通过phpMyAdmin为mysql添加一个函数

Question

我有以下功能被添加到mysql数据库我已经通过phpMyAdmin尝试它,但它没有给我任何指示是否添加和当我尝试运行该函数时给出错误该函数不存在.我在这里缺少什么？

DELIMITER // 

CREATE FUNCTION GISWithin(pt POINT, mp MULTIPOLYGON) RETURNS INT(1) DETERMINISTIC 
BEGIN 

DECLARE str, xy TEXT; 
DECLARE x, y, p1x, p1y, p2x, p2y, m, xinters DECIMAL(16, 13) DEFAULT 0; 
DECLARE counter INT DEFAULT 0; 
DECLARE p, pb, pe INT DEFAULT 0; 

SELECT MBRWithin(pt, mp) INTO p; 
IF p != 1 OR ISNULL(p) THEN 
RETURN p; 
END IF; 

SELECT X(pt), Y(pt), ASTEXT(mp) INTO x, y, str; 
SET str = REPLACE(str, 'POLYGON((',''); 
SET str = REPLACE(str, '))', ''); 
SET str = CONCAT(str, ','); 

SET pb = 1; 
SET pe = LOCATE(',', str); 
SET xy = SUBSTRING(str, pb, pe - pb); 
SET p = INSTR(xy, ' '); 
SET p1x = SUBSTRING(xy, 1, p - 1); 
SET p1y = SUBSTRING(xy, p + 1); 
SET str = CONCAT(str, xy, ','); 

WHILE pe > 0 DO 
SET xy = SUBSTRING(str, pb, pe - pb); 
SET p = INSTR(xy, ' '); 
SET p2x = SUBSTRING(xy, 1, p - 1); 
SET p2y = SUBSTRING(xy, p + 1); 
IF p1y < p2y THEN SET m = p1y; ELSE SET m = p2y; END IF; 
IF y > m THEN 
IF p1y > p2y THEN SET m = p1y; ELSE SET m = p2y; END IF; 
IF y <= m THEN 
IF p1x > p2x THEN SET m = p1x; ELSE SET m = p2x; END IF; 
IF x <= m THEN 
IF p1y != p2y THEN 
SET xinters = (y - p1y) * (p2x - p1x) / (p2y - p1y) + p1x; 
END IF; 
IF p1x = p2x OR x <= xinters THEN 
SET counter = counter + 1; 
END IF; 
END IF; 
END IF; 
END IF; 
SET p1x = p2x; 
SET p1y = p2y; 
SET pb = pe + 1; 
SET pe = LOCATE(',', str, pb); 
END WHILE; 

RETURN counter % 2; 

END; 

DELIMITER ; 

Answer 1

您已将分隔符设置为//,但最终END语句将终止;,因此可能永远不会创建该函数.

尝试将其更改为:

END//

更新:

phpMyAdmin不尊重或不了解DELIMITER,因为它只是一个MySQL CLI客户端命令.根据这篇文章,phpMyAdmin中有一个文本框来设置分隔符.在那里输入你的//并从你的代码中删除DELIMITER语句.