explain.depesz.com

PostgreSQL's explain analyze made readable

Result: qf9

Settings
# exclusive inclusive rows x rows loops node
1. 0.005 1.749 ↓ 6.3 19 1

Append (cost=1.48..17.08 rows=3 width=296) (actual time=0.668..1.749 rows=19 loops=1)

2. 0.001 0.070 ↓ 0.0 0 1

Nested Loop Left Join (cost=1.48..6.51 rows=1 width=296) (actual time=0.070..0.070 rows=0 loops=1)

  • Output: sc.member_guid, sc.other_member_guid, NULL::bigint, NULL::timestamp with time zone, NULL::timestamp with time zone, pc.conversation_id, pc.member_conversation_legacy_id, pc.other_member_conversation_legacy_id, pc.member_latest_message_sent_tstamp, pc.other_member_latest_message_sent_tstamp, pc.conversation_depth, pc.is_either_member_blocked, pc.is_member_latest_message_sender, pc.member_has_new_message, pc.other_member_has_new_message, pc.is_conversation_removed_by_member, pc.is_conversation_removed_by_other_member, pc.is_member_deleted, pc.is_member_ghosted, pc.is_other_member_deleted, pc.is_other_member_ghosted, pc.member_has_priority_message, pc.other_member_has_priority_message, pc.latest_message_type_id, mp.gender_identity_type, mp.first_name, mp.home_city_name, mp.main_image_thumbnail_url, mp.last_activity_tstamp, mp.date_of_birth, mp.legacy_profile_id, mp.is_upgraded, mp.username, mp.headline, mp.show_firstname, mp.seeking_gender
  • Inner Unique: true
3. 0.000 0.069 ↓ 0.0 0 1

Nested Loop (cost=1.37..5.18 rows=1 width=88) (actual time=0.069..0.069 rows=0 loops=1)

  • Output: pc.conversation_id, pc.member_conversation_legacy_id, pc.other_member_conversation_legacy_id, pc.member_latest_message_sent_tstamp, pc.other_member_latest_message_sent_tstamp, pc.conversation_depth, pc.is_either_member_blocked, pc.is_member_latest_message_sender, pc.member_has_new_message, pc.other_member_has_new_message, pc.is_conversation_removed_by_member, pc.is_conversation_removed_by_other_member, pc.is_member_deleted, pc.is_member_ghosted, pc.is_other_member_deleted, pc.is_other_member_ghosted, pc.member_has_priority_message, pc.other_member_has_priority_message, pc.latest_message_type_id, sc.member_guid, sc.other_member_guid
  • Inner Unique: true
4. 0.003 0.069 ↓ 0.0 0 1

Bitmap Heap Scan on source_v2.conversations sc (cost=1.32..2.65 rows=2 width=40) (actual time=0.069..0.069 rows=0 loops=1)

  • Output: sc.conversation_id, sc.member_guid, sc.other_member_guid, sc.member_removed_tstamp, sc.other_member_removed_tstamp, sc.member_read_tstamp, sc.other_member_read_tstamp, sc.inserted_tstamp
  • Recheck Cond: ((sc.member_guid = 'c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid) OR (sc.other_member_guid = 'c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid))
5. 0.001 0.066 ↓ 0.0 0 1

BitmapOr (cost=1.32..1.32 rows=2 width=0) (actual time=0.066..0.066 rows=0 loops=1)

6. 0.040 0.040 ↓ 0.0 0 1

Bitmap Index Scan on conversations_member_guid_idx (cost=0.00..0.66 rows=1 width=0) (actual time=0.040..0.040 rows=0 loops=1)

  • Index Cond: (sc.member_guid = 'c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid)
7. 0.025 0.025 ↓ 0.0 0 1

Bitmap Index Scan on conversations_other_member_guid_idx (cost=0.00..0.66 rows=1 width=0) (actual time=0.025..0.025 rows=0 loops=1)

  • Index Cond: (sc.other_member_guid = 'c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid)
8. 0.000 0.000 ↓ 0.0 0

Index Scan using conversations_pk on projection_v2.conversations pc (cost=0.06..1.27 rows=1 width=56) (never executed)

  • Output: pc.conversation_id, pc.member_conversation_legacy_id, pc.other_member_conversation_legacy_id, pc.member_latest_message_sent_tstamp, pc.other_member_latest_message_sent_tstamp, pc.latest_message_type_id, pc.conversation_depth, pc.is_either_member_blocked, pc.is_member_latest_message_sender, pc.member_has_new_message, pc.other_member_has_new_message, pc.is_conversation_removed_by_member, pc.is_conversation_removed_by_other_member, pc.is_member_deleted, pc.is_member_ghosted, pc.is_other_member_deleted, pc.is_other_member_ghosted, pc.member_has_priority_message, pc.other_member_has_priority_message
  • Index Cond: (pc.conversation_id = sc.conversation_id)
9. 0.000 0.000 ↓ 0.0 0

Index Scan using member_profiles_pk on source.member_profiles mp (cost=0.11..1.32 rows=1 width=200) (never executed)

  • Output: mp.gender_identity_type, mp.first_name, mp.home_city_name, mp.main_image_thumbnail_url, mp.last_activity_tstamp, mp.date_of_birth, mp.legacy_profile_id, mp.is_upgraded, mp.username, mp.headline, mp.show_firstname, mp.seeking_gender, mp.member_guid
  • Index Cond: (mp.member_guid = CASE WHEN ('c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid IS DISTINCT FROM sc.member_guid) THEN sc.member_guid ELSE sc.other_member_guid END)
10. 1.086 1.674 ↓ 9.5 19 1

Nested Loop Left Join (cost=1.55..10.53 rows=2 width=296) (actual time=0.597..1.674 rows=19 loops=1)

