ST_GeometryType(g) GeometryType(g)
Returns as a string the name of the geometry type of which the geometry instance g is a member. The name corresponds to one of the instantiable Geometry subclasses.
ST_GeometryType() and GeometryType() are synonyms.
SELECT GeometryType(GeomFromText('POINT(1 1)'));
+------------------------------------------+
| GeometryType(GeomFromText('POINT(1 1)')) |
+------------------------------------------+
| POINT |
+------------------------------------------+
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https://mariadb.com/kb/en/geometrytype/