explain.depesz.com

PostgreSQL's explain analyze made readable

Result: Ug9g

Settings
# exclusive inclusive rows x rows loops node
1. 3.755 3.815 ↑ 1.0 1 1

CTE Scan on prev_ts prv (cost=10.46..10.48 rows=1 width=33) (actual time=3.814..3.815 rows=1 loops=1)

2.          

CTE next_ts

3. 0.002 3.691 ↑ 1.0 1 1

Limit (cost=0.42..6.95 rows=1 width=12) (actual time=3.690..3.691 rows=1 loops=1)

4. 3.689 3.689 ↑ 1,449.0 1 1

Index Scan using timeslot_location_id_time_status_idx on timeslot ts (cost=0.42..9,471.10 rows=1,449 width=12) (actual time=3.689..3.689 rows=1 loops=1)

  • Index Cond: (location_id = 21)
  • Filter: (now() < ("time" + ('00:01:00'::interval * (duration)::double precision)))
  • Rows Removed by Filter: 3,970
5.          

CTE prev_ts

6. 0.000 3.750 ↑ 1.0 1 1

Limit (cost=0.44..3.21 rows=1 width=16) (actual time=3.749..3.750 rows=1 loops=1)

7.          

Initplan (for Limit)

8. 3.695 3.695 ↑ 1.0 1 1

CTE Scan on next_ts (cost=0.00..0.02 rows=1 width=8) (actual time=3.693..3.695 rows=1 loops=1)

9. 3.748 3.748 ↑ 1,449.0 1 1

Index Scan Backward using timeslot_time_index on timeslot ts_1 (cost=0.42..4,009.58 rows=1,449 width=16) (actual time=3.748..3.748 rows=1 loops=1)

  • Index Cond: ("time" < $1)
  • Filter: ((location_id = 21) AND (item_category_id = 1) AND (status = ANY ('{PUBLISHED,BOOKED,"MARKED TO DELETE"}'::text[])))
  • Rows Removed by Filter: 32
10.          

Initplan (for CTE Scan)

11. 0.059 0.059 ↑ 1.0 1 1

CTE Scan on next_ts nxt (cost=0.00..0.28 rows=1 width=32) (actual time=0.058..0.059 rows=1 loops=1)

12. 0.001 0.001 ↑ 1.0 1 1

CTE Scan on next_ts next_ts_1 (cost=0.00..0.02 rows=1 width=8) (actual time=0.000..0.001 rows=1 loops=1)