1 # SPDX-License-Identifier: GPL-3.0-or-later
3 # This file is part of Nominatim. (https://nominatim.org)
5 # Copyright (C) 2024 by the Nominatim developer community.
6 # For a full list of authors see the git log.
8 Functions for setting up and importing a new Nominatim database.
10 from typing import Tuple, Optional, Union, Sequence, MutableMapping, Any
15 from pathlib import Path
18 from psycopg2 import sql as pysql
20 from ..errors import UsageError
21 from ..config import Configuration
22 from ..db.connection import connect, get_pg_env, Connection, server_version_tuple,\
23 postgis_version_tuple, drop_tables, table_exists, execute_scalar
24 from ..db.async_connection import DBConnection
25 from ..db.sql_preprocessor import SQLPreprocessor
26 from .exec_utils import run_osm2pgsql
27 from ..version import POSTGRESQL_REQUIRED_VERSION, POSTGIS_REQUIRED_VERSION
29 LOG = logging.getLogger()
31 def _require_version(module: str, actual: Tuple[int, int], expected: Tuple[int, int]) -> None:
32 """ Compares the version for the given module and raises an exception
33 if the actual version is too old.
36 LOG.fatal('Minimum supported version of %s is %d.%d. '
37 'Found version %d.%d.',
38 module, expected[0], expected[1], actual[0], actual[1])
39 raise UsageError(f'{module} is too old.')
42 def _require_loaded(extension_name: str, conn: Connection) -> None:
43 """ Check that the given extension is loaded. """
44 with conn.cursor() as cur:
45 cur.execute('SELECT * FROM pg_extension WHERE extname = %s', (extension_name, ))
47 LOG.fatal('Required module %s is not loaded.', extension_name)
48 raise UsageError(f'{extension_name} is not loaded.')
51 def check_existing_database_plugins(dsn: str) -> None:
52 """ Check that the database has the required plugins installed."""
53 with connect(dsn) as conn:
54 _require_version('PostgreSQL server',
55 server_version_tuple(conn),
56 POSTGRESQL_REQUIRED_VERSION)
57 _require_version('PostGIS',
58 postgis_version_tuple(conn),
59 POSTGIS_REQUIRED_VERSION)
60 _require_loaded('hstore', conn)
63 def setup_database_skeleton(dsn: str, rouser: Optional[str] = None) -> None:
64 """ Create a new database for Nominatim and populate it with the
67 The function fails when the database already exists or Postgresql or
68 PostGIS versions are too old.
70 Uses `createdb` to create the database.
72 If 'rouser' is given, then the function also checks that the user
73 with that given name exists.
75 Requires superuser rights by the caller.
77 proc = subprocess.run(['createdb'], env=get_pg_env(dsn), check=False)
79 if proc.returncode != 0:
80 raise UsageError('Creating new database failed.')
82 with connect(dsn) as conn:
83 _require_version('PostgreSQL server',
84 server_version_tuple(conn),
85 POSTGRESQL_REQUIRED_VERSION)
87 if rouser is not None:
88 cnt = execute_scalar(conn, 'SELECT count(*) FROM pg_user where usename = %s',
91 LOG.fatal("Web user '%s' does not exist. Create it with:\n"
92 "\n createuser %s", rouser, rouser)
93 raise UsageError('Missing read-only user.')
96 with conn.cursor() as cur:
97 cur.execute('CREATE EXTENSION IF NOT EXISTS hstore')
98 cur.execute('CREATE EXTENSION IF NOT EXISTS postgis')
100 postgis_version = postgis_version_tuple(conn)
101 if postgis_version[0] >= 3:
102 cur.execute('CREATE EXTENSION IF NOT EXISTS postgis_raster')
106 _require_version('PostGIS',
107 postgis_version_tuple(conn),
108 POSTGIS_REQUIRED_VERSION)
111 def import_osm_data(osm_files: Union[Path, Sequence[Path]],
112 options: MutableMapping[str, Any],
113 drop: bool = False, ignore_errors: bool = False) -> None:
114 """ Import the given OSM files. 'options' contains the list of
115 default settings for osm2pgsql.
