MySQL will implement a synonym for the GIS GeometryCollection type (GeomCollection) and also for the GIS NumInteriorRings function (NumInteriorRing). Rationale --------- Support for the GeomCollection type and the NumInterioRing function is required so that MySQL can claim compliance with OpenGIS; see WL#2377 for full details.
Syntax ------ 1) MySQL has implemented a GeometryCollection type, or class. The OpenGIS specification also calls this the GeomCollection type. For compatibility with the standard, MySQL must implement: GeomCollection -- GeomCollection is a synonym for GeometryCollection. No other changes need to be made. 2) MySQL has implemented a NumInteriorRings function, which takes one argument -- a polygon value -- and returns an integer representing the number of interior rings included in the polygon. NumInteriorRings is either a typo or taken from a too-early version of the OpenGIS specification, which always calls this the NumInteriorRing function. For compatibility with the standard, MySQL must implement: NumInteriorRing(polygon_value) -- NumInteriorRing is a synonym for NumInteriorRings. No other changes need to be made.