Need to find Error in the following code. Following code gives everything in the output irrelevant of the input values

ALTER PROCEDURE Search (@city VARCHAR(15),
                        @srch VARCHAR(15),
                        @date DATE,
                        @zip  INT)
AS
    SELECT *
    FROM   Supplier
    WHERE  ( city = @city
             AND ( CompanyName = @srch
                    OR CompAdd = @srch
                    OR status = @srch
                    OR zip = @zip
                    OR DOJ = @date ) )