IF EXISTS (SELECT * FROM SYSOBJECTS WHERE name='my_sp_test' AND TYPE='P') BEGIN
  DROP PROCEDURE my_sp_test;
END;
GO
create procedure my_sp_test @i int, @outstr varchar(100) out as
begin try
  declare @j int;
  if @i<10 begin
   set @outstr = 'system exception.';
   set @j = 10/0; -- 因为被除数为0,所以这里将会抛出一个系统的异常
  end
  else begin
   set @j = @i;
   set @outstr = 'customer exception';
   -- 抛出自定义的异常,在最后的catch块中统一处理异常
   RAISERROR (66666, -- Message id.
      16, -- Severity,
      1 -- State,
      ) ;  
  end;
end try
begin catch 
  if @@ERROR=66666 begin -- 通过@@ERROR的值来判断是否是自定义的异常
    set @outstr = @outstr + '---------------- customer exception';
  end;
  return;
end catch;
go
 

DECLARE @OUTSTR11 VARCHAR(100);
exec dbo.my_sp_test 12,@OUTSTR11 out
print @OUTSTR11;