oracle不像SQLServer那樣在存儲過程中用Select就可以返回結(jié)果集,而是通過Out型的參數(shù)進(jìn)行結(jié)果集返回的
Oracle不像SQLServer那樣在存儲過程中用Select就可以返回結(jié)果集,而是通過Out型的參數(shù)進(jìn)行結(jié)果集返回的。實(shí)際上是利用REF CURSOR
代碼如下:
–procedure返回記錄集:
———————-聲明一個(gè)Package————–
CREATE OR REPLACE PACKAGE pkg_test
AS
TYPEmyrctypeIS REF CURSOR;
PROCEDURE get_r(p_id NUMBER,p_rc OUT myrctype); –Package中聲明名為get 的Procedure(只有接口沒內(nèi)容)
END pkg_test;
—————–聲明Package Body,即上面Package中的內(nèi)容,包括Procedure get———————
CREATE OR REPLACE PACKAGE BODY pkg_test
AS
PROCEDURE get_r(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’; –w_id是個(gè)參數(shù),
–以下 p_rc是個(gè)REF CURSOR游標(biāo)類型,而且是OUT型參數(shù),即可返回一個(gè)記錄集了。USING p_id就是替換上面SQL中:w_id值拉:)
OPEN p_rc FOR sqlstr USING p_id;
END IF;
END get;
END pkg_test;
–function返回記錄集的例子,原理和上面相同,而是用function的return值來返回記錄集。
函數(shù)返回記錄集:
建立帶ref cursor定義的包和包體及函數(shù):
代碼如下:
CREATE OR REPLACE
package pkg_test as
type myrctype is ref cursor;
function get_r(intID number) return myrctype;
end pkg_test;
/
CREATE OR REPLACE
package body pkg_test as
–函數(shù)體
function get_r(intID number) return myrctype is
rc myrctype; –定義ref cursor變量
sqlstr varchar2(500);
begin
if intID=0 then
–靜態(tài)測試,直接用select語句直接返回結(jié)果
open rc for select id,name,sex,address,postcode,birthday from student;
else
–動(dòng)態(tài)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(dòng)態(tài)測試,用sqlstr字符串返回結(jié)果,用using關(guān)鍵詞傳遞參數(shù)
open rc for sqlstr using intid;
end if;
return rc;
end get;
end pkg_test;