Pre-General Availability Draft: 2018-03-17
GeomCollection is a geometry that is a
collection of zero or more geometries of any class.
GeomCollection type name was added in
GeometryCollection are synonymous, with
GeomCollection the preferred type name.
Prior to MySQL 8.0.11,
is the only permitted type name.
All the elements in a geometry collection must be in the same
spatial reference system (that is, in the same coordinate
system). There are no other constraints on the elements of a
geometry collection, although the subclasses of
GeomCollection described in the following
sections may restrict membership. Restrictions may be based
Element type (for example, a
MultiPointmay contain only
Constraints on the degree of spatial overlap between elements