Improved performance for artist search queries

Author: MusicMoveArr

MiniMediaMetadataAPI.Application/Repositories/DeezerRepository.cs

@@ -20,7 +20,14 @@ public DeezerRepository(IOptions<DatabaseConfiguration> databaseConfiguration)
                          SELECT *
                          FROM deezer_artist da
                          JOIN deezer_artist_image_link dai ON dai.artistid = da.artistid
-                         where lower(da.name) % lower(@name)";
+
+                         WHERE CASE
+                                WHEN array_length(show_trgm(lower(@name)), 1) IS NULL THEN false
+                                ELSE lower(da.name) % lower(@name)
+                            END
+
+                         ORDER BY similarity(lower(da.name), lower(@name)) DESC
+                         limit 500";
 
         await using var conn = new NpgsqlConnection(_databaseConfiguration.ConnectionString);
         await conn.OpenAsync();

MiniMediaMetadataAPI.Application/Repositories/DiscogsRepository.cs

@@ -19,7 +19,13 @@ public DiscogsRepository(IOptions<DatabaseConfiguration> databaseConfiguration)
         string query = @"SET LOCAL pg_trgm.similarity_threshold = 0.5;
                          SELECT da.artistid, regexp_replace(da.name, ' \([0-9]*\)$', '' ) as name, da.realname, da.profile, da.dataquality, da.lastsynctime
                          FROM discogs_artist da
-                         where lower(da.name) % lower(@name)";
+                         WHERE CASE
+                                WHEN array_length(show_trgm(lower(@name)), 1) IS NULL THEN false
+                                ELSE lower(da.name) % lower(@name)
+                            END
+
+                         ORDER BY similarity(lower(da.name), lower(@name)) DESC
+                         limit 500";
 
         await using var conn = new NpgsqlConnection(_databaseConfiguration.ConnectionString);
         await conn.OpenAsync();

MiniMediaMetadataAPI.Application/Repositories/MusicBrainzRepository.cs

@@ -17,11 +17,15 @@ public MusicBrainzRepository(IOptions<DatabaseConfiguration> databaseConfigurati
     public async Task<List<MusicBrainzArtistModel>?> SearchArtistAsync(string name, int offset)
     {
         string query = @"SET LOCAL pg_trgm.similarity_threshold = 0.5;
-                         SELECT * 
-                         FROM MusicBrainz_Artist 
-                         where 
-                            lower(name) % lower(@name)
-                            or lower(sortname) % lower(@name)";
+                         SELECT ma.* 
+                         FROM MusicBrainz_Artist ma
+                         WHERE CASE
+                                WHEN array_length(show_trgm(lower(@name)), 1) IS NULL THEN false
+                                ELSE lower(ma.name) % lower(@name) 
+                                    or lower(ma.sortname) % lower(@name) 
+                            end
+                         ORDER BY similarity(lower(ma.name), lower(@name)) DESC
+                         limit 100";
 
         await using var conn = new NpgsqlConnection(_databaseConfiguration.ConnectionString);
         await conn.OpenAsync();

MiniMediaMetadataAPI.Application/Repositories/SoundCloudRepository.cs

@@ -20,7 +20,13 @@ public SoundCloudRepository(IOptions<DatabaseConfiguration> databaseConfiguratio
         string query = @"SET LOCAL pg_trgm.similarity_threshold = 0.5;
                          SELECT * 
                          FROM soundcloud_user su
-                         where lower(su.title) % lower(@name)";
+                         WHERE CASE
+                                WHEN array_length(show_trgm(lower(@name)), 1) IS NULL THEN false
+                                ELSE lower(su.title) % lower(@name)
+                            END
+
+                         ORDER BY similarity(lower(su.title), lower(@name)) DESC
+                         limit 100";
 
         await using var conn = new NpgsqlConnection(_databaseConfiguration.ConnectionString);
         await conn.OpenAsync();

MiniMediaMetadataAPI.Application/Repositories/SpotifyRepository.cs

@@ -20,7 +20,13 @@ public SpotifyRepository(IOptions<DatabaseConfiguration> databaseConfiguration)
                          SELECT * 
                          FROM spotify_artist sa
                          left join spotify_artist_image sai on sai.artistid = sa.id
-                         where lower(sa.name) % lower(@name)";
+                         WHERE CASE
+                                WHEN array_length(show_trgm(lower(@name)), 1) IS NULL THEN false
+                                ELSE lower(sa.name) % lower(@name)
+                            END
+
+                         ORDER BY similarity(lower(sa.name), lower(@name)) DESC
+                         limit 500";
 
         await using var conn = new NpgsqlConnection(_databaseConfiguration.ConnectionString);
         await conn.OpenAsync();

MiniMediaMetadataAPI.Application/Repositories/TidalRepository.cs

@@ -20,7 +20,13 @@ public TidalRepository(IOptions<DatabaseConfiguration> databaseConfiguration)
                          SELECT * 
                          FROM tidal_artist ta
                          left join tidal_artist_image_link tai on tai.artistid = ta.artistid
-                         where lower(ta.name) % lower(@name)";
+                         WHERE CASE
+                                WHEN array_length(show_trgm(lower(@name)), 1) IS NULL THEN false
+                                ELSE lower(ta.name) % lower(@name)
+                            END
+
+                         ORDER BY similarity(lower(ta.name), lower(@name)) DESC
+                         limit 500";
 
         await using var conn = new NpgsqlConnection(_databaseConfiguration.ConnectionString);
         await conn.OpenAsync();