如何检查从多个表中删除所有行的存储过程是否成功？

Question

I want a stored procedure that does the equivalent of the following

CREATE PROCEDURE Reset
AS
BEGIN
   DELETE * FROM SomeTable; 
   DELETE * FROM SomeOtherTable;
END

and also returns some indicator of success or failure. How would I do that? Only way I can think of is pre-calculating the number of rows that should be affected, but that seems so shoddy.

Answer 1

The following will produce a success/failure indicator based on the question, 'did the table reset complete without failure?'. It's wrapped in a transaction so that both deletes happen or none happen, which keeps your data clean.

BEGIN TRY
    BEGIN TRANSACTION;
       DELETE FROM SomeTable; 
       DELETE FROM SomeOtherTable;
    COMMIT TRANSACTION;
    -- success indicator
    SELECT 1 AS Result
END TRY
BEGIN CATCH
    IF @@TRANCOUNT > 0
    ROLLBACK TRANSACTION;
    -- failure indicator
    SELECT 0 AS Result
END CATCH