optimize indexes for interpolation lines

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

diff --git a/nominatim/tools/migration.py b/nominatim/tools/migration.py
index 5484834182d876f540eb919b605abff458bbabc0..94058f334e94ef9954e0f6ea15a0bbbafd875d9f 100644 (file)
--- a/nominatim/tools/migration.py
+++ b/nominatim/tools/migration.py
@@ -1,13 +1,20 @@
+# 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.
 """
 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
+from nominatim.tokenizer import factory as tokenizer_factory
+from nominatim.errors import UsageError
 
 LOG = logging.getLogger()
 
@@ -25,7 +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)
@@ -43,11 +50,14 @@ 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:
             LOG.warning('Updating SQL functions.')
-            refresh.create_functions(conn, config, paths.sqllib_dir)
+            refresh.create_functions(conn, config)
+            tokenizer = tokenizer_factory.get_tokenizer_for_db(config)
+            tokenizer.update_sql_functions(config)
 
         properties.set_property(conn, 'database_version',
                                 '{0[0]}.{0[1]}.{0[2]}-{0[3]}'.format(NOMINATIM_VERSION))
@@ -92,6 +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
 
@@ -108,17 +119,6 @@ def import_status_timestamp_change(conn, **_):
                        TYPE timestamp with time zone;""")
 
 
-@_migration(3, 5, 0, 99)
-def install_database_module_in_project_directory(conn, config, paths, **_):
-    """ Install database module in project directory.
-
-        The database module needs to be present in the project directory
-        since those were introduced.
-    """
-    database_import.install_module(paths.module_dir, paths.project_dir,
-                                   config.DATABASE_MODULE_PATH, conn=conn)
-
-
 @_migration(3, 5, 0, 99)
 def add_nominatim_property_table(conn, config, **_):
     """ Add nominatim_property table.
@@ -137,6 +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)
@@ -146,7 +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;
@@ -173,3 +177,42 @@ def switch_placenode_geometry_index(conn, **_):
                               and class = 'place' and type != 'postcode'
                               and linked_place_id is null""")
         cur.execute(""" DROP INDEX IF EXISTS idx_placex_adminname """)
+
+
+@_migration(3, 7, 0, 1)
+def install_legacy_tokenizer(conn, config, **_):
+    """ Setup legacy tokenizer.
+
+        If no other tokenizer has been configured yet, then create the
+        configuration for the backwards-compatible legacy tokenizer
+    """
+    if properties.get_property(conn, 'tokenizer') is None:
+        with conn.cursor() as cur:
+            for table in ('placex', 'location_property_osmline'):
+                has_column = cur.scalar("""SELECT count(*) FROM information_schema.columns
+                                           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))
+        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) """)