mysql - 从几何类型表中检索坐标

Question

我用来插入坐标的查询：

INSERT INTO `area` VALUES (PolygonFromText('POLYGON((".$polygon."))'))")

我用来获取坐标的查询：

SELECT CAST(AsText(polygon) AS char) AS p from `area`

What I got back is: POLYGON((40.6524347950336 22.9509570396729,40.6304214047297 22.9454638756104,40.6123102760868 22.9640033043213,40.6113980749889 22.9895808494873,40.6524347950336 22.9509570396729))

有没有更好的方法或另一种方法，也许改变我的查询只得到坐标？