所以我尝试通过游标和 callproc() 使用存储过程,但总是收到错误:
OperationalError: (1305, 'PROCEDURE myapp.LatLonDistance does not exist')
这是在我的应用程序中引发错误的代码块:
cursor = connection.cursor()
result = cursor.callproc("myapp.LatLonDistance", (lat1, lon1, lat2, lon2))
cursor.close()
这是一个可以在数据库上运行的直接查询,效果很好:
SELECT id,myapp.LatLonDistance(lat1, lon1, lat2, lon2) AS distance FROM myapp.users_userprofile;
这是我用来将存储过程写入数据库的脚本:
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 数据库。有什么想法吗?
最佳答案
由于这是一个函数,而不是实际上的存储过程,因此您应该能够使用 cursor.execute
调用它:
cursor = connection.cursor()
result = cursor.execute("SELECT id,myapp.LatLonDistance(%s, %s, %s, %s) AS distance FROM myapp.users_userprofile", (lat1, lon1, lat2, lon2))
cursor.close()
关于python - 为什么在 Django 中使用 callproc() 时出现 PROCEDURE 不存在?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/4208807/