  • Output: sm.member_guid, sm.other_member_guid, sm.mutual_id, sm.inserted_tstamp, sm.created_tstamp, NULL::bigint, NULL::bigint, NULL::bigint, NULL::timestamp with time zone, NULL::timestamp with time zone, NULL::smallint, source.calculate_is_either_member_blocked(sm.member_guid, sm.other_member_guid), NULL::boolean, NULL::boolean, NULL::boolean, NULL::boolean, NULL::boolean, (mp2.member_deleted_tstamp IS NOT NULL), (mp2.member_ghosted_tstamp IS NOT NULL), (mp_1.member_deleted_tstamp IS NOT NULL), (mp_1.member_ghosted_tstamp IS NOT NULL), NULL::boolean, NULL::boolean, NULL::smallint, mp_1.gender_identity_type, mp_1.first_name, mp_1.home_city_name, mp_1.main_image_thumbnail_url, mp_1.last_activity_tstamp, mp_1.date_of_birth, mp_1.legacy_profile_id, mp_1.is_upgraded, mp_1.username, mp_1.headline, mp_1.show_firstname, mp_1.seeking_gender
  • Inner Unique: true
11. 0.029 0.493 ↓ 9.5 19 1

Nested Loop Left Join (cost=1.43..7.78 rows=2 width=256) (actual time=0.160..0.493 rows=19 loops=1)

  • Output: sm.member_guid, sm.other_member_guid, sm.mutual_id, sm.inserted_tstamp, sm.created_tstamp, mp_1.member_deleted_tstamp, mp_1.member_ghosted_tstamp, mp_1.gender_identity_type, mp_1.first_name, mp_1.home_city_name, mp_1.main_image_thumbnail_url, mp_1.last_activity_tstamp, mp_1.date_of_birth, mp_1.legacy_profile_id, mp_1.is_upgraded, mp_1.username, mp_1.headline, mp_1.show_firstname, mp_1.seeking_gender
  • Inner Unique: true
12. 0.074 0.179 ↓ 9.5 19 1

Bitmap Heap Scan on source_v2.mutual sm (cost=1.32..5.13 rows=2 width=56) (actual time=0.103..0.179 rows=19 loops=1)

  • Output: sm.mutual_id, sm.member_guid, sm.other_member_guid, sm.inserted_tstamp, sm.created_tstamp
  • Recheck Cond: ((sm.member_guid = 'c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid) OR (sm.other_member_guid = 'c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid))
  • Filter: ((sm.member_guid = 'c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid) OR ((sm.other_member_guid = 'c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid) AND (NOT (alternatives: SubPlan 1 or hashed SubPlan 2))))
  • Heap Blocks: exact=2
13. 0.001 0.073 ↓ 0.0 0 1

BitmapOr (cost=1.32..1.32 rows=2 width=0) (actual time=0.073..0.073 rows=0 loops=1)

14. 0.040 0.040 ↓ 3.0 3 1

Bitmap Index Scan on mutual_member_guid_idx (cost=0.00..0.66 rows=1 width=0) (actual time=0.040..0.040 rows=3 loops=1)

  • Index Cond: (sm.member_guid = 'c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid)
15. 0.032 0.032 ↓ 16.0 16 1

Bitmap Index Scan on mutual_other_member_guid_idx (cost=0.00..0.66 rows=1 width=0) (actual time=0.032..0.032 rows=16 loops=1)

  • Index Cond: (sm.other_member_guid = 'c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid)
16.          

SubPlan (for Bitmap Heap Scan)

17. 0.032 0.032 ↓ 0.0 0 16

Index Scan using conversations_other_member_guid_idx on source_v2.conversations sc_1 (cost=0.06..1.27 rows=1 width=0) (actual time=0.002..0.002 rows=0 loops=16)

  • Index Cond: (sc_1.other_member_guid = sm.other_member_guid)
  • Filter: (sc_1.member_guid = sm.member_guid)
18. 0.000 0.000 ↓ 0.0 0

Seq Scan on source_v2.conversations sc_2 (cost=0.00..134.36 rows=2,936 width=32) (never executed)

  • Output: sc_2.member_guid, sc_2.other_member_guid
19. 0.285 0.285 ↑ 1.0 1 19

Index Scan using member_profiles_pk on source.member_profiles mp_1 (cost=0.11..1.32 rows=1 width=216) (actual time=0.015..0.015 rows=1 loops=19)

  • Output: mp_1.member_deleted_tstamp, mp_1.member_ghosted_tstamp, mp_1.gender_identity_type, mp_1.first_name, mp_1.home_city_name, mp_1.main_image_thumbnail_url, mp_1.last_activity_tstamp, mp_1.date_of_birth, mp_1.legacy_profile_id, mp_1.is_upgraded, mp_1.username, mp_1.headline, mp_1.show_firstname, mp_1.seeking_gender, mp_1.member_guid
  • Index Cond: (mp_1.member_guid = CASE WHEN ('c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid IS DISTINCT FROM sm.member_guid) THEN sm.member_guid ELSE sm.other_member_guid END)
20. 0.095 0.095 ↑ 1.0 1 19

Index Scan using member_profiles_pk on source.member_profiles mp2 (cost=0.11..1.32 rows=1 width=32) (actual time=0.005..0.005 rows=1 loops=19)

  • Output: mp2.member_deleted_tstamp, mp2.member_ghosted_tstamp, mp2.member_guid
  • Index Cond: (mp2.member_guid = CASE WHEN ('c4a36321-0758-a1f0-49af-d5fb17d877db'::uuid IS DISTINCT FROM sm.member_guid) THEN sm.other_member_guid ELSE sm.member_guid END)
Planning time : 1.275 ms