diff --git a/PostgreSQL/common.sql b/PostgreSQL/common.sql
index 97f648b..6ba5aea 100644
--- a/PostgreSQL/common.sql
+++ b/PostgreSQL/common.sql
@@ -1,3 +1,9 @@
+-- pid
+SELECT pg_backend_pid();
+
+-- version
+SELECT version();
+
 -- search_path
 SHOW search_path;