MySQL 9.1 Release Notes
A MultiSurface is a geometry collection
composed of surface elements. MultiSurface
is a noninstantiable class. Its only instantiable subclass is
MultiPolygon.
MultiSurface
Assertions
Surfaces within a
MultiSurfacehave no interiors that intersect.Surfaces within a
MultiSurfacehave boundaries that intersect at most at a finite number of points.