小编Jee*_*eja的帖子

我写了一个 PL/SQL 函数：-

CREATE OR REPLACE FUNCTION register_driver1(driver_name IN VARCHAR, pass_word IN VARCHAR) RETURN NUMBER AS
sql_stmt VARCHAR2(200);
driver_id NUMBER;
new_view_name VARCHAR(50);
BEGIN

    sql_stmt := 'CREATE USER '||driver_name||' identified by '||pass_word;

    EXECUTE IMMEDIATE sql_stmt;

    sql_stmt := 'grant create session to '||driver_name;

    EXECUTE IMMEDIATE sql_stmt;

    driver_id := driver_ids.nextval;
    new_view_name := 'vehicle_'||driver_name;

    sql_stmt := 'CREATE VIEW '||new_view_name|| ' AS SELECT Model, Seats, reg_no FROM Vehicle WHERE(d_id='||driver_id||')';

    EXECUTE IMMEDIATE sql_stmt;

    sql_stmt := 'CREATE OR REPLACE TRIGGER reg_vehicle 
                 INSTEAD OF INSERT ON '||new_view_name||
               ' …