modify sql functions

sql/get_all_convertable_paths.sql

@@ -0,0 +1,24 @@
+CREATE OR REPLACE FUNCTION public.get_all_convertable_paths() RETURNS Table (bad_path text, good_path text) 
+	LANGUAGE plpgsql STRICT
+	AS $$
+DECLARE
+	url text;
+	artist_name text;
+	temp_bad_path text;
+	temp_good_path text;
+BEGIN
+	FOR url IN 
+		SELECT aw.url FROM artist_website aw
+	LOOP
+		artist_name = get_artist_name(url);
+		temp_bad_path = concat('Artists/', artist_name);
+		temp_good_path = concat('Artists/', convert_artist_name(artist_name));
+
+		PERFORM * FROM artist WHERE artist.name = artist_name;
+
+	    IF NOT FOUND THEN
+	        RETURN QUERY SELECT temp_bad_path,temp_good_path;
+	    END IF;
+	END LOOP;
+END;
+$$;