Add desc indexes to optimize desc query

docker-compose.gatling.yml

@@ -40,6 +40,7 @@ services:
       - 5432:5432
     networks:
       - fide_api
+    command: postgres -c shared_preload_libraries=pg_stat_statements -c pg_stat_statements.track=all
     restart: unless-stopped
     deploy:
       resources:

docker-compose.yml

@@ -7,6 +7,7 @@ services:
     container_name: fide_postgres
     volumes:
       - ./.containers_data/postgres:/var/lib/postgresql/data
+    command: postgres -c shared_preload_libraries=pg_stat_statements -c pg_stat_statements.track=all
     environment:
       POSTGRES_DB: fide
       POSTGRES_USER: admin

modules/db/src/main/resources/db/migration/V0009__add_desc_index.sql

@@ -0,0 +1,21 @@
+-- Add desc indexes for players
+CREATE INDEX players_name_desc_idx ON players(name DESC NULLS LAST);
+CREATE INDEX players_standard_desc_idx ON players(standard DESC NULLS LAST);
+CREATE INDEX players_rapid_desc_idx ON players(rapid DESC NULLS LAST);
+CREATE INDEX players_blitz_desc_idx ON players(blitz DESC NULLS LAST);
+
+-- Add desc indexes for federations_summary
+CREATE INDEX fed_sum_avg_rating_desc_idx ON federations_summary(avg_rating DESC NULLS LAST);
+CREATE INDEX fed_sum_avg_standard_desc_idx ON federations_summary(avg_standard DESC NULLS LAST);
+CREATE INDEX fed_sum_avg_rapid_desc_idx ON federations_summary(avg_rapid DESC NULLS LAST);
+CREATE INDEX fed_sum_avg_blitz_desc_idx ON federations_summary(avg_blitz DESC NULLS LAST);
+CREATE INDEX fed_sum_avg_top_standard_desc_idx ON federations_summary(avg_top_standard DESC NULLS LAST);
+CREATE INDEX fed_sum_avg_top_rapid_desc_idx ON federations_summary(avg_top_rapid DESC NULLS LAST);
+CREATE INDEX fed_sum_avg_top_blitz_desc_idx ON federations_summary(avg_top_blitz DESC NULLS LAST);
+CREATE INDEX fed_sum_avg_top_standard_rank_desc_idx ON federations_summary(avg_top_standard_rank DESC NULLS LAST);
+CREATE INDEX fed_sum_avg_top_rapid_rank_desc_idx ON federations_summary(avg_top_rapid_rank DESC NULLS LAST);
+CREATE INDEX fed_sum_avg_top_blitz_rank_desc_idx ON federations_summary(avg_top_blitz_rank DESC NULLS LAST);
+CREATE INDEX fed_sum_standard_players_desc_idx ON federations_summary(standard_players DESC NULLS LAST);
+CREATE INDEX fed_sum_rapid_players_desc_idx ON federations_summary(rapid_players DESC NULLS LAST);
+CREATE INDEX fed_sum_blitz_players_desc_idx ON federations_summary(blitz_players DESC NULLS LAST);
+CREATE INDEX fed_sum_players_desc_idx ON federations_summary(players DESC NULLS LAST);