X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/a4aba23a83b0d8b3817ca88d4556cf26dbb17706..87907916ff06741bd4627101d30e6e11b8ea1a1a:/nominatim/tools/postcodes.py?ds=sidebyside

diff --git a/nominatim/tools/postcodes.py b/nominatim/tools/postcodes.py
index 7a0a0e07..195d407e 100644
--- a/nominatim/tools/postcodes.py
+++ b/nominatim/tools/postcodes.py
@@ -5,6 +5,7 @@ of artificial postcode centroids.
 import csv
 import gzip
 import logging
+from math import isfinite
 
 from psycopg2.extras import execute_values
 
@@ -12,6 +13,17 @@ from nominatim.db.connection import connect
 
 LOG = logging.getLogger()
 
+def _to_float(num, max_value):
+    """ Convert the number in string into a float. The number is expected
+        to be in the range of [-max_value, max_value]. Otherwise rises a
+        ValueError.
+    """
+    num = float(num)
+    if not isfinite(num) or num <= -max_value or num >= max_value:
+        raise ValueError()
+
+    return num
+
 class _CountryPostcodesCollector:
     """ Collector for postcodes of a single country.
     """
@@ -35,23 +47,26 @@ class _CountryPostcodesCollector:
         self._update_from_external(analyzer, project_dir)
         to_add, to_delete, to_update = self._compute_changes(conn)
 
+        LOG.info("Processing country '%s' (%s added, %s deleted, %s updated).",
+                 self.country, len(to_add), len(to_delete), len(to_update))
+
         with conn.cursor() as cur:
             if to_add:
                 execute_values(cur,
-                               """INSERT INTO location_postcodes
-                                      (place_id, indexed_status, countrycode,
+                               """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))
             if to_delete:
-                cur.execute("""DELETE FROM location_postcodes
+                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_postcodes
+                               """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)
@@ -62,22 +77,22 @@ class _CountryPostcodesCollector:
 
     def _compute_changes(self, conn):
         """ Compute which postcodes from the collected postcodes have to be
-            added or modified and which from the location_postcodes table
+            added or modified and which from the location_postcode table
             have to be deleted.
         """
         to_update = []
         to_delete = []
         with conn.cursor() as cur:
             cur.execute("""SELECT postcode, ST_X(geometry), ST_Y(geometry)
-                           FROM location_postcodes
+                           FROM location_postcode
                            WHERE country_code = %s""",
                         (self.country, ))
             for postcode, x, y in cur:
-                oldx, oldy = self.collected.pop(postcode, (None, None))
-                if oldx is not None:
-                    dist = (x - oldx)**2 + (y - oldy)**2
-                    if dist > 0.000001:
-                        to_update.append(postcode, x, y)
+                newx, newy = self.collected.pop(postcode, (None, None))
+                if newx is not None:
+                    dist = (x - newx)**2 + (y - newy)**2
+                    if dist > 0.0000001:
+                        to_update.append((postcode, newx, newy))
                 else:
                     to_delete.append(postcode)
 
@@ -105,7 +120,8 @@ class _CountryPostcodesCollector:
                 postcode = analyzer.normalize_postcode(row['postcode'])
                 if postcode not in self.collected:
                     try:
-                        self.collected[postcode] = (float(row['lon'], float(row['lat'])))
+                        self.collected[postcode] = (_to_float(row['lon'], 180),
+                                                    _to_float(row['lat'], 90))
                     except ValueError:
                         LOG.warning("Bad coordinates %s, %s in %s country postcode file.",
                                     row['lat'], row['lon'], self.country)
@@ -139,7 +155,14 @@ def update_postcodes(dsn, project_dir, tokenizer):
     """
     with tokenizer.name_analyzer() as analyzer:
         with connect(dsn) as conn:
-            with conn.cursor("placex_postcodes") as cur:
+            # First get the list of countries that currently have postcodes.
+            # (Doing this before starting to insert, so it is fast on import.)
+            with conn.cursor() as cur:
+                cur.execute("SELECT DISTINCT country_code FROM location_postcode")
+                todo_countries = set((row[0] for row in 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,
@@ -147,6 +170,7 @@ def update_postcodes(dsn, project_dir, tokenizer):
                                         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""")
@@ -158,11 +182,16 @@ def update_postcodes(dsn, project_dir, tokenizer):
                         if collector is not None:
                             collector.commit(conn, analyzer, project_dir)
                         collector = _CountryPostcodesCollector(country)
+                        todo_countries.discard(country)
                     collector.add(postcode, x, y)
 
                 if collector is not None:
                     collector.commit(conn, analyzer, project_dir)
 
+            # Now handle any countries that are only in the postcode table.
+            for country in todo_countries:
+                _CountryPostcodesCollector(country).commit(conn, analyzer, project_dir)
+
             conn.commit()
 
-        analyzer.add_postcodes_from_db()
+        analyzer.update_postcodes_from_db()