- 存儲過程返回記錄集: 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;
/
函數返回記錄集:
建立帶ref cursor定義的包和包體及函數:
CREATE OR REPLACE
package pkg_test as
/* 定義ref cursor類型
不加return類型,爲弱類型,允許動態sql查詢,
否則爲強類型,無法使用動態sql查詢;
*/
type myrctype is ref cursor;
--函數申明
function get(intID number) return myrctype;
end pkg_test;
/
CREATE OR REPLACE
package body pkg_test as
--函數體
function get(intID number) return myrctype is
rc myrctype; --定義ref cursor變量
sqlstr varchar2(500);
begin
if intID=0 then
--靜態測試,直接用select語句直接返回結果
open rc for select id,name,sex,address,postcode,birthday from student;
else
--動態sql賦值,用:w_id來申明該變量從外部獲得
sqlstr := 'select id,name,sex,address,postcode,birthday from student where id=:w_id';
--動態測試,用sqlstr字符串返回結果,用using關鍵詞傳遞參數
open rc for sqlstr using intid;
end if;
return rc;
end get;
end pkg_test; - 一個簡單的應用,帶參數的PROCEDURE,隱式的打開CURSOR.
SELECT * FROM EMP --加工資之前
CREATE OR REPLACE PROCEDURE SP_ADD (add IN number) is --add參數接收傳入的工資增幅
--DECLARE
--CURSOR emp_cur IS SELECT * FROM emp;
BEGIN
FOR sal_sum IN (SELECT * FROM emp) LOOP --使用循環遊標隱式打開遊標emp_cur或
--(SELECT * FROM emp)(在FOR循環中不需要聲明此遊標)
--自動從活動集獲取行,然後在處理完所有行時關閉遊標
IF sal_sum.sal > 2500 THEN --逐行進行比較賦值
UPDATE emp SET sal = sal_sum.sal WHERE empno = sal_sum.empno;
ELSIF (sal_sum.sal + add) > 2500 THEN
UPDATE emp SET sal = 2500 WHERE empno = sal_sum.empno;
ELSE
UPDATE emp SET sal = sal_sum.sal + add WHERE empno = sal_sum.empno;
END IF;
END LOOP;
END;
BEGIN
SP_ADD(500); --輸入增資的幅度
END;
SELECT * FROM EMP --加工資之後