explain.depesz.com

PostgreSQL's explain analyze made readable

Result: 5vaB

Settings
# exclusive inclusive rows x rows loops node
1. 0.261 73.199 ↑ 1.0 50 1

Nested Loop Left Join (cost=1.27..2,363.62 rows=50 width=1,237) (actual time=14.527..73.199 rows=50 loops=1)

2. 0.101 68.738 ↑ 1.0 50 1

Nested Loop (cost=0.85..693.49 rows=50 width=1,237) (actual time=10.845..68.738 rows=50 loops=1)

3. 0.045 66.237 ↑ 1.0 50 1

Limit (cost=0.42..270.37 rows=50 width=12) (actual time=8.633..66.237 rows=50 loops=1)

4. 66.192 66.192 ↑ 5,855.2 50 1

Index Scan Backward using send_mail_email_created_at on send_mail_email (cost=0.42..1,580,577.10 rows=292,762 width=12) (actual time=8.630..66.192 rows=50 loops=1)

  • Filter: ((app_id = ANY ('{1}'::integer[])) AND (date(timezone('UTC'::text, created_at)) >= '2018-12-15'::date) AND (date(timezone('UTC'::text, created_at)) <= '2019-03-15'::date))
5. 2.400 2.400 ↑ 1.0 1 50

Index Scan using send_mail_email_pkey on send_mail_email info (cost=0.42..8.44 rows=1 width=1,233) (actual time=0.047..0.048 rows=1 loops=50)

  • Index Cond: (id = send_mail_email.id)
6. 0.100 0.100 ↓ 0.0 0 50

Index Only Scan using collector_stats_fc41f286 on collector_stats stats (cost=0.42..4.44 rows=1 width=4) (actual time=0.002..0.002 rows=0 loops=50)

  • Index Cond: (email_id = send_mail_email.id)
  • Heap Fetches: 0
7.          

SubPlan (forNested Loop Left Join)

8. 0.100 0.150 ↑ 1.0 1 50

Result (cost=4.18..4.19 rows=1 width=0) (actual time=0.003..0.003 rows=1 loops=50)

9.          

Initplan (forResult)

10. 0.050 0.050 ↓ 0.0 0 50

Index Only Scan using track_linkemail_fdfd0ebf on track_linkemail (cost=0.15..8.22 rows=2 width=0) (actual time=0.001..0.001 rows=0 loops=50)

  • Index Cond: (email_id = info.id)
  • Heap Fetches: 0
11. 0.100 0.150 ↑ 1.0 1 50

Result (cost=8.17..8.18 rows=1 width=0) (actual time=0.002..0.003 rows=1 loops=50)

12.          

Initplan (forResult)

13. 0.050 0.050 ↓ 0.0 0 50

Index Only Scan using track_mailopen_fdfd0ebf on track_mailopen (cost=0.15..8.17 rows=1 width=0) (actual time=0.001..0.001 rows=0 loops=50)

  • Index Cond: (email_id = info.id)
  • Heap Fetches: 0
14. 3.750 3.750 ↑ 1.0 1 50

Index Scan using campaign_campaign_pkey on campaign_campaign (cost=0.28..8.29 rows=1 width=4) (actual time=0.074..0.075 rows=1 loops=50)

  • Index Cond: (id = info.campaign_id)
15. 0.050 0.050 ↓ 0.0 0 50

Index Scan using mail_template_template_pkey on mail_template_template (cost=0.27..8.29 rows=1 width=32) (actual time=0.001..0.001 rows=0 loops=50)

  • Index Cond: (id = info.template_id)