Single sequence for every table

[wiesiek@…]

Hi,
I am a newbie in Django,
but IMHO in database layer design Django does not follow DRY principle.
I do not understand, why Django uses different sequence for every table.
Having single sequence for all tables is much better than having
sequences for different tables regarding
maintenance, sharding, security et.c. I give you and example package,
that can greatly simplify many mentioned tasks.
Just use django_seq as id generator on any django table

CREATE OR REPLACE PACKAGE django_seq IS

FUNCTION NEXTVAL RETURN NUMBER;
FUNCTION CURRVAL RETURN NUMBER;

END django_seq;
/
CREATE OR REPLACE PACKAGE BODY django_seq IS

last_val NUMBER;
shard_no NUMBER;

FUNCTION NEXTVAL RETURN NUMBER IS
BEGIN

SELECT to_number(to_char(mr_inne_seq.nextval)

lpad(shard_no, 4, '0'))

ltrim(to_char(MOD(abs(hsecs), 1000000), '000000'))

INTO last_val
FROM sys.v_$timer;

RETURN last_val;

END;

FUNCTION CURRVAL RETURN NUMBER IS

no_current_value EXCEPTION;
PRAGMA EXCEPTION_INIT(no_current_value, -8002);

BEGIN

IF (last_val IS NULL) THEN

RAISE no_current_value;

END IF;
RETURN last_val;

END CURRVAL;

BEGIN

--- the code below can use database table lookup
shard_no := 5;

END django_seq;
/