artist urls: add index on url column.

db/migrate/20220403220558_add_url_index_on_artist_urls.rb

@@ -0,0 +1,5 @@
+class AddURLIndexOnArtistURLs < ActiveRecord::Migration[7.0]
+  def change
+    add_index :artist_urls, :url, opclass: :text_pattern_ops
+  end
+end

db/structure.sql

@@ -3146,6 +3146,13 @@ CREATE INDEX index_artist_urls_on_normalized_url_trgm ON public.artist_urls USIN
 CREATE INDEX index_artist_urls_on_regexp_replace_lower_url ON public.artist_urls USING btree (((regexp_replace(lower(url), '^https?://|/$'::text, ''::text, 'g'::text) || '/'::text)) text_pattern_ops);
 
 
+--
+-- Name: index_artist_urls_on_url; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX index_artist_urls_on_url ON public.artist_urls USING btree (url text_pattern_ops);
+
+
 --
 -- Name: index_artist_urls_on_url_trgm; Type: INDEX; Schema: public; Owner: -
 --
@@ -5788,6 +5795,7 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20220210200157'),
 ('20220211075129'),
 ('20220318082614'),
-('20220403042706');
+('20220403042706'),
+('20220403220558');