oracle数据库基础教程之32包（子程序重载）

oracle基础教程之32包（子程序重载）

直接上代码吧

--根据员工号或员工姓名获取员工的信息
--根据员工号或员工姓名删除员工的信息
--创建包规范
create or replace package overload_pkg
is
       function get_info(eno number) return emp%rowtype;
       function get_info(name varchar2) return emp%rowtype;
       
       procedure del_emp(eno number);
       procedure del_emp(name varchar2);
end;

--创建包体
create or replace package body overload_pkg
is
       function get_info(eno number) return emp%rowtype
       is
                emp_record  emp%rowtype;
       begin
                select * into emp_record from emp where empno = eno;
                return emp_record;    
       exception
                when no_data_found then
                     raise_application_error(-20020,'不存在此员工！');
       end;
       
       function get_info(name varchar2) return emp%rowtype
       is 
                emp_record  emp%rowtype;
       begin
                select * into emp_record from emp where ename = name;
                return emp_record; 
       exception
                when no_data_found then
                     raise_application_error(-20020,'不存在此员工！');
       end;       
       
       procedure del_emp(eno number)
       is
       begin
                 delete from emp where empno = eno;
                 if sql%notfound then
                    raise_application_error(-20020,'不存在此员工');
                 end if;
       end;
       
       procedure del_emp(name varchar2)
       is
       begin
                 delete from emp where ename = name;
                 if sql%notfound then
                    raise_application_error(-20020,'不存在此员工');
                 end if;
       end;
end;

调用：

--调用
--根据员工号查询员工信息
declare
       emp_record emp%rowtype;
       e_no_emp  exception;
       pragma exception_init(e_no_emp,-20020);
begin
       emp_record:= overload_pkg.get_info(&no);
       dbms_output.put_line('员工号：'||emp_record.empno||'姓名：'||emp_record.ename||'工资：'||emp_record.sal);
exception
       when e_no_emp then
            dbms_output.put_line(sqlerrm);
end;

--根据员工姓名查询员工信息
declare
       emp_record emp%rowtype;
       e_no_emp  exception;
       pragma exception_init(e_no_emp,-20020);
begin
       emp_record:= overload_pkg.get_info('&name');
       dbms_output.put_line('员工号：'||emp_record.empno||'姓名：'||emp_record.ename||'工资：'||emp_record.sal);
exception
       when e_no_emp then
            dbms_output.put_line(sqlerrm);
end;

--根据员工号删除员工信息
declare
       e_no_emp exception;
       pragma exception_init(e_no_emp, -20020);
begin
       overload_pkg.del_emp(&no);
       commit;
exception
       when e_no_emp then
            dbms_output.put_line(sqlerrm);
       rollback;
end;  



--根据员工的姓名删除员工的信息
declare
       e_no_emp exception;
       pragma exception_init(e_no_emp, -20020);
begin
       overload_pkg.del_emp('&name');
       commit;
exception
       when e_no_emp then
            dbms_output.put_line(sqlerrm);
       rollback;
end;