[postgis-users] Speed up query
mgheorghiu at chpmail.com
Wed Oct 19 09:21:02 PDT 2011
I have a query that places points in polygons:
insert into results (
select a.point_id, b.polygon_id
from points a, polygons b
where st_contains(ST_GeomFromWKB(ST_AsBinary(b.geog),4326),ST_GeomFromWKB(ST_AsBinary(a.geog),4326)) = 't'
There are ~1M points and ~300k polygons. There are geo indexes on the geog columns of both tables.
What changes would make the query faster?
Thank you very much.
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