add tests for new data invalidation functions

[nominatim.git] / nominatim / tools / postcodes.py

diff --git a/nominatim/tools/postcodes.py b/nominatim/tools/postcodes.py
index 195d407ee3b8c7e43c591c2d0b74cbc910d5e28c..adc58ec59998e9f6ea132a706cf7c46ca803eff7 100644 (file)
--- a/nominatim/tools/postcodes.py
+++ b/nominatim/tools/postcodes.py
@@ -1,3 +1,9 @@
+# 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 importing, updating and otherwise maintaining the table
 of artificial postcode centroids.
 """
 Functions for importing, updating and otherwise maintaining the table
 of artificial postcode centroids.


@@ -7,7 +13,7 @@ import gzip
 import logging
 from math import isfinite
 
 import logging
 from math import isfinite
 

-from psycopg2.extras import execute_values
+from psycopg2 import sql as pysql

 
 from nominatim.db.connection import connect
 
 
 from nominatim.db.connection import connect
 


@@ -52,27 +58,26 @@ class _CountryPostcodesCollector:
 
         with conn.cursor() as cur:
             if to_add:
 
         with conn.cursor() as cur:
             if to_add:

-                execute_values(cur,
-                               """INSERT INTO location_postcode
-                                      (place_id, indexed_status, country_code,
-                                       postcode, geometry) VALUES %s""",
-                               to_add,
-                               template="""(nextval('seq_place'), 1, '{}',
-                                           %s, 'SRID=4326;POINT(%s %s)')
-                                        """.format(self.country))
+                cur.execute_values(
+                    """INSERT INTO location_postcode
+                         (place_id, indexed_status, country_code,
+                          postcode, geometry) VALUES %s""",
+                    to_add,
+                    template=pysql.SQL("""(nextval('seq_place'), 1, {},
+                                          %s, 'SRID=4326;POINT(%s %s)')
+                                       """).format(pysql.Literal(self.country)))

             if to_delete:
                 cur.execute("""DELETE FROM location_postcode
                                WHERE country_code = %s and postcode = any(%s)
                             """, (self.country, to_delete))
             if to_update:
             if to_delete:
                 cur.execute("""DELETE FROM location_postcode
                                WHERE country_code = %s and postcode = any(%s)
                             """, (self.country, to_delete))
             if to_update:

-                execute_values(cur,
-                               """UPDATE location_postcode
-                                  SET indexed_status = 2,
-                                      geometry = ST_SetSRID(ST_Point(v.x, v.y), 4326)
-                                  FROM (VALUES %s) AS v (pc, x, y)
-                                  WHERE country_code = '{}' and postcode = pc
-                               """.format(self.country),
-                               to_update)
+                cur.execute_values(
+                    pysql.SQL("""UPDATE location_postcode
+                                 SET indexed_status = 2,
+                                     geometry = ST_SetSRID(ST_Point(v.x, v.y), 4326)
+                                 FROM (VALUES %s) AS v (pc, x, y)
+                                 WHERE country_code = {} and postcode = pc
+                              """).format(pysql.Literal(self.country)), to_update)

 
 
     def _compute_changes(self, conn):
 
 
     def _compute_changes(self, conn):


@@ -163,17 +168,20 @@ def update_postcodes(dsn, project_dir, tokenizer):
 
             # Recompute the list of valid postcodes from placex.
             with conn.cursor(name="placex_postcodes") as cur:
 
             # Recompute the list of valid postcodes from placex.
             with conn.cursor(name="placex_postcodes") as cur:

-                cur.execute("""SELECT country_code, pc, ST_X(centroid), ST_Y(centroid)
-                               FROM (
-                                 SELECT country_code,
-                                        token_normalized_postcode(address->'postcode') as pc,
-                                        ST_Centroid(ST_Collect(ST_Centroid(geometry))) as centroid
-                                 FROM placex
-                                 WHERE address ? 'postcode' and geometry IS NOT null
-                                       and country_code is not null
-                                 GROUP BY country_code, pc) xx
-                               WHERE pc is not null
-                               ORDER BY country_code, pc""")
+                cur.execute("""
+                SELECT cc as country_code, pc, ST_X(centroid), ST_Y(centroid)
+                FROM (SELECT
+                        COALESCE(plx.country_code,
+                                 get_country_code(ST_Centroid(pl.geometry))) as cc,
+                        token_normalized_postcode(pl.address->'postcode') as pc,
+                        ST_Centroid(ST_Collect(COALESCE(plx.centroid,
+                                                        ST_Centroid(pl.geometry)))) as centroid
+                      FROM place AS pl LEFT OUTER JOIN placex AS plx
+                             ON pl.osm_id = plx.osm_id AND pl.osm_type = plx.osm_type
+                    WHERE pl.address ? 'postcode' AND pl.geometry IS NOT null
+                    GROUP BY cc, pc) xx
+                WHERE pc IS NOT null AND cc IS NOT null
+                ORDER BY country_code, pc""")

 
                 collector = None
 
 
                 collector = None
 


@@ -195,3 +203,11 @@ def update_postcodes(dsn, project_dir, tokenizer):
             conn.commit()
 
         analyzer.update_postcodes_from_db()
             conn.commit()
 
         analyzer.update_postcodes_from_db()

+
+def can_compute(dsn):
+    """
+        Check that the place table exists so that
+        postcodes can be computed.
+    """
+    with connect(dsn) as conn:
+        return conn.table_exists('place')