Common use of Sequence in Package

Question

Hi,
I need to get the NEXTVAL from a sequence and i have to pass that to many packages inside of a package.
If i write SELECT seq.nexval into v_varil from dual; means the value wont change sequentially.
How can i get the NEXTVAL sequentialy and declare the SELECT stmt commonly.
Can anyone help me in this.
Thanks
Radha K

Answer 1

Could not understand your question, please be more specific,
Anyway I have tried to answer it with 2 different assumptions with a common understanding that you don't want to code "SELECT seq.nexval into v_varil from dual;" every time you want to use the sequence instead want to have one common declaration for it so that you can reuse.
Assumption1.
You want same value of the sequence to be available in the package for a single oracle session.
Create a function say get_seq_value return number in the package spec and define it in the body as follows
then call this package in the initialization section of the package as follows
CREATE OR REPLACE PACKAGE BODY abc_pkg
g_seq IS NUMBER;
FUNCTION get_seq_value return number
IS
v_varil IS NUMBER;
BEGIN
SELECT seq.nexval into v_varil from dual;
RETURN v_varil;
END;
--here you will have all you internal package and procedures and functons.....
BEGIN
g_seq := get_seq_value;
END abc_pkg;
You can use global variable g_seq throughout this main package elements.
Assumption2.
You want different value of the sequence based on need purpose in the package but don't want to code the select statement, in this case just call the function get_seq_value whereever you need it in the package.
Thanks
SP