Oracle 存储过程返回结果集

*过程返回记录集：
CREATE OR REPLACE PACKAGE pkg_test
AS
    TYPE myrctype IS REF CURSOR;
 
    PROCEDURE get (p_id NUMBER, p_rc OUT myrctype);
END pkg_test;
/
 
CREATE OR REPLACE PACKAGE BODY pkg_test
AS
    PROCEDURE get (p_id NUMBER, p_rc OUT myrctype)
    IS
       sqlstr   VARCHAR2 (500);
    BEGIN
       IF p_id = 0 THEN
          OPEN p_rc FOR
             SELECT ID, NAME, sex, address, postcode, birthday
               FROM student;
       ELSE
          sqlstr :=
             'select id,name,sex,address,postcode,birthday
            from student where id=:w_id';
          OPEN p_rc FOR sqlstr USING p_id;
       END IF;
    END get;
END pkg_test;
/
 
函数返回记录集:
建立带ref cursor定义的包和包体及函数：
CREATE OR REPLACE
package pkg_test as
/* 定义ref cursor类型
    不加return类型，为弱类型，允许动态sql查询，
    否则为强类型，无法使用动态sql查询;
*/
   type myrctype is ref cursor; 
  
--函数申明
   function get(intID number) return myrctype;
end pkg_test;
/
  
CREATE OR REPLACE
package body pkg_test as
--函数体
    function get(intID number) return myrctype is
      rc myrctype;  --定义ref cursor变量
      sqlstr varchar2(500);
    begin
      if intID=0 then
         --静态测试，直接用select语句直接返回结果
         open rc for select id,name,sex,address,postcode,birthday from
student;
      else
         --动态sql赋值，用:w_id来申明该变量从外部获得
         sqlstr := 'select id,name,sex,address,postcode,birthday from
student where id=:w_id';
         --动态测试，用sqlstr字符串返回结果，用using关键词传递参数
         open rc for sqlstr using intid;
      end if;
  
      return rc;
    end get;
  
end pkg_test;