MySQL has data types that correspond to OpenGIS classes. Some of these types hold single geometry values:
GEOMETRY can store geometry values of any
type. The other single-value types (
restrict their values to a particular geometry type.
The other data types hold collections of values:
GEOMETRYCOLLECTION can store a collection of
objects of any type. The other collection types
GEOMETRYCOLLECTION) restrict collection
members to those having a particular geometry type.
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