explain.depesz.com

PostgreSQL's explain analyze made readable

Result: ifU7

Settings
# exclusive inclusive rows x rows loops node
1. 0.008 1.708 ↓ 5.3 32 1

Append (cost=1.55..39.33 rows=6 width=296) (actual time=0.358..1.708 rows=32 loops=1)

2. 1.001 1.489 ↓ 11.5 23 1

Nested Loop Left Join (cost=1.55..10.53 rows=2 width=296) (actual time=0.357..1.489 rows=23 loops=1)

3. 0.023 0.396 ↓ 11.5 23 1

Nested Loop Left Join (cost=1.43..7.78 rows=2 width=256) (actual time=0.055..0.396 rows=23 loops=1)

4. 0.038 0.143 ↓ 11.5 23 1

Bitmap Heap Scan on mutual sm (cost=1.32..5.13 rows=2 width=56) (actual time=0.036..0.143 rows=23 loops=1)

  • Recheck Cond: ((member_guid = '66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid) OR (other_member_guid = '66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid))
  • Filter: ((member_guid = '66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid) OR ((other_member_guid = '66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid) AND (NOT (alternatives: SubPlan 1 or hashed SubPlan 2))))
  • Rows Removed by Filter: 1
  • Heap Blocks: exact=3
5. 0.001 0.027 ↓ 0.0 0 1

BitmapOr (cost=1.32..1.32 rows=2 width=0) (actual time=0.027..0.027 rows=0 loops=1)

6. 0.018 0.018 ↓ 30.0 30 1

Bitmap Index Scan on mutual_member_guid_idx (cost=0.00..0.66 rows=1 width=0) (actual time=0.018..0.018 rows=30 loops=1)

  • Index Cond: (member_guid = '66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid)
7. 0.008 0.008 ↓ 19.0 19 1

Bitmap Index Scan on mutual_other_member_guid_idx (cost=0.00..0.66 rows=1 width=0) (actual time=0.008..0.008 rows=19 loops=1)

  • Index Cond: (other_member_guid = '66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid)
8.          

SubPlan (for Bitmap Heap Scan)

9. 0.078 0.078 ↓ 0.0 0 13

Index Scan using conversations_other_member_guid_idx on conversations sc_1 (cost=0.06..1.27 rows=1 width=0) (actual time=0.006..0.006 rows=0 loops=13)

  • Index Cond: (other_member_guid = sm.other_member_guid)
  • Filter: (member_guid = sm.member_guid)
  • Rows Removed by Filter: 5
10. 0.000 0.000 ↓ 0.0 0

Seq Scan on conversations sc_2 (cost=0.00..134.36 rows=2,936 width=32) (never executed)

11. 0.230 0.230 ↑ 1.0 1 23

Index Scan using member_profiles_pk on member_profiles mp (cost=0.11..1.32 rows=1 width=216) (actual time=0.010..0.010 rows=1 loops=23)

  • Index Cond: (member_guid = CASE WHEN ('66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid IS DISTINCT FROM sm.member_guid) THEN sm.member_guid ELSE sm.other_member_guid END)
12. 0.092 0.092 ↑ 1.0 1 23

Index Scan using member_profiles_pk on member_profiles mp2 (cost=0.11..1.32 rows=1 width=32) (actual time=0.004..0.004 rows=1 loops=23)

  • Index Cond: (member_guid = CASE WHEN ('66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid IS DISTINCT FROM sm.member_guid) THEN sm.other_member_guid ELSE sm.member_guid END)
13. 0.012 0.211 ↓ 2.2 9 1

Nested Loop Left Join (cost=1.50..28.71 rows=4 width=296) (actual time=0.051..0.211 rows=9 loops=1)

14. 0.009 0.109 ↓ 2.2 9 1

Nested Loop (cost=1.39..23.41 rows=4 width=88) (actual time=0.033..0.109 rows=9 loops=1)

15. 0.026 0.034 ↑ 1.0 11 1

Bitmap Heap Scan on conversations sc (cost=1.33..9.47 rows=11 width=40) (actual time=0.012..0.034 rows=11 loops=1)

  • Recheck Cond: ((member_guid = '66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid) OR (other_member_guid = '66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid))
  • Heap Blocks: exact=9
16. 0.000 0.008 ↓ 0.0 0 1

BitmapOr (cost=1.33..1.33 rows=11 width=0) (actual time=0.008..0.008 rows=0 loops=1)

17. 0.006 0.006 ↑ 1.0 6 1

Bitmap Index Scan on conversations_member_guid_idx (cost=0.00..0.67 rows=6 width=0) (actual time=0.006..0.006 rows=6 loops=1)

  • Index Cond: (member_guid = '66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid)
18. 0.002 0.002 ↑ 1.0 5 1

Bitmap Index Scan on conversations_other_member_guid_idx (cost=0.00..0.66 rows=5 width=0) (actual time=0.002..0.002 rows=5 loops=1)

  • Index Cond: (other_member_guid = '66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid)
19. 0.066 0.066 ↑ 1.0 1 11

Index Scan using conversations_pk on conversations pc (cost=0.06..1.27 rows=1 width=56) (actual time=0.006..0.006 rows=1 loops=11)

  • Index Cond: (conversation_id = sc.conversation_id)
20. 0.090 0.090 ↑ 1.0 1 9

Index Scan using member_profiles_pk on member_profiles mp_1 (cost=0.11..1.32 rows=1 width=200) (actual time=0.010..0.010 rows=1 loops=9)

  • Index Cond: (member_guid = CASE WHEN ('66964ee7-4dca-55ab-9431-450b2e74b9ca'::uuid IS DISTINCT FROM sc.member_guid) THEN sc.member_guid ELSE sc.other_member_guid END)
Planning time : 1.199 ms