Will the query of the MBR function against an indexed column with a geometry type containing points and polygons (GeomCollection type) be slower than the MBR function against an indexed column with a polygon type?
My programmer instincts tell me that it will be slower and I have to use the most descriptive spatial type that I can.
Edit: after reading Denis answer, the real question is:
In MySQL, "Is an indexed column with a geometry type that contains points and polygons actually contains the latter, or comes down to MBR?"
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