some plpgsql stuff

sql/insert_url.sql

@@ -0,0 +1,18 @@
+CREATE OR REPLACE FUNCTION insert_url(in_url text) RETURNS integer AS $$
+BEGIN
+	PERFORM * FROM artist_website aw
+	WHERE aw.url = in_url;
+
+    IF FOUND THEN
+        RETURN 1;
+    END IF;
+
+	INSERT INTO artist_website (url) VALUES (in_url);
+	
+	CALL set_artist_name(in_url);
+	CALL set_website_name(in_url);
+	CALL set_folder_path(in_url);
+
+	RETURN 0;
+END;
+$$ LANGUAGE plpgsql STRICT;