Auto increment in Oracle package - oracle

Question

I am trying to use autoincrement on my package without using trigger.. Can someone explain me how I have to use it in my package.. I did this way didnt work its complaining abt variable not being declared or type not assigned.. I saw other autoincrement questions but nobody has used auto increment without trigger on package
PROCEDURE insertExample (
user_id_in IN sample.seq_user_id.nextval,
name_in IN sample.name%TYPE,
age_in IN sample.age%TYPE )
IS
BEGIN
INSERT INTO sample
(seq_user_id.nextval, name, age)
VALUES
(user_id_in, name_in, age_in);
END insertExample;

Answer 1

Are you wanting to allow a custom user_id to be passed in or always use the sequence?
In the first case, you would need something like:
CREATE OR REPLACE PROCEDURE insertexample (
user_id_in in sample.user_id%type,
name_in in sample.name%type,
age_in in sample.age%type
)
IS
BEGIN
insert into sample
(user_id, name, age
)
values (nvl(user_id_in, seq_user_id.nextval), name_in, age_in);
END insertexample;
If you always want to use the sequence (which is probably the right choice), just take out that input parameter and the NVL:
CREATE OR REPLACE PROCEDURE insertexample (
name_in in sample.name%type,
age_in in sample.age%type
)
IS
BEGIN
insert into sample
(user_id, name, age
)
values (seq_user_id.nextval, name_in, age_in);
END insertexample;

Answer 2

You want something like
PROCEDURE insertExample (
name_in IN sample.name%TYPE,
age_in IN sample.age%TYPE )
IS
BEGIN
INSERT INTO sample
(user_id, name, age)
VALUES
(seq_user_id.nextval, name_in, age_in);
END insertExample;

Answer 3

Your not that far away from a working solution:
PROCEDURE insertExample (
name_in IN sample.name%TYPE,
age_in IN sample.age%TYPE )
IS
BEGIN
INSERT INTO sample (user_id, name, age)
VALUES (seq_user_id.nextval, name_in, age_in);
END insertExample;
I'm assuming that the table has at least three columns called user_id, name and age. Furthermore, I'm assuming that you have already created a sequence called seq_user_id (CREATE SEQUENCE seq_user_id START WITH 1 INCREMENT BY 1).
As the user Id is not automatically assigned, it is no longer part of the parameter list.

Answer 4

I would phrase your procedure as a FUNCTION instead, and return the new ID to the caller:
FUNCTION insert_user
(
name_in IN users.name%TYPE,
age_in IN users.age%TYPE
)
RETURN users.id%TYPE
IS
v_id users.id%TYPE;
BEGIN
INSERT INTO users (
user_id,
name,
age
) VALUES (
seq_user_id.nextval,
name_in,
age_in
)
RETURNING
user_id
INTO
v_id
;
RETURN v_id;
END insert_user;
This is generally a more useful pattern for inserts, especially where you may want to subsequently insert child records in other tables.