The functions described in this section take two geometries as arguments and return a qualitative or quantitative relation between them.本节中描述的函数将两个几何图形作为参数，并返回它们之间的定性或定量关系。

MySQL implements two sets of functions using function names defined by the OpenGIS specification. MySQL使用OpenGIS规范定义的函数名实现了两组函数。One set tests the relationship between two geometry values using precise object shapes, the other set uses object minimum bounding rectangles (MBRs).一组使用精确的对象形状测试两个几何值之间的关系，另一组使用对象最小边界矩形（MBR)。