable
public class DateDiffFunction
- extends BaseFunction
- implements ScalarFunction, FunctionFactory
Syntax: DATEDIFF(interval_type, timestamp1, timestamp2)
- Version:
- $Revision: 1.16 $ $Date: 2005/05/02 22:28:41 $
- See Also:
- Serialized Form
DateDiffFunction
public DateDiffFunction()
- Creates a new instance of Class
makeNewInstance
public ConcreteFunction makeNewInstance()
- Specified by:
makeNewInstance
in interface FunctionFactory
getDataType
public DataType getDataType()
DataType
- Specified by:
getDataType
in interface Selectable
- Specified by:
getDataType
in class BaseFunction
evaluate
public Object evaluate(RowDecorator row)
throws AxionException
- Returns integer difference (timestamp2 - timestamp1) in units of interval of type
interval_type. Valid interval types are {day, month, year, second, millisecond,
minute, hour, week, quarter}
- Specified by:
evaluate
in interface ScalarFunction
- Specified by:
evaluate
in interface Selectable
- Throws:
AxionException
isValid
public boolean isValid()
- Specified by:
isValid
in interface ConcreteFunction
- Specified by:
isValid
in class BaseFunction