core: improve indexes (#6095)

* core: improve indexes

* update plans

* queries

* postgres migration

* optimize query

* lint

* plans

* add indexes

* schema

* plans

* postgres schema

---------

Co-authored-by: Evgeny Poberezkin <evgeny@poberezkin.com>

src/Simplex/Chat/Store/Postgres/Migrations.hs

@@ -12,6 +12,7 @@ import Simplex.Chat.Store.Postgres.Migrations.M20250526_short_links
 import Simplex.Chat.Store.Postgres.Migrations.M20250702_contact_requests_remove_cascade_delete
 import Simplex.Chat.Store.Postgres.Migrations.M20250704_groups_conn_link_prepared_connection
 import Simplex.Chat.Store.Postgres.Migrations.M20250709_profile_short_descr
+import Simplex.Chat.Store.Postgres.Migrations.M20250721_indexes
 import Simplex.Messaging.Agent.Store.Shared (Migration (..))
 
 schemaMigrations :: [(String, Text, Maybe Text)]
@@ -23,7 +24,8 @@ schemaMigrations =
     ("20250526_short_links", m20250526_short_links, Just down_m20250526_short_links),
     ("20250702_contact_requests_remove_cascade_delete", m20250702_contact_requests_remove_cascade_delete, Just down_m20250702_contact_requests_remove_cascade_delete),
     ("20250704_groups_conn_link_prepared_connection", m20250704_groups_conn_link_prepared_connection, Just down_m20250704_groups_conn_link_prepared_connection),
-    ("20250709_profile_short_descr", m20250709_profile_short_descr, Just down_m20250709_profile_short_descr)
+    ("20250709_profile_short_descr", m20250709_profile_short_descr, Just down_m20250709_profile_short_descr),
+    ("20250721_indexes", m20250721_indexes, Just down_m20250721_indexes)
   ]
 
 -- | The list of migrations in ascending order by date

src/Simplex/Chat/Store/Postgres/Migrations/M20250721_indexes.hs

@@ -0,0 +1,37 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Chat.Store.Postgres.Migrations.M20250721_indexes where
+
+import Data.Text (Text)
+import qualified Data.Text as T
+import Text.RawString.QQ (r)
+
+m20250721_indexes :: Text
+m20250721_indexes =
+  T.pack
+    [r|
+DROP INDEX idx_contact_requests_xcontact_id;
+
+CREATE INDEX idx_contact_requests_xcontact_id ON contact_requests(user_id, xcontact_id);
+
+CREATE INDEX idx_chat_items_group_scope_stats_all ON chat_items (
+  user_id,
+  group_id,
+  group_scope_tag,
+  group_scope_group_member_id,
+  item_status,
+  chat_item_id,
+  user_mention
+);
+|]
+
+down_m20250721_indexes :: Text
+down_m20250721_indexes =
+  T.pack
+    [r|
+DROP INDEX idx_contact_requests_xcontact_id;
+
+CREATE INDEX idx_contact_requests_xcontact_id ON contact_requests(xcontact_id);
+
+DROP INDEX idx_chat_items_group_scope_stats_all;
+|]

src/Simplex/Chat/Store/Postgres/Migrations/chat_schema.sql

@@ -1624,6 +1624,10 @@ CREATE INDEX idx_chat_items_group_scope_item_ts ON test_chat_schema.chat_items U
 
 
 
+CREATE INDEX idx_chat_items_group_scope_stats_all ON test_chat_schema.chat_items USING btree (user_id, group_id, group_scope_tag, group_scope_group_member_id, item_status, chat_item_id, user_mention);
+
+
+
 CREATE UNIQUE INDEX idx_chat_items_group_shared_msg_id ON test_chat_schema.chat_items USING btree (user_id, group_id, group_member_id, shared_msg_id);
 
 
@@ -1784,7 +1788,7 @@ CREATE INDEX idx_contact_requests_user_contact_link_id ON test_chat_schema.conta
 
 
 
-CREATE INDEX idx_contact_requests_xcontact_id ON test_chat_schema.contact_requests USING btree (xcontact_id);
+CREATE INDEX idx_contact_requests_xcontact_id ON test_chat_schema.contact_requests USING btree (user_id, xcontact_id);