本节中描述的函数接收两个几何体作为参数，并返回它们之间的定性或定量关系。The functions described in this section take two geometries as arguments and return a qualitative or quantitative relation between them.

MySQL 实现了两套使用 OpenGIS 规范定义的函数名称的函数。一套使用精确的对象形状测试两个几何值之间的关系，另一套使用对象最小外接矩形（MBR）。MySQL implements two sets of functions using function names defined by the OpenGIS specification. One set tests the relationship between two geometry values using precise object shapes, the other set uses object minimum bounding rectangles (MBRs).