Provide a method for handling error conditions raised during database processing.
VORDDClasses (in VORDDClasses.dll) Version: 2.7
Syntax Request Example
VIRTUAL METHOD Error(
oError AS USUAL := NIL,
symMethod AS USUAL := NIL
) AS USUAL
public virtual Usual Error(
Usual oError = null,
Usual symMethod = null
- oError (Optional)
- Type: Usual
An Error object describing the error condition.
- symMethod (Optional)
- Type: Usual
The symbolic name of the method that originated the error.
|This is an event handler and is automatically called by other methods; the developer does not normally need to call the DBServer:Error() method, but might want to replace or amend it.|
All methods of the DBServer trap serious errors with a recover statement and send them to this method. Ordinary failures, such as locking conflicts or record-not-found, do not raise error conditions; they are simply indicated through failure return values.
The standard Error() handling method fills in some more information about the errors and about the DBServer object that originates the error, sets the status value for the server object, and passes the problem to its client, if there is one, in its standard Error() handling method. If there is no client who wants to deal with the problem, the method passes it up the call stack by issuing a BREAK with the same Error object.
|If an error comes in while one is being handled, the Error() method immediately breaks.|Examples
The Skip() method uses the Error() method like this:
1METHOD Skip(n) CLASS DBServer
2LOCAL oError AS USUAL
5RECOVER USING oError