explain.depesz.com

PostgreSQL's explain analyze made readable

Result: gSFp : DEV -> indice no campo "supports_takeout" e "supports_delivery" e "supports_dark_kitchen" e "channels"-> order by com o campo "distance"

Settings
# exclusive inclusive rows x rows loops node
1. 0.002 0.298 ↓ 0.0 0 1

Limit (cost=102.45..102.45 rows=2 width=551) (actual time=0.298..0.298 rows=0 loops=1)

2. 0.010 0.296 ↓ 0.0 0 1

Sort (cost=102.45..102.45 rows=2 width=551) (actual time=0.295..0.296 rows=0 loops=1)

  • Sort Key: t2.distance, t2.score DESC, t2.merchant_short_id
  • Sort Method: quicksort Memory: 25kB
3. 0.001 0.286 ↓ 0.0 0 1

Subquery Scan on t2 (cost=100.97..102.44 rows=2 width=551) (actual time=0.285..0.286 rows=0 loops=1)

  • Filter: (t2.group_rn <= 1)
4. 0.003 0.285 ↓ 0.0 0 1

WindowAgg (cost=100.97..101.82 rows=6 width=500) (actual time=0.284..0.285 rows=0 loops=1)

5. 0.009 0.282 ↓ 0.0 0 1

Sort (cost=100.97..100.98 rows=6 width=616) (actual time=0.282..0.282 rows=0 loops=1)

  • Sort Key: merc.group_id, ((merc.available AND (COALESCE(merc.connected, false) OR merc.always_online) AND COALESCE((true), false))) DESC, merc.chain_priority DESC, d.distance, (
  • Sort Method: quicksort Memory: 25kB
6. 0.002 0.273 ↓ 0.0 0 1

Nested Loop Left Join (cost=1.39..100.89 rows=6 width=616) (actual time=0.272..0.273 rows=0 loops=1)

7. 0.002 0.271 ↓ 0.0 0 1

Nested Loop (cost=1.11..75.59 rows=6 width=538) (actual time=0.271..0.271 rows=0 loops=1)

8. 0.079 0.115 ↑ 6.0 1 1

Nested Loop Left Join (cost=0.85..74.12 rows=6 width=506) (actual time=0.094..0.115 rows=1 loops=1)

  • Filter: COALESCE((true), false)
  • -> Index Only Scan using merchant_shifts_merchant_short_id_dow_shift_range_excl on merchant_shifts shift (cost=0.43..2.73 rows=1 width=31) (actual time=0.054
9. 0.036 0.036 ↑ 11.0 1 1

Index Scan using idx_merchant_test1 on merchants merc (cost=0.41..43.00 rows=11 width=519) (actual time=0.024..0.036 rows=1 loops=1)

  • Index Cond: ((supports_takeout = true) AND (supports_delivery = false) AND (supports_dark_kitchen = false))
  • Filter: (supports_takeout AND (NOT supports_delivery) AND (NOT supports_dark_kitchen) AND available AND (COALESCE(connected, false) OR always_online) AND
  • Rows Removed by Filter: 4
  • Index Cond: ((merchant_short_id = merc.merchant_short_id) AND (dow = (date_part('dow'::text, timezone((merc.timezone)::text, now())))::integer) AND (shif
  • Heap Fetches: 1
10. 0.154 0.154 ↓ 0.0 0 1

Function Scan on round d (cost=0.26..0.36 rows=1 width=32) (actual time=0.153..0.154 rows=0 loops=1)

  • Filter: (distance <= 15.0)
  • Rows Removed by Filter: 1
11. 0.000 0.000 ↓ 0.0 0

Index Scan using chain_external_id_key on merchant_chain chain (cost=0.28..4.21 rows=1 width=82) (never executed)

  • Index Cond: ((merc.group_id)::text = (external_id)::text)
Planning time : 1.780 ms
Execution time : 0.600 ms