explain.depesz.com

PostgreSQL's explain analyze made readable

Result: 2lTp

Settings
# exclusive inclusive rows x rows loops node
1. 20,666.369 180,337.938 ↑ 1.0 1 1

Aggregate (cost=21,792.22..21,792.23 rows=1 width=32) (actual time=180,337.937..180,337.938 rows=1 loops=1)

2. 2,608.091 159,671.569 ↓ 731.1 3,819,120 1

Subquery Scan on q (cost=1,214.40..21,779.16 rows=5,224 width=132) (actual time=6.310..159,671.569 rows=3,819,120 loops=1)

3. 1,318.782 157,063.478 ↓ 731.1 3,819,120 1

Nested Loop (cost=1,214.40..21,726.92 rows=5,224 width=108) (actual time=6.294..157,063.478 rows=3,819,120 loops=1)

4.          

CTE boundaries

5. 0.000 0.000 ↓ 0.0 0

Seq Scan on v_transit_boundaries (cost=0.00..910.46 rows=3,346 width=75,373) (never executed)

6. 34.725 40.232 ↓ 417.0 417 1

GroupAggregate (cost=174.88..174.98 rows=1 width=246) (actual time=4.377..40.232 rows=417 loops=1)

  • Group Key: v_transit_roads.link_id, v_transit_roads.street_name, v_transit_roads.road_speed, v_transit_roads.road_rank, v_transit_roads.truck, v_transit_roads.surface, v_transit_roads.road_km, v_transit_roads.geometry
7. 1.547 5.507 ↓ 417.0 417 1

Sort (cost=174.88..174.89 rows=1 width=206) (actual time=4.325..5.507 rows=417 loops=1)

  • Sort Key: v_transit_roads.link_id, v_transit_roads.street_name, v_transit_roads.road_speed, v_transit_roads.road_rank, v_transit_roads.truck, v_transit_roads.surface, v_transit_roads.road_km, v_transit_roads.geometry
  • Sort Method: quicksort Memory: 145kB
8. 0.268 3.960 ↓ 417.0 417 1

Nested Loop Left Join (cost=4.73..174.87 rows=1 width=206) (actual time=0.361..3.960 rows=417 loops=1)

  • Join Filter: NULL::boolean
9. 3.512 3.692 ↓ 417.0 417 1

Bitmap Heap Scan on v_transit_roads (cost=4.73..174.86 rows=1 width=206) (actual time=0.356..3.692 rows=417 loops=1)

  • Recheck Cond: ((street_name)::text = ANY ('{"Gore Hwy"}'::text[]))
  • Filter: ((geometry && '0103000020110F00000100000005000000EC511814C3F26F41CDCCCC56F6E247C1EC511814C3F26F410AD723DBB51449C13D0A977A991F70410AD723DBB51449C13D0A977A991F7041CDCCCC56F6E247C1EC511814C3F26F41CDCCCC56F6E247C1'::geometry) AND _st_intersects(geometry, '0103000020110F00000100000005000000EC511814C3F26F41CDCCCC56F6E247C1EC511814C3F26F410AD723DBB51449C13D0A977A991F70410AD723DBB51449C13D0A977A991F7041CDCCCC56F6E247C1EC511814C3F26F41CDCCCC56F6E247C1'::geometry))
  • Rows Removed by Filter: 32
  • Heap Blocks: exact=119
10. 0.180 0.180 ↓ 11.0 449 1

Bitmap Index Scan on idx_v_transit_roads_street_name (cost=0.00..4.73 rows=41 width=0) (actual time=0.180..0.180 rows=449 loops=1)

  • Index Cond: ((street_name)::text = ANY ('{"Gore Hwy"}'::text[]))
11. 0.000 0.000 ↓ 0.0 0 417

Result (cost=0.00..0.00 rows=0 width=0) (actual time=0.000..0.000 rows=0 loops=417)

  • One-Time Filter: false
12. 29,330.529 155,704.464 ↓ 1.8 9,159 417

Bitmap Heap Scan on road_segments s (cost=129.06..20,589.23 rows=5,224 width=32) (actual time=304.834..373.392 rows=9,159 loops=417)

  • Recheck Cond: (link_id = ((v_transit_roads.link_id)::integer))
  • Heap Blocks: exact=3819039
13. 126,373.935 126,373.935 ↓ 1.8 9,159 417

Bitmap Index Scan on idx_road_segments_link_id (cost=0.00..127.76 rows=5,224 width=0) (actual time=303.055..303.055 rows=9,159 loops=417)

  • Index Cond: (link_id = ((v_transit_roads.link_id)::integer))
Planning time : 4.846 ms