On 7 Srpen 2012, 14:22, Stefan Keller wrote:
> Your proposal lacks the requirement that it's the same building from
> where pharmacies and schools are reachable.
> But I think about.
I don't know the dataset so I've expected the osm_id to identify the
building - then the intersect should work as AND for the conditions.
And I see I've forgot to include the 'is building' condition, so it should
be like this:
SELECT b.osm_id FROM osm_poi AS p, osm_polygon b
WHERE p.tags @> hstore('amenity','pharmacy')
AND b.tags @> hstore('building','yes')
AND ST_DWithin(b.way,p.way,1000)
INTERSECT
SELECT b.osm_id FROM osm_poi AS p, osm_polygon b
WHERE p.tags @> hstore('amenity','school')
AND b.tags @> hstore('building','yes')
AND ST_DWithin(b.way,p.way,1000)
Tomas
--
Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance
