Tommy Pham wrote:
> 
> As for spatial data types, I've never find much use for non scientific
> related.  (example) If using point as a PK, if MySQL stores it the
> same way as PostgreSQL which is 16 bytes, how is that any different -
> performance wise - than using UUID and storing it as binary(16) for
> MySQL or uniqueidentifier (16 bytes) for PostgreSQL?
> 

it's all about the indexing (R-Tree)

http://en.wikipedia.org/wiki/R-tree




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