从函数返回null时，SQL Server返回1行

Question

I have an alert service which triggers when a SQL statement returns more than one row. Select statements from a view is added to this alert service.

Since I am calling a function from a view, it always returns a row, even if it is null. Is there any way to return 0 rows affected (when function returns null)?

Mappings
-------------------------
NULL

(1 row(s) affected)

I want this to be

Mappings
-------------------------

(0 row(s) affected)

Answer 1

选择[dbo] .GET_PRODUCT_MAPPINGS（）作为映射，其中[dbo] .GET_PRODUCT_MAPPINGS（）不为空。