Pl sql procedure to retrieve user details based on the input

Question

hi,
I am looking for an example which will retrieve the data based on what he requests. I mean: the user types in an request_name, the procedure will check if the request_name already exists. If yes, then it will retrieve the request_name and other columns from the table R. Else it will create a new request by adding request_name and other details to the table.
hope this is clear some1 could help me
thanks

Answer 1

If defaults are set for the request table fields and you can get by inserting only the request_name field, perhaps something like the below would work?
T_REQUEST is the table, REQUEST_NAME is the field you mentioned. If the function finds the record, it returns it as a record. If it doesn't, it inserts a blank record with REQUEST_NAME populated:
CREATE OR REPLACE FUNCTION REQUEST_LOOKUP
( V_REQUEST_NAME IN T_REQUEST.REQUEST_NAME%TYPE )
RETURN T_REQUEST%ROWTYPE
AS
    R_REQUEST T_REQUEST%ROWTYPE;
    CURSOR C_REQUEST IS
        SELECT *
        FROM T_REQUEST
     WHERE REQUEST_NAME = V_REQUEST_NAME;
BEGIN
    OPEN C_REQUEST;
        IF C_REQUEST%NOTFOUND
        THEN
            INSERT INTO T_REQUEST (REQUEST_NAME)
            VALUES (V_REQUEST_NAME);
     ELSE
            FETCH C_REQUEST INTO R_REQUEST;
            RETURN R_REQUEST;
     END IF;
    CLOSE C_REQUEST;
END REQUEST_LOOKUP;