speed up reverse lookup of place nodes

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

diff --git a/nominatim/tools/database_import.py b/nominatim/tools/database_import.py
index 38635c34920131c889ea0549d84d4cc05a0157b5..cb620d41fb8f31126fe69a622bf14130e38494d1 100644 (file)
--- a/nominatim/tools/database_import.py
+++ b/nominatim/tools/database_import.py
@@ -1,6 +1,13 @@
+# 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 setting up and importing a new Nominatim database.
 """
+from typing import Tuple, Optional, Union, Sequence, MutableMapping, Any
 import logging
 import os
 import selectors
@@ -10,7 +17,8 @@ from pathlib import Path
 import psutil
 from psycopg2 import sql as pysql
 
-from nominatim.db.connection import connect, get_pg_env
+from nominatim.config import Configuration
+from nominatim.db.connection import connect, get_pg_env, Connection
 from nominatim.db.async_connection import DBConnection
 from nominatim.db.sql_preprocessor import SQLPreprocessor
 from nominatim.tools.exec_utils import run_osm2pgsql
@@ -19,7 +27,7 @@ from nominatim.version import POSTGRESQL_REQUIRED_VERSION, POSTGIS_REQUIRED_VERS
 
 LOG = logging.getLogger()
 
-def _require_version(module, actual, expected):
+def _require_version(module: str, actual: Tuple[int, int], expected: Tuple[int, int]) -> None:
     """ Compares the version for the given module and raises an exception
         if the actual version is too old.
     """
@@ -30,7 +38,7 @@ def _require_version(module, actual, expected):
         raise UsageError(f'{module} is too old.')
 
 
-def setup_database_skeleton(dsn, rouser=None):
+def setup_database_skeleton(dsn: str, rouser: Optional[str] = None) -> None:
     """ Create a new database for Nominatim and populate it with the
         essential extensions.
 
@@ -59,7 +67,7 @@ def setup_database_skeleton(dsn, rouser=None):
                 cnt = cur.scalar('SELECT count(*) FROM pg_user where usename = %s',
                                  (rouser, ))
                 if cnt == 0:
-                    LOG.fatal("Web user '%s' does not exists. Create it with:\n"
+                    LOG.fatal("Web user '%s' does not exist. Create it with:\n"
                               "\n      createuser %s", rouser, rouser)
                     raise UsageError('Missing read-only user.')
 
@@ -67,6 +75,11 @@ def setup_database_skeleton(dsn, rouser=None):
         with conn.cursor() as cur:
             cur.execute('CREATE EXTENSION IF NOT EXISTS hstore')
             cur.execute('CREATE EXTENSION IF NOT EXISTS postgis')
+
+            postgis_version = conn.postgis_version_tuple()
+            if postgis_version[0] >= 3:
+                cur.execute('CREATE EXTENSION IF NOT EXISTS postgis_raster')
+
         conn.commit()
 
         _require_version('PostGIS',
@@ -74,7 +87,9 @@ def setup_database_skeleton(dsn, rouser=None):
                          POSTGIS_REQUIRED_VERSION)
 
 
-def import_osm_data(osm_files, options, drop=False, ignore_errors=False):
+def import_osm_data(osm_files: Union[Path, Sequence[Path]],
+                    options: MutableMapping[str, Any],
+                    drop: bool = False, ignore_errors: bool = False) -> None:
     """ Import the given OSM files. 'options' contains the list of
         default settings for osm2pgsql.
     """
@@ -111,7 +126,7 @@ def import_osm_data(osm_files, options, drop=False, ignore_errors=False):
         Path(options['flatnode_file']).unlink()
 
 
-def create_tables(conn, config, reverse_only=False):
+def create_tables(conn: Connection, config: Configuration, reverse_only: bool = False) -> None:
     """ Create the set of basic tables.
         When `reverse_only` is True, then the main table for searching will
         be skipped and only reverse search is possible.
@@ -122,7 +137,7 @@ def create_tables(conn, config, reverse_only=False):
     sql.run_sql_file(conn, 'tables.sql')
 
 
-def create_table_triggers(conn, config):
+def create_table_triggers(conn: Connection, config: Configuration) -> None:
     """ Create the triggers for the tables. The trigger functions must already
         have been imported with refresh.create_functions().
     """
@@ -130,14 +145,14 @@ def create_table_triggers(conn, config):
     sql.run_sql_file(conn, 'table-triggers.sql')
 
 
-def create_partition_tables(conn, config):
+def create_partition_tables(conn: Connection, config: Configuration) -> None:
     """ Create tables that have explicit partitioning.
     """
     sql = SQLPreprocessor(conn, config)
     sql.run_sql_file(conn, 'partition-tables.src.sql')
 
 
-def truncate_data_tables(conn):
+def truncate_data_tables(conn: Connection) -> None:
     """ Truncate all data tables to prepare for a fresh load.
     """
     with conn.cursor() as cur:
@@ -168,7 +183,7 @@ _COPY_COLUMNS = pysql.SQL(',').join(map(pysql.Identifier,
                                          'extratags', 'geometry')))
 
 
-def load_data(dsn, threads):
+def load_data(dsn: str, threads: int) -> None:
     """ Copy data into the word and placex table.
     """
     sel = selectors.DefaultSelector()
@@ -210,12 +225,13 @@ def load_data(dsn, threads):
         print('.', end='', flush=True)
     print('\n')
 
-    with connect(dsn) as conn:
-        with conn.cursor() as cur:
+    with connect(dsn) as syn_conn:
+        with syn_conn.cursor() as cur:
             cur.execute('ANALYSE')
 
 
-def create_search_indices(conn, config, drop=False):
+def create_search_indices(conn: Connection, config: Configuration,
+                          drop: bool = False, threads: int = 1) -> None:
     """ Create tables that have explicit partitioning.
     """
 
@@ -228,9 +244,10 @@ def create_search_indices(conn, config, drop=False):
         bad_indices = [row[0] for row in list(cur)]
         for idx in bad_indices:
             LOG.info("Drop invalid index %s.", idx)
-            cur.execute('DROP INDEX "{}"'.format(idx))
+            cur.execute(pysql.SQL('DROP INDEX {}').format(pysql.Identifier(idx)))
     conn.commit()
 
     sql = SQLPreprocessor(conn, config)
 
-    sql.run_sql_file(conn, 'indices.sql', drop=drop)
+    sql.run_parallel_sql_file(config.get_libpq_dsn(),
+                              'indices.sql', min(8, threads), drop=drop)