[ORACLE 10G]utiliser les Prepared Statements

Bonjour,

Je n'arrive pas à exploiter les prepared statements.
Pourvez-vous m'éclairer là dessus ?

J'ai créer un script pl/sql qui permet de retirer tous les privilèges (tables et roles) d'une série de rôles données (dans TAB)

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
DECLARE 
    TYPE cur_typ IS REF CURSOR;
    c cur_typ;
    query_tables VARCHAR2(200) :='select distinct owner || ''.'' || table_name from dba_tab_privs where grantee=:ROLE';
    query_roles VARCHAR2(200) := 'select GRANTED_ROLE from dba_role_privs where grantee=:ROLE';
	role_name VARCHAR2(40);
    table_name VARCHAR2(40);
    granted_role VARCHAR2(40);
	TYPE TYPE_TAB IS VARRAY (20) OF VARCHAR2(40);
	TAB TYPE_TAB := TYPE_TAB('ROLE1','ROLE2');
BEGIN
 
-- For each ROLE defined in TAB --
FOR i IN TAB.FIRST..TAB.LAST
LOOP
	role_name:=TAB(i);
 
	-- Get TABLE names from the current ROLE --
    OPEN c FOR query_tables USING role_name;
    LOOP
        FETCH c INTO table_name;
        EXIT WHEN c%NOTFOUND;
        -- Revoke the current TABLE from the current ROLE --
		dbms_output.PUT_LINE(table_name);
		--EXECUTE IMMEDIATE 'revoke ALL PRIVILEGES on ' || table_name || ' from ' || role_name; 
    END LOOP;
    CLOSE c;
	-- END Get TABLE names from the current ROLE --
 
	-- Get ROLE names from the current ROLE --
	OPEN c FOR query_roles USING role_name;
	LOOP
		FETCH c INTO granted_role;
		EXIT WHEN c%NOTFOUND;
		-- Revoke the current granted ROLE from the ROLE --
		dbms_output.PUT_LINE(granted_role);
		--EXECUTE IMMEDIATE 'revoke '|| granted_role || '  from ' || role_name; 
	END LOOP;
	CLOSE c;
	-- END GetROLE names from the current ROLE --
 
END LOOP;
-- END For each ROLE defined in TAB --
END;
/

Est-ce possible d'y intégrer les prepared statements pour être plus performant ?
J'utilise des flags mais je pense que ce n'est pas encore le top.

Merci d'avance !