[postgis-users] points in polygon

[Young Kim]

here are explain outputs.

1st line is "aggregate" because i'm just counting number of rows.

8K points seem nothing to me.
People don't do spatial analysis on 8K+ points?

-------------------------------------

WHERE (polygon.fips = '0644000') AND point.the_geom &&
polygon.the_geom AND distance(polygon.the_geom, point.the_geom) <
0.00000001;

Aggregate  (cost=9.09..9.10 rows=1 width=4) (actual
time=32617.877..32617.877 rows=1 loops=1)
  ->  Nested Loop  (cost=0.00..9.04 rows=17 width=4) (actual
time=960.179..32615.023 rows=3248 loops=1)
        Join Filter: (distance("outer".the_geom, "inner".the_geom) <
1e-08::double precision)
        ->  Index Scan using idx_polygon_fips on polygon 
(cost=0.00..3.01 rows=1 width=9414) (actual time=0.012..0.015 rows=1
loops=1)
              Index Cond: ((fips)::text = '0644000'::text)
        ->  Index Scan using idx_point_the_geom on point 
(cost=0.00..6.01 rows=1 width=25) (actual time=62.287..17938.112
rows=7050 loops=1)
              Index Cond: (point.the_geom && "outer".the_geom)
              Filter: (point.the_geom && "outer".the_geom)
Total runtime: 32617.945 ms

-------------------------------------

WHERE (polygon.fips = '0644000') AND distance(polygon.the_geom,
point.the_geom) < 0.00000001;

Aggregate  (cost=1060.81..1060.82 rows=1 width=4) (actual
time=18605.436..18605.437 rows=1 loops=1)
  ->  Nested Loop  (cost=0.00..1053.59 rows=2888 width=4) (actual
time=10.252..18602.620 rows=3248 loops=1)
        Join Filter: (distance("outer".the_geom, "inner".the_geom) <
1e-08::double precision)
        ->  Index Scan using idx_polygon_fips on polygon 
(cost=0.00..3.01 rows=1 width=9414) (actual time=0.016..0.020 rows=1
loops=1)
              Index Cond: ((fips)::text = '0644000'::text)
        ->  Seq Scan on point  (cost=0.00..920.63 rows=8663 width=25)
(actual time=3.068..26.086 rows=8663 loops=1)
Total runtime: 18605.496 ms

-------------------------------------

WHERE (polygon.fips = '0644000') AND point.the_geom &&
polygon.the_geom AND CONTAINS(polygon.the_geom, point.the_geom);

Aggregate  (cost=9.09..9.10 rows=1 width=4) (actual
time=164835.027..164835.027 rows=1 loops=1)
  ->  Nested Loop  (cost=0.00..9.04 rows=17 width=4) (actual
time=4182.576..164829.831 rows=3248 loops=1)
        Join Filter: contains("outer".the_geom, "inner".the_geom)
        ->  Index Scan using idx_polygon_fips on polygon 
(cost=0.00..3.01 rows=1 width=9414) (actual time=0.016..0.020 rows=1
loops=1)
              Index Cond: ((fips)::text = '0644000'::text)
        ->  Index Scan using idx_point_the_geom on point 
(cost=0.00..6.01 rows=1 width=25) (actual time=62.540..18306.731
rows=7050 loops=1)
              Index Cond: (point.the_geom && "outer".the_geom)
              Filter: (point.the_geom && "outer".the_geom)
Total runtime: 164835.099 ms

-------------------------------------

WHERE (polygon.fips = '0644000') AND CONTAINS(polygon.the_geom, point.the_geom);

Aggregate  (cost=1039.15..1039.16 rows=1 width=4) (actual
time=146143.486..146143.487 rows=1 loops=1)
  ->  Nested Loop  (cost=0.00..1031.93 rows=2888 width=4) (actual
time=64.431..146139.232 rows=3248 loops=1)
        Join Filter: contains("outer".the_geom, "inner".the_geom)
        ->  Index Scan using idx_polygon_fips on polygon 
(cost=0.00..3.01 rows=1 width=9414) (actual time=0.016..0.021 rows=1
loops=1)
              Index Cond: ((fips)::text = '0644000'::text)
        ->  Seq Scan on point  (cost=0.00..920.63 rows=8663 width=25)
(actual time=0.283..38.307 rows=8663 loops=1)
Total runtime: 146143.551 ms