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https://dev.mysql.com/doc/refman/8.0/en/gis-geometrycollection-property-functions.html
Unless otherwise specified, functions in this section handle their geometry arguments as follows: If any argument is NULL or any geometry argument is an empty geometry, the return value is NULL. If any geometry argument is not a syntactically ...
https://dev.mysql.com/doc/refman/8.0/en/gis-class-geometrycollection.html
A GeomCollection is a geometry that is a collection of zero or more geometries of any class. GeomCollection and GeometryCollection are synonymous, with GeomCollection the preferred type name. All the elements in a geometry collection must be in the ...
https://dev.mysql.com/doc/refman/8.0/en/cast-functions.html
Table 14.15 Cast Functions and Operators Name Description Deprecated BINARY Cast a string to a binary string 8.0.27 CAST() Cast a value as a certain type CONVERT() Cast a value as a certain type Cast functions and operators enable conversion of ...
https://dev.mysql.com/doc/refman/8.0/en/gis-mysql-specific-functions.html
MySQL provides a set of useful nonstandard functions for creating geometry values. The functions described in this section are MySQL extensions to the OpenGIS specification. These functions produce geometry objects from either WKB values or ...
https://dev.mysql.com/doc/refman/8.0/en/gis-format-conversion-functions.html
MySQL supports the functions listed in this section for converting geometry values from internal geometry format to WKT or WKB format, or for swapping the order of X and Y coordinates. There are also functions to convert a string from WKT or WKB ...
https://dev.mysql.com/doc/refman/8.0/en/gis-wkt-functions.html
These functions take as arguments a Well-Known Text (WKT) representation and, optionally, a spatial reference system identifier (SRID). For a description of WKT format, see Well-Known Text (WKT) Format. Functions in this section detect arguments in ...
https://dev.mysql.com/doc/refman/8.0/en/gis-data-formats.html
Two standard spatial data formats are used to represent geometry objects in queries: Well-Known Text (WKT) format Well-Known Binary (WKB) format Internally, MySQL stores geometry values in a format that is not identical to either WKT or WKB format.
https://dev.mysql.com/doc/refman/8.0/en/gis-geometry-class-hierarchy.html
The geometry classes define a hierarchy as follows: Geometry (noninstantiable) Point (instantiable) Curve (noninstantiable) LineString (instantiable) Line LinearRing Surface (noninstantiable) Polygon (instantiable) GeometryCollection (instantiable) ...
https://dev.mysql.com/doc/refman/8.0/en/spatial-type-overview.html
MySQL has spatial data types that correspond to OpenGIS classes. The basis for these types is described in Section 13.4.2, “The OpenGIS Geometry Model”. Some spatial data types hold single geometry values: GEOMETRY POINT LINESTRING POLYGON ...
https://dev.mysql.com/doc/refman/8.0/en/populating-spatial-columns.html
After you have created spatial columns, you can populate them with spatial data. Values should be stored in internal geometry format, but you can convert them to that format from either Well-Known Text (WKT) or Well-Known Binary (WKB) format. For ...