explain.depesz.com

PostgreSQL's explain analyze made readable

Result: hmeY

Settings
# exclusive inclusive rows x rows loops node
1. 0.589 102.040 ↓ 435.0 435 1

GroupAggregate (cost=13,341.12..13,341.14 rows=1 width=16) (actual time=101.220..102.040 rows=435 loops=1)

  • Group Key: label_links.label_id, (date(issues.created_at))
2. 1.669 101.451 ↓ 3,807.0 3,807 1

Sort (cost=13,341.12..13,341.12 rows=1 width=12) (actual time=101.214..101.451 rows=3,807 loops=1)

  • Sort Key: label_links.label_id, (date(issues.created_at))
  • Sort Method: quicksort Memory: 275kB
3. 2.092 99.782 ↓ 3,807.0 3,807 1

Nested Loop Left Join (cost=1,266.77..13,341.11 rows=1 width=12) (actual time=0.956..99.782 rows=3,807 loops=1)

  • Filter: ((project_features.issues_access_level IS NULL) OR (project_features.issues_access_level = ANY ('{20,30}'::integer[])) OR ((project_features.issues_access_level = 10) AND (alternatives: SubPlan 3 or hashed SubPlan 4)))
  • Rows Removed by Filter: 8
4. 0.000 90.042 ↓ 3,815.0 3,815 1

Nested Loop (cost=1,266.33..13,337.01 rows=1 width=20) (actual time=0.942..90.042 rows=3,815 loops=1)

5. 1.138 16.775 ↓ 53.8 8,335 1

Nested Loop (cost=1,265.77..13,183.45 rows=155 width=16) (actual time=0.821..16.775 rows=8,335 loops=1)

6. 0.086 4.729 ↑ 1.9 606 1

Nested Loop (cost=1,265.21..12,148.44 rows=1,175 width=4) (actual time=0.696..4.729 rows=606 loops=1)

7. 0.039 0.678 ↑ 2.0 65 1

HashAggregate (cost=1,264.77..1,266.08 rows=131 width=4) (actual time=0.653..0.678 rows=65 loops=1)

  • Group Key: namespaces.id
8. 0.639 0.639 ↑ 2.0 65 1

CTE Scan on base_and_descendants namespaces (cost=1,260.52..1,263.14 rows=131 width=4) (actual time=0.024..0.639 rows=65 loops=1)

9.          

CTE base_and_descendants

10. 0.131 0.577 ↑ 2.0 65 1

Recursive Union (cost=0.43..1,260.52 rows=131 width=322) (actual time=0.021..0.577 rows=65 loops=1)

11. 0.016 0.016 ↑ 1.0 1 1

Index Scan using namespaces_pkey on namespaces namespaces_1 (cost=0.43..3.45 rows=1 width=322) (actual time=0.014..0.016 rows=1 loops=1)

  • Index Cond: (id = 9970)
  • Filter: ((type)::text = 'Group'::text)
12. 0.035 0.430 ↑ 1.0 13 5

Nested Loop (cost=0.43..125.44 rows=13 width=322) (actual time=0.013..0.086 rows=13 loops=5)

13. 0.005 0.005 ↓ 1.3 13 5

WorkTable Scan on base_and_descendants (cost=0.00..0.20 rows=10 width=4) (actual time=0.000..0.001 rows=13 loops=5)

14. 0.390 0.390 ↑ 1.0 1 65

Index Scan using index_namespaces_on_parent_id_and_id on namespaces namespaces_2 (cost=0.43..12.51 rows=1 width=322) (actual time=0.004..0.006 rows=1 loops=65)

  • Index Cond: (parent_id = base_and_descendants.id)
  • Filter: ((type)::text = 'Group'::text)
15. 2.147 3.965 ↑ 1.0 9 65

Index Scan using index_projects_on_namespace_id on projects (cost=0.43..82.98 rows=9 width=8) (actual time=0.012..0.061 rows=9 loops=65)

  • Index Cond: (namespace_id = namespaces.id)
  • Filter: ((alternatives: SubPlan 1 or hashed SubPlan 2) OR (visibility_level = ANY ('{10,20}'::integer[])))
16.          

SubPlan (forIndex Scan)

17. 1.818 1.818 ↑ 1.0 1 606

Index Only Scan using index_project_authorizations_on_user_id_project_id_access_level on project_authorizations (cost=0.56..3.59 rows=1 width=0) (actual time=0.003..0.003 rows=1 loops=606)

  • Index Cond: ((user_id = 4156052) AND (project_id = projects.id) AND (access_level >= 10))
  • Heap Fetches: 252
18. 0.000 0.000 ↓ 0.0 0

Index Only Scan using index_project_authorizations_on_user_id_project_id_access_level on project_authorizations project_authorizations_1 (cost=0.56..645.41 rows=2,171 width=4) (never executed)

  • Index Cond: ((user_id = 4156052) AND (access_level >= 10))
  • Heap Fetches: 0
19. 10.908 10.908 ↓ 1.8 14 606

Index Only Scan using index_issues_on_project_id_and_created_at_and_id_and_state on issues (cost=0.56..0.80 rows=8 width=16) (actual time=0.007..0.018 rows=14 loops=606)

  • Index Cond: ((project_id = projects.id) AND (created_at <= '2018-08-01 00:00:00+00'::timestamp with time zone) AND (created_at >= '2018-05-01 00:00:00+00'::timestamp with time zone))
  • Heap Fetches: 1077
20. 75.015 75.015 ↓ 0.0 0 8,335

Index Scan using index_label_links_on_target_id_and_target_type on label_links (cost=0.56..0.98 rows=1 width=8) (actual time=0.008..0.009 rows=0 loops=8,335)

  • Index Cond: ((target_id = issues.id) AND ((target_type)::text = 'Issue'::text))
  • Filter: (label_id = ANY ('{2731248,10230929,4116705,2492649,2278648,2779806}'::integer[]))
  • Rows Removed by Filter: 3
21. 7.630 7.630 ↑ 1.0 1 3,815

Index Scan using index_project_features_on_project_id on project_features (cost=0.43..0.49 rows=1 width=8) (actual time=0.002..0.002 rows=1 loops=3,815)

  • Index Cond: (projects.id = project_id)
22.          

SubPlan (forNested Loop Left Join)

23. 0.018 0.018 ↑ 1.0 1 6

Index Only Scan using index_project_authorizations_on_user_id_project_id_access_level on project_authorizations project_authorizations_2 (cost=0.56..3.59 rows=1 width=0) (actual time=0.003..0.003 rows=1 loops=6)

  • Index Cond: ((user_id = 4156052) AND (project_id = projects.id) AND (access_level >= 10))
  • Heap Fetches: 2
24. 0.000 0.000 ↓ 0.0 0

Index Only Scan using index_project_authorizations_on_user_id_project_id_access_level on project_authorizations project_authorizations_3 (cost=0.56..645.41 rows=2,171 width=4) (never executed)

  • Index Cond: ((user_id = 4156052) AND (access_level >= 10))
  • Heap Fetches: 0
Planning time : 2.740 ms
Execution time : 102.284 ms