X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/73953cbac95847740339d7a5ee3c0e5f142d93c5..b8385fc52de32231e64789cfbf56a246b18b38d8:/nominatim/tools/freeze.py

diff --git a/nominatim/tools/freeze.py b/nominatim/tools/freeze.py
index a182fc8b..602def55 100644
--- a/nominatim/tools/freeze.py
+++ b/nominatim/tools/freeze.py
@@ -1,10 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# This file is part of Nominatim. (https://nominatim.org)
+#
+# Copyright (C) 2022 by the Nominatim developer community.
+# For a full list of authors see the git log.
 """
 Functions for removing unnecessary data from the database.
 """
+from typing import Optional
 from pathlib import Path
 
 from psycopg2 import sql as pysql
 
+from nominatim.db.connection import Connection
+
 UPDATE_TABLES = [
     'address_levels',
     'gb_postcode',
@@ -19,7 +28,7 @@ UPDATE_TABLES = [
     'wikipedia_%'
 ]
 
-def drop_update_tables(conn):
+def drop_update_tables(conn: Connection) -> None:
     """ Drop all tables only necessary for updating the database from
         OSM replication data.
     """
@@ -36,10 +45,14 @@ def drop_update_tables(conn):
     conn.commit()
 
 
-def drop_flatnode_file(fname):
+def drop_flatnode_file(fpath: Optional[Path]) -> None:
     """ Remove the flatnode file if it exists.
     """
-    if fname:
-        fpath = Path(fname)
-        if fpath.exists():
-            fpath.unlink()
+    if fpath and fpath.exists():
+        fpath.unlink()
+
+def is_frozen(conn: Connection) -> bool:
+    """ Returns true if database is in a frozen state
+    """
+
+    return conn.table_exists('place') is False