MySQL Reference Manual for version 4.0.18.

[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

17.5.3.2 Spatial Operators

OpenGIS proposes a number of other functions that can produce geometries. They are designed to implement Spatial Operators.

These functions are not implemented in MySQL. They may appear in future releases.

Intersection(g1,g2)
Returns a geometry that represents the point set intersection of the geometry values g1 with g2.

Union(g1,g2)
Returns a geometry that represents the point set union of the geometry values g1 and g2.

Difference(g1,g2)
Returns a geometry that represents the point set difference of the geometry value g1 with g2.

SymDifference(g1,g2)
Returns a geometry that represents the point set symmetric difference of the geometry value g1 with g2.

Buffer(g,d)
Returns a geometry that represents all points whose distance from the geometry value g is less than or equal to a distance of d.

ConvexHull(g)
Returns a geometry that represents the convex hull of the geometry value g.



This document was generated by rdg (Feb 25 2004) using texi2html