1 files changed, 41 insertions, 0 deletions
diff --git a/build/db-init/rev.sql b/build/db-init/rev.sql
new file mode 100644
index 0000000..d8443c3
--- /dev/null
+++ b/build/db-init/rev.sql
@@ -0,0 +1,41 @@
+--- CRIMSON --- A simple PHP framework.
+--- Copyright © 2024 Freya Murphy <contact@freyacat.org>
+---
+--- This file is part of CRIMSON.
+---
+--- CRIMSON is free software; you can redistribute it and/or modify it
+--- under the terms of the GNU General Public License as published by
+--- the Free Software Foundation; either version 3 of the License, or (at
+--- your option) any later version.
+---
+--- CRIMSON is distributed in the hope that it will be useful, but
+--- WITHOUT ANY WARRANTY; without even the implied warranty of
+--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+--- GNU General Public License for more details.
+---
+--- You should have received a copy of the GNU General Public License
+--- along with CRIMSON. If not, see <http://www.gnu.org/licenses/>.
+
+-- Gets the current databse revision.
+
+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 POSTGRES_USER;
+
+SELECT curr_revision();