Beginning Microsoft SQL Server 2008 ... - S3 Tech Training

Chapter 12: Stored Procedures
388
-- Set up "constants" for error codes
DECLARE @BUSINESS_ENTITY_ID_NOT_FOUND int = -1000,
@DUPLICATE_RATE_CHANGE int = -2000;
BEGIN TRY
BEGIN TRANSACTION;
UPDATE HumanResources.Employee
SET JobTitle = @JobTitle,
HireDate = @HireDate,
CurrentFlag = @CurrentFlag
WHERE BusinessEntityID = @BusinessEntityID;
IF @@ROWCOUNT > 0
-- things happened as expected
INSERT INTO HumanResources.EmployeePayHistory
(BusinessEntityID,
RateChangeDate
Rate,
PayFrequency)
VALUES
(@BusinessEntityID,
@RateChangeDate,
@Rate,
@PayFrequency);
ELSE
-- ruh roh, the update didn't happen, so skip the insert,
-- set the return value and exit
BEGIN
PRINT 'BusinessEntityID Not Found';
ROLLBACK TRAN;
RETURN @BUSINESS_ENTITY_ID_NOT_FOUND;
END
COMMIT TRANSACTION;
END TRY
BEGIN CATCH
-- Rollback any active or uncommittable transactions before
-- inserting information in the ErrorLog
IF @@TRANCOUNT > 0
BEGIN
ROLLBACK TRANSACTION;
END
EXECUTE dbo.uspLogError;
IF ERROR_NUMBER() = 2627 -- Primary Key violation
BEGIN
PRINT 'Duplicate Rate Change Found';
RETURN @DUPLICATE_RATE_CHANGE;
END
END CATCH;
END;