[postgis-users] The operator && is not overlapsoperatorbasedonthe OGC SF SQL

David Blasby dblasby at gmail.com
Wed Aug 18 12:03:49 PDT 2004

> Anyway, I also found in docs the other operators like &<, &>,... which I do
> not understand especiallyt what means left (e.g. from center of masses, from
> the most left bbox point,...), right and how one can use them....
> Are they using index?

I would recommend that you do not use these operators!!!  They're
there because the indexing mechanism requires them to be there.
You can think of them as  "<", "<=", "=", ">=", ">".  They're also
based on bounding boxes.

"If you use them, you'll go blind!"


More information about the postgis-users mailing list