explain.depesz.com

PostgreSQL's explain analyze made readable

Result: nqtBI

Settings
# exclusive inclusive rows x rows loops node
1. 9.082 9.386 ↑ 1.0 1 1

CTE Scan on prev_ts prv (cost=11.92..11.95 rows=1 width=33) (actual time=9.386..9.386 rows=1 loops=1)

2.          

CTE next_ts

3. 0.002 8.980 ↑ 1.0 1 1

Limit (cost=0.42..8.28 rows=1 width=12) (actual time=8.979..8.980 rows=1 loops=1)

4. 8.978 8.978 ↑ 1,385.0 1 1

Index Scan using timeslot_location_id_time_status_idx on timeslot ts (cost=0.42..10,888.39 rows=1,385 width=12) (actual time=8.978..8.978 rows=1 loops=1)

  • Index Cond: (location_id = 21)
  • Filter: ((item_category_id = 1) AND (status = ANY ('{PUBLISHED,BOOKED,"MARKED TO DELETE"}'::text[])) AND (now() < ("time" + ('00:01:00'::interval * (duration)::double precision))))
  • Rows Removed by Filter: 9,581
5.          

CTE prev_ts

6. 0.000 9.076 ↑ 1.0 1 1

Limit (cost=0.44..3.34 rows=1 width=16) (actual time=9.076..9.076 rows=1 loops=1)

7.          

Initplan (for Limit)

8. 8.986 8.986 ↑ 1.0 1 1

CTE Scan on next_ts (cost=0.00..0.02 rows=1 width=8) (actual time=8.984..8.986 rows=1 loops=1)

9. 9.074 9.074 ↑ 1,385.0 1 1

Index Scan Backward using timeslot_time_index on timeslot ts_1 (cost=0.42..4,022.80 rows=1,385 width=16) (actual time=9.074..9.074 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. 0.303 0.303 ↑ 1.0 1 1

CTE Scan on next_ts nxt (cost=0.00..0.28 rows=1 width=32) (actual time=0.302..0.303 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=0.001..0.001 rows=1 loops=1)