X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/2f4eca8c46d96f7a4dce6808baa18915d5b8d5a4..76b1885595df885cab439372c72f45c9e5c01471:/nominatim/tools/migration.py

diff --git a/nominatim/tools/migration.py b/nominatim/tools/migration.py
index b5f0b80e..07fd2ec5 100644
--- a/nominatim/tools/migration.py
+++ b/nominatim/tools/migration.py
@@ -3,11 +3,11 @@ Functions for database migration to newer software versions.
 """
 import logging
 
-from ..db import properties
-from ..db.connection import connect
-from ..version import NOMINATIM_VERSION
-from . import refresh, database_import
-from ..errors import UsageError
+from nominatim.db import properties
+from nominatim.db.connection import connect
+from nominatim.version import NOMINATIM_VERSION
+from nominatim.tools import refresh, database_import
+from nominatim.errors import UsageError
 
 LOG = logging.getLogger()
 
@@ -156,3 +156,20 @@ def change_housenumber_transliteration(conn, **_):
         cur.execute("""UPDATE placex
                        SET housenumber = create_housenumber_id(housenumber)
                        WHERE housenumber is not null""")
+
+
+@_migration(3, 7, 0, 0)
+def switch_placenode_geometry_index(conn, **_):
+    """ Replace idx_placex_geometry_reverse_placeNode index.
+
+        Make the index slightly more permissive, so that it can also be used
+        when matching up boundaries and place nodes. It makes the index
+        idx_placex_adminname index unnecessary.
+    """
+    with conn.cursor() as cur:
+        cur.execute(""" CREATE INDEX IF NOT EXISTS idx_placex_geometry_placenode ON placex
+                        USING GIST (geometry)
+                        WHERE osm_type = 'N' and rank_search < 26
+                              and class = 'place' and type != 'postcode'
+                              and linked_place_id is null""")
+        cur.execute(""" DROP INDEX IF EXISTS idx_placex_adminname """)