创建或替换v/s删除函数并重新创建它

Question

两者有什么区别？在这两种情况下？在此功能上授予的权限会发生什么？在两种情况下都会自动撤销,并且在重新创建时必须再次提供吗？请解释一下.

Answer 1

删除对象时,与其关联的所有内容也会被删除,包括权限.创建或替换不是这样.

SQL> create procedure p1 is
  2  begin
  3      null;
  4  end;
  5  /

Procedure created.

SQL> grant execute on p1 to xyz;

Grant succeeded.

SQL> select * from user_tab_privs_made
  2  /

GRANTEE                        TABLE_NAME                     GRANTOR                        PRIVILEGE                     GRA HIE
------------------------------ ------------------------------ ------------------------------ ---------------------------------------- --- ---
XYZ                            P1                             APC                            EXECUTE                       NO  NO

SQL> create or replace procedure p1 is
  2    n pls_integer;
  3  begin
  4   n := 1;
  5  end;
  6  /

Procedure created.

SQL> select * from user_tab_privs_made
  2  /

GRANTEE                        TABLE_NAME                     GRANTOR                        PRIVILEGE                     GRA HIE
------------------------------ ------------------------------ ------------------------------ ---------------------------------------- --- ---
XYZ                            P1                             APC                            EXECUTE                       NO  NO

SQL> drop procedure p1;

Procedure dropped.

SQL> create or replace procedure p1 (p in out pls_integer) is
  2  begin
  3    p := p+1;
  4  end;
  5  /

Procedure created.

SQL> select * from user_tab_privs_made
  2  /

no rows selected

SQL>