Hi, I made the table smaller for sharing. Now the table has just 1600 rows. The effect still remains. I tried with others tables and other PostGIS versions, I tried even just with tables with POINT features getting similar results.
Thanx, Best You can download the table from here: http://cid-40b8dee7bf5b661f.skydrive.live.com/self.aspx/.Public/data.tgz test3=# explain analyze select count(*) from suelos1 s1, suelos1 s2 where (s1.geom && s2.geom); QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------- Aggregate (cost=1095.91..1095.92 rows=1 width=0) (actual time=2840.187..2840.189 rows=1 loops=1) -> Nested Loop (cost=0.00..1079.87 rows=6416 width=0) (actual time=0.111..2820.408 rows=13808 loops=1) -> Seq Scan on suelos1 s1 (cost=0.00..130.04 rows=1604 width=4597) (actual time=0.009..2.580 rows=1604 loops=1) -> Index Scan using suelos1_geom on suelos1 s2 (cost=0.00..0.58 rows=1 width=4597) (actual time=0.778..1.729 rows=9 loops=1604) Index Cond: (s1.geom && s2.geom) Total runtime: 2840.270 ms (6 rows) test3=# explain analyze select count(*) from suelos1 s1, suelos1 s2 where (st_expand(s1.geom,00) && s2.geom); QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------- Aggregate (cost=1087.92..1087.93 rows=1 width=0) (actual time=212.789..212.790 rows=1 loops=1) -> Nested Loop (cost=0.00..1087.89 rows=13 width=0) (actual time=0.090..189.842 rows=13808 loops=1) -> Seq Scan on suelos1 s1 (cost=0.00..130.04 rows=1604 width=4597) (actual time=0.012..2.632 rows=1604 loops=1) -> Index Scan using suelos1_geom on suelos1 s2 (cost=0.00..0.58 rows=1 width=4597) (actual time=0.043..0.084 rows=9 loops=1604) Index Cond: (st_expand(s1.geom, 0::double precision) && s2.geom) Total runtime: 212.864 ms (6 rows) _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
