X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/a73711f3cd5e4256ca7808dcca8f6fdb59fa716f..c50c534d19889d7cdea46049d1214a0081a8dcb1:/nominatim/tools/migration.py

diff --git a/nominatim/tools/migration.py b/nominatim/tools/migration.py
index c8011eeb..dc6dfeca 100644
--- a/nominatim/tools/migration.py
+++ b/nominatim/tools/migration.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 database migration to newer software versions.
 """
@@ -26,7 +32,7 @@ def migrate(config, paths):
 
         if db_version_str is not None:
             parts = db_version_str.split('.')
-            db_version = tuple([int(x) for x in parts[:2] + parts[2].split('-')])
+            db_version = tuple(int(x) for x in parts[:2] + parts[2].split('-'))
 
             if db_version == NOMINATIM_VERSION:
                 LOG.warning("Database already at latest version (%s)", db_version_str)
@@ -44,6 +50,7 @@ def migrate(config, paths):
                             '{0[0]}.{0[1]}.{0[2]}-{0[3]}'.format(version))
                 kwargs = dict(conn=conn, config=config, paths=paths)
                 func(**kwargs)
+                conn.commit()
                 has_run_migration = True
 
         if has_run_migration:
@@ -95,6 +102,7 @@ def _migration(major, minor, patch=0, dbpatch=0):
     """
     def decorator(func):
         _MIGRATION_FUNCTIONS.append(((major, minor, patch, dbpatch), func))
+        return func
 
     return decorator
 
@@ -129,6 +137,9 @@ def change_housenumber_transliteration(conn, **_):
 
         The database schema switched from saving raw housenumbers in
         placex.housenumber to saving transliterated ones.
+
+        Note: the function create_housenumber_id() has been dropped in later
+              versions.
     """
     with conn.cursor() as cur:
         cur.execute("""CREATE OR REPLACE FUNCTION create_housenumber_id(housenumber TEXT)
@@ -138,7 +149,8 @@ def change_housenumber_transliteration(conn, **_):
                        BEGIN
                          SELECT array_to_string(array_agg(trans), ';')
                            INTO normtext
-                           FROM (SELECT lookup_word as trans, getorcreate_housenumber_id(lookup_word)
+                           FROM (SELECT lookup_word as trans,
+                                        getorcreate_housenumber_id(lookup_word)
                                  FROM (SELECT make_standard_name(h) as lookup_word
                                        FROM regexp_split_to_table(housenumber, '[,;]') h) x) y;
                          return normtext;
@@ -181,9 +193,81 @@ def install_legacy_tokenizer(conn, config, **_):
                                            WHERE table_name = %s
                                            and column_name = 'token_info'""",
                                         (table, ))
-            if has_column == 0:
-                cur.execute('ALTER TABLE {} ADD COLUMN token_info JSONB'.format(table))
+                if has_column == 0:
+                    cur.execute('ALTER TABLE {} ADD COLUMN token_info JSONB'.format(table))
         tokenizer = tokenizer_factory.create_tokenizer(config, init_db=False,
                                                        module_name='legacy')
 
         tokenizer.migrate_database(config)
+
+
+@_migration(4, 0, 99, 0)
+def create_tiger_housenumber_index(conn, **_):
+    """ Create idx_location_property_tiger_parent_place_id with included
+        house number.
+
+        The inclusion is needed for efficient lookup of housenumbers in
+        full address searches.
+    """
+    if conn.server_version_tuple() >= (11, 0, 0):
+        with conn.cursor() as cur:
+            cur.execute(""" CREATE INDEX IF NOT EXISTS
+                                idx_location_property_tiger_housenumber_migrated
+                            ON location_property_tiger
+                            USING btree(parent_place_id)
+                            INCLUDE (startnumber, endnumber) """)
+
+
+@_migration(4, 0, 99, 1)
+def create_interpolation_index_on_place(conn, **_):
+    """ Create idx_place_interpolations for lookup of interpolation lines
+        on updates.
+    """
+    with conn.cursor() as cur:
+        cur.execute("""CREATE INDEX IF NOT EXISTS idx_place_interpolations
+                       ON place USING gist(geometry)
+                       WHERE osm_type = 'W' and address ? 'interpolation'""")
+
+
+@_migration(4, 0, 99, 2)
+def add_step_column_for_interpolation(conn, **_):
+    """ Add a new column 'step' to the interpolations table.
+
+        Also convers the data into the stricter format which requires that
+        startnumbers comply with the odd/even requirements.
+    """
+    with conn.cursor() as cur:
+        # Mark invalid all interpolations with no intermediate numbers.
+        cur.execute("""UPDATE location_property_osmline SET startnumber = null
+                       WHERE endnumber - startnumber <= 1 """)
+        # Align the start numbers where odd/even does not match.
+        cur.execute("""UPDATE location_property_osmline
+                       SET startnumber = startnumber + 1,
+                           linegeo = ST_LineSubString(linegeo,
+                                                      1.0 / (endnumber - startnumber)::float,
+                                                      1)
+                       WHERE (interpolationtype = 'odd' and startnumber % 2 = 0)
+                              or (interpolationtype = 'even' and startnumber % 2 = 1)
+                    """)
+        # Mark invalid odd/even interpolations with no intermediate numbers.
+        cur.execute("""UPDATE location_property_osmline SET startnumber = null
+                       WHERE interpolationtype in ('odd', 'even')
+                             and endnumber - startnumber = 2""")
+        # Finally add the new column and populate it.
+        cur.execute("ALTER TABLE location_property_osmline ADD COLUMN step SMALLINT")
+        cur.execute("""UPDATE location_property_osmline
+                         SET step = CASE WHEN interpolationtype = 'all'
+                                         THEN 1 ELSE 2 END
+                    """)
+
+
+@_migration(4, 0, 99, 3)
+def add_step_column_for_tiger(conn, **_):
+    """ Add a new column 'step' to the tiger data table.
+    """
+    with conn.cursor() as cur:
+        cur.execute("ALTER TABLE location_property_tiger ADD COLUMN step SMALLINT")
+        cur.execute("""UPDATE location_property_tiger
+                         SET step = CASE WHEN interpolationtype = 'all'
+                                         THEN 1 ELSE 2 END
+                    """)