oracle 包游标使用-526互联

包游标即在包头声明部分定义游标头，即游标的定义，把实现部分留给包体来完成，调用时可以通过包来调用，这样方便共享游标，实际实现功能类似视图。

示例

包头定义

create or replace package mypackage is
cursor cur_employee(deptno in employee.departmentno%type) return employee%rowtype; --游标的定义一定要包含return returnType
end;

包体定义

create or replace package body mypackage is
cursor cur_employee(deptno in employee.departmentno%type) return employee%rowtype 
is select * from employee where departmentno=deptno;
end;

调用

declare 
  item employee%rowtype;
begin
  if mypackage.cur_employee%isopen then --因为包游标作为共享游标，一定要用完关闭，用前判断是否已打开
    close mypackage.cur_employee;
  end if;
  open mypackage.cur_employee('005');
  loop
    fetch mypackage.cur_employee into  item;
    exit when mypackage.cur_employee%notfound;
    dbms_output.put_line(item.employeename); 
  end loop;
  close mypackage.cur_employee; ---用完关闭
end;