add sql

sql/get_urls_and_paths.sql

@@ -0,0 +1,19 @@
+CREATE OR REPLACE FUNCTION get_urls_and_paths(website_name text)
+RETURNS TABLE (
+	out_url text,
+	out_website_name text
+) AS
+$$
+BEGIN
+	RETURN QUERY SELECT aw.url, aw.folder_path
+				  FROM artist_website aw
+				  INNER JOIN website w ON aw.website_id = w.id
+                  WHERE  w.name ILIKE website_name;
+
+    IF NOT FOUND THEN
+        RAISE EXCEPTION 'No urls and paths found for website: %', website_name;
+    END IF;
+
+    RETURN;
+END;
+$$ LANGUAGE plpgsql;