重用我有這個表:從SYS_REFCURSOR在Oracle存儲過程中讀取數據,並在Java
CREATE TABLE "QMS_MODEL"."BOOKING" (
"ID" NUMBER (19, 0) CONSTRAINT "QMS_BOOKING_NN_1" NOT NULL ENABLE
,"CALL_TIME" TIMESTAMP (6)
);
然後,我在Oracle中,一個簡單的存儲過程: 1.get記錄從表中 通過OUT參數2.更新上找到的記錄 3.returns一列SYS_REFCURSOR指向找到的記錄:
CREATE OR REPLACE
PROCEDURE GET_BOOKING
(
refCursorValue OUT SYS_REFCURSOR,
bookingId IN QMS_MODEL.booking.id%type
)
AS
bookingResult QMS_MODEL.booking%ROWTYPE;
todayAtNow QMS_MODEL.booking.booking_time%type;
BEGIN
--********************************
--get booking cursor....
--********************************
OPEN refCursorValue FOR
SELECT
bb.*
FROM qms_model.booking bb
WHERE bb.id = bookingId
FOR UPDATE;
--****************************************
--from boking cursor get booking record...
--****************************************
FETCH refCursorValue INTO bookingResult;
--********************************
--update a column on found booking....
--********************************
SELECT SYSDATE into todayAtNow FROM DUAL;
UPDATE qms_model.booking SET
call_time = todayAtNow
WHERE id = bookingResult.id;
/*
after the fetch refCursorValue is not
valid and the client can't use it!
*/
END;
調用此過程中的預約發現 和字段被更新,但最後光標 是無效的,我不能在這個例子中使用它進行其他操作, 我使用光標登錄ID字段
set serveroutput on format wrapped;
DECLARE
REFCURSORVALUE SYS_REFCURSOR;
BOOKINGID NUMBER;
bookingResult QMS_MODEL.booking%ROWTYPE;
BEGIN
BOOKINGID := 184000000084539;
GET_BOOKING(
REFCURSORVALUE,
BOOKINGID
);
FETCH REFCURSORVALUE INTO bookingResult;
DBMS_OUTPUT.PUT_LINE('>>>OUT , cursor fetc,id='|| bookingResult.id);
END;
我預訂在Java中使用模型實體
@Entity
@Table(name = "BOOKING", schema = "QMS_MODEL")
@NamedNativeQueries({
@NamedNativeQuery(name = "booking.callNext.Oracle",
query = "call GET_BOOKING(?,:bookingId)",
callable = true,
resultClass = Booking.class)
})
public class Booking implements Serializable {
..
..
}
...我用NamedNativeQuery得到它:
long bookingID=...some value
Query q = entityMng.createNamedQuery("booking.callNext.Oracle");
q.setParameter("bookingId", bookingID);
List results = q.getResultList();
if (results!=null && !results.isEmpty()) {
Booking eBooking = (Booking) results.get(0);
..
..
..
..i want use some booking data here....
..but i can't because the cursor is closed
}
我的唯一要求是 - 選擇預訂並在同一交易中將其更新到存儲過程中 -從java調用存儲過程並以@Entity-Booking的形式檢索更新的預訂
預先感謝您。
請在創建對象時不要使用引號。它使得它們區分大小寫,並且不會引起麻煩。 – Ben 2012-02-15 11:44:58