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所以我想通過光標和callproc(使用存儲過程),但我總是得到錯誤:爲什麼在Django中使用callproc()時,PROCEDURE不存在?
OperationalError: (1305, 'PROCEDURE myapp.LatLonDistance does not exist')
這裏的代碼拋出的錯誤我的應用程序塊:
cursor = connection.cursor()
result = cursor.callproc("myapp.LatLonDistance", (lat1, lon1, lat2, lon2))
cursor.close()
而這裏的直接查詢,我可以在數據庫運行工作得很好:
SELECT id,myapp.LatLonDistance(lat1, lon1, lat2, lon2) AS distance FROM myapp.users_userprofile;
這裏是我用來存儲過程寫入數據庫腳本:
delimiter //
CREATE FUNCTION airrun.LatLonDistance (lat1 double, lon1 double, lat2 double, lon2 double)
RETURNS double
DETERMINISTIC
READS SQL DATA
BEGIN
DECLARE theta double;
DECLARE dist double;
DECLARE miles double;
SET theta = lon1 - lon2;
SET dist = SIN(RADIANS(lat1)) * SIN(RADIANS(lat2)) + COS(RADIANS(lat1)) * COS(RADIANS(lat2)) * COS(RADIANS(theta));
SET dist = ACOS(dist);
SET dist = DEGREES(dist);
SET miles = dist * 60 * 1.1515;
RETURN miles;
END
//
delimiter ;
使用MySQL數據庫。有什麼想法嗎?
難道不是這樣認爲,儘管功能在MySQL的選擇過程被稱爲。上面的SQL是一個函數,而不是一個過程? – Raz 2010-11-17 20:46:44
這完全有可能,我不是一個SQL大師。那麼實現這一目標的另一種方式是什麼? – 2010-11-17 20:58:07
將其重寫爲存儲過程。 CALL sytnax應該可以工作。見http://dev.mysql.com/doc/refman/5.0/en/create-procedure.html – Raz 2010-11-17 21:00:35