[postgis-users] Difference between @ and ST_WITHIN/ST_CONTAINS

[Josh Livni]

The @, and other operators such as &&, work on the bounding boxes of 
geometries.  The st_xxx functions additionally do calculations using the 
actual geometries themselves...

  -Josh

Frank Durstewitz wrote:
> Hi,
> can someone please explain, what the difference between
>
> WHERE ST_CONTAINS(b.geom, e.geom)
>
> and
>
> WHERE e.geom @ b.geom
>
> is? (b.geom are (multi-)polygons and e.geom are points)
>
> I expect to get the same results, but with @ i get a few more records...?
>
> TIA, Frank
>
>
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