explain.depesz.com

PostgreSQL's explain analyze made readable

Result: Y91n

Settings
# exclusive inclusive rows x rows loops node
1. 172.178 162,641.627 ↑ 1.0 1 1

Aggregate (cost=2,494,065.27..2,494,065.28 rows=1 width=32) (actual time=162,641.626..162,641.627 rows=1 loops=1)

2. 24.816 162,469.449 ↓ 4.2 30,066 1

Subquery Scan on q (cost=2,493,487.42..2,494,047.21 rows=7,223 width=44) (actual time=162,176.703..162,469.449 rows=30,066 loops=1)

3. 114,098.408 162,444.633 ↓ 4.2 30,066 1

HashAggregate (cost=2,493,487.42..2,493,974.98 rows=7,223 width=253) (actual time=162,176.690..162,444.633 rows=30,066 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
4.          

CTE boundaries

5. 0.064 0.064 ↑ 1.0 1 1

Index Scan using idx_v_transit_boundaries_code on v_transit_boundaries (cost=0.28..8.30 rows=1 width=75,373) (actual time=0.061..0.064 rows=1 loops=1)

  • Index Cond: (code = ANY ('{LGA_31000}'::text[]))
6. 13,751.270 48,346.225 ↓ 3.9 19,374,368 1

Nested Loop Left Join (cost=40,634.50..2,234,880.09 rows=4,925,696 width=209) (actual time=779.066..48,346.225 rows=19,374,368 loops=1)

7. 14,495.305 34,594.955 ↓ 3.9 19,374,368 1

Hash Left Join (cost=40,634.50..2,136,366.16 rows=4,925,696 width=209) (actual time=778.991..34,594.955 rows=19,374,368 loops=1)

  • Hash Cond: (road_segments.trip_id = road_movements.trip_id)
8. 4,260.654 19,330.391 ↓ 3.9 19,374,368 1

Nested Loop (cost=761.19..2,083,562.80 rows=4,925,696 width=193) (actual time=4.863..19,330.391 rows=19,374,368 loops=1)

9. 363.371 367.463 ↓ 4.2 30,066 1

Bitmap Heap Scan on v_transit_roads (cost=760.62..34,129.40 rows=7,223 width=185) (actual time=4.831..367.463 rows=30,066 loops=1)

  • Recheck Cond: (geometry && '0103000020110F00000100000005000000E17ADC72B5327041CDCCCC56F6E247C1E17ADC72B5327041EC51F818D67B48C185EB216BD1457041EC51F818D67B48C185EB216BD1457041CDCCCC56F6E247C1E17ADC72B5327041CDCCCC56F6E247C1'::geometry)
  • Filter: _st_intersects(geometry, '0103000020110F00000100000005000000E17ADC72B5327041CDCCCC56F6E247C1E17ADC72B5327041EC51F818D67B48C185EB216BD1457041EC51F818D67B48C185EB216BD1457041CDCCCC56F6E247C1E17ADC72B5327041CDCCCC56F6E247C1'::geometry)
  • Rows Removed by Filter: 1
  • Heap Blocks: exact=3969
10. 4.092 4.092 ↓ 1.4 30,067 1

Bitmap Index Scan on v_transit_roads_geometry_geom_idx (cost=0.00..758.81 rows=21,670 width=0) (actual time=4.092..4.092 rows=30,067 loops=1)

  • Index Cond: (geometry && '0103000020110F00000100000005000000E17ADC72B5327041CDCCCC56F6E247C1E17ADC72B5327041EC51F818D67B48C185EB216BD1457041EC51F818D67B48C185EB216BD1457041CDCCCC56F6E247C1E17ADC72B5327041CDCCCC56F6E247C1'::geometry)
11. 14,702.274 14,702.274 ↑ 8.1 644 30,066

Index Only Scan using idx_road_segments_key on road_segments (cost=0.57..231.50 rows=5,224 width=16) (actual time=0.010..0.489 rows=644 loops=30,066)

  • Index Cond: (link_id = v_transit_roads.link_id)
  • Heap Fetches: 0
12. 236.996 769.259 ↑ 1.0 582,725 1

Hash (cost=32,589.25..32,589.25 rows=582,725 width=32) (actual time=769.258..769.259 rows=582,725 loops=1)

  • Buckets: 1048576 Batches: 1 Memory Usage: 44613kB
13. 532.263 532.263 ↑ 1.0 582,725 1

Seq Scan on road_movements (cost=0.00..32,589.25 rows=582,725 width=32) (actual time=0.047..532.263 rows=582,725 loops=1)

14. 0.000 0.000 ↑ 1.0 1 19,374,368

CTE Scan on boundaries (cost=0.00..0.02 rows=1 width=0) (actual time=0.000..0.000 rows=1 loops=19,374,368)

Planning time : 1.918 ms