oracle 存儲過程的基本語法
1.基本結構
CREATE OR REPLACE PROCEDURE 存儲過程名字
(
參數1 IN NUMBER,
參數2 IN NUMBER
) IS
變量1 INTEGER :=0;
變量2 DATE;
BEGIN
END 存儲過程名字
2.SELECT INTO STATEMENT
將select查詢的結果存入到變量中,可以同時將多個列存儲多個變量中,必須有一條
記錄,否則拋出異常(如果沒有記錄拋出NO_DATA_FOUND)
例子:
BEGIN
SELECT col1,col2 into 變量1,變量2 FROM typestruct where xxx;
EXCEPTION
WHEN NO_DATA_FOUND THEN
xxxx;
END;
...
3.IF 判斷
IF V_TEST=1 THEN
BEGIN
do something
END;
END IF;
4.while 循環
WHILE V_TEST=1 LOOP
BEGIN
XXXX
END;
END LOOP;
5.變量賦值
V_TEST := 123;
6.用for in 使用cursor
...
IS
CURSOR cur IS SELECT * FROM xxx;
BEGIN
FOR cur_result in cur LOOP
BEGIN
V_SUM :=cur_result.列名1+cur_result.列名2
END;
END LOOP;
END;
7.帶參數的cursor
CURSOR C_USER(C_ID NUMBER) IS SELECT NAME FROM USER WHERE TYPEID=C_ID;
OPEN C_USER(變量值);
LOOP
FETCH C_USER INTO V_NAME;
EXIT FETCH C_USER%NOTFOUND;
do something
END LOOP;
CLOSE C_USER;
8.用pl/sql developer debug
連接數據庫後建立一個Test WINDOW
在窗口輸入調用SP的代碼,F9開始debug,CTRL+N單步調試
關於oracle存儲過程的若干問題備忘
select a.appname from appinfo as a;-- 錯誤
select af.keynode from APPFOUNDATION af where af.appid=aid and af.foundationid=fid;-- 沒有into,編譯報錯,提示:Compilation
Error: PLS-00428: an INTO clause is expected in this SELECT statement
select af.keynode into kn from APPFOUNDATION af where af.appid=appid and af.foundationid=foundationid;-- 運行階段報錯,提示
ORA-01422:exact fetch returns more than requested number of rows
id varchar2(50) primary key not null,
vcount number(8) not null,
bid varchar2(50) not null -- 外鍵
);
fcount:=0;
end if;
new HibernateCallback() {
public Object doInHibernate(Session session)
throws HibernateException, SQLException {
CallableStatement cs = session
.connection()
.prepareCall("{call modifyapppnumber_remain(?)}");
cs.setString(1, foundationid);
cs.execute();
return null;
}
});