我正在尝试编写删除客户的 Sybase ASE (15) 存储过程。由于“外键约束违反”，DELETE 可能会失败，在这种情况下，存储过程应该回滚事务并返回。
CREATE PROCEDURE dbo.spumb_deleteCustomer @customertodelete int AS BEGIN
BEGIN TRANSACTION TRX_UMBDELCUSTOMER
DELETE CREDITCARDS WHERE CUSTOMERID = @customertodelete
DELETE CUSTOMER_SELECTION_MAP WHERE CUSTOMERID = @customertodelete
DELETE CUSTOMERS WHERE ID = @customertodelete
SELECT @rcnt = @@ROWCOUNT
IF (@rcnt <> 1) BEGIN
PRINT 'FAILED TO DELETE CUSTOMER'
ROLLBACK TRANSACTION TRX_UMBDELCUSTOMER
RETURN
END
COMMIT TRANSACTION TRX_UMBDELCUSTOMER
END
在游标中运行此 SP 时，执行在第一个无效 DELETE 后中止。如何使光标继续（或者，更确切地说，SP 不会引发错误）？
谢谢，西蒙