1 files changed, 21 insertions, 0 deletions
diff --git a/db/rev.sql b/db/rev.sql
new file mode 100644
index 0000000..dff1cfe
--- /dev/null
+++ b/db/rev.sql
@@ -0,0 +1,21 @@
+CREATE OR REPLACE FUNCTION curr_revision()
+RETURNS INTEGER
+LANGUAGE plpgsql VOLATILE
+AS $BODY$
+DECLARE
+	_revision INTEGER;
+BEGIN
+	BEGIN
+		SELECT curr_revision INTO _revision
+			FROM sys.database_info
+			WHERE name = current_database();
+		RETURN _revision;
+	EXCEPTION WHEN OTHERS THEN
+		RETURN 0;
+	END;
+END
+$BODY$;
+
+GRANT EXECUTE ON FUNCTION curr_revision() TO xssbook;
+
+SELECT curr_revision();