117 options['import_file'] = osm_files
118 options['append'] = False
119 options['threads'] = 1
121 if not options['flatnode_file'] and options['osm2pgsql_cache'] == 0:
122 # Make some educated guesses about cache size based on the size
123 # of the import file and the available memory.
124 mem = psutil.virtual_memory()
126 if isinstance(osm_files, list):
127 for fname in osm_files:
128 fsize += os.stat(str(fname)).st_size
130 fsize = os.stat(str(osm_files)).st_size
131 options['osm2pgsql_cache'] = int(min((mem.available + mem.cached) * 0.75,
132 fsize * 2) / 1024 / 1024) + 1
134 run_osm2pgsql(options)
136 with connect(options['dsn']) as conn:
137 if not ignore_errors:
138 with conn.cursor() as cur:
139 cur.execute('SELECT * FROM place LIMIT 1')
140 if cur.rowcount == 0:
141 raise UsageError('No data imported by osm2pgsql.')
144 drop_tables(conn, 'planet_osm_nodes')
147 if drop and options['flatnode_file']:
148 Path(options['flatnode_file']).unlink()
151 def create_tables(conn: Connection, config: Configuration, reverse_only: bool = False) -> None:
152 """ Create the set of basic tables.
153 When `reverse_only` is True, then the main table for searching will
154 be skipped and only reverse search is possible.
156 sql = SQLPreprocessor(conn, config)
157 sql.env.globals['db']['reverse_only'] = reverse_only
159 sql.run_sql_file(conn, 'tables.sql')
162 def create_table_triggers(conn: Connection, config: Configuration) -> None:
163 """ Create the triggers for the tables. The trigger functions must already
164 have been imported with refresh.create_functions().
166 sql = SQLPreprocessor(conn, config)
167 sql.run_sql_file(conn, 'table-triggers.sql')
170 def create_partition_tables(conn: Connection, config: Configuration) -> None:
171 """ Create tables that have explicit partitioning.
173 sql = SQLPreprocessor(conn, config)
174 sql.run_sql_file(conn, 'partition-tables.src.sql')
177 def truncate_data_tables(conn: Connection) -> None:
178 """ Truncate all data tables to prepare for a fresh load.
180 with conn.cursor() as cur:
181 cur.execute('TRUNCATE placex')
182 cur.execute('TRUNCATE place_addressline')
183 cur.execute('TRUNCATE location_area')
184 cur.execute('TRUNCATE location_area_country')
185 cur.execute('TRUNCATE location_property_tiger')
186 cur.execute('TRUNCATE location_property_osmline')
187 cur.execute('TRUNCATE location_postcode')
188 if table_exists(conn, 'search_name'):
189 cur.execute('TRUNCATE search_name')
190 cur.execute('DROP SEQUENCE IF EXISTS seq_place')
191 cur.execute('CREATE SEQUENCE seq_place start 100000')
193 cur.execute("""SELECT tablename FROM pg_tables
194 WHERE tablename LIKE 'location_road_%'""")
196 for table in [r[0] for r in list(cur)]:
197 cur.execute('TRUNCATE ' + table)
202 _COPY_COLUMNS = pysql.SQL(',').join(map(pysql.Identifier,
203 ('osm_type', 'osm_id', 'class', 'type',
204 'name', 'admin_level', 'address',
205 'extratags', 'geometry')))
208 def load_data(dsn: str, threads: int) -> None:
209 """ Copy data into the word and placex table.
211 sel = selectors.DefaultSelector()
212 # Then copy data from place to placex in <threads - 1> chunks.
213 place_threads = max(1, threads - 1)
214 for imod in range(place_threads):
215 conn = DBConnection(dsn)
218 pysql.SQL("""INSERT INTO placex ({columns})
219 SELECT {columns} FROM place
220 WHERE osm_id % {total} = {mod}
221 AND NOT (class='place' and (type='houses' or type='postcode'))
222 AND ST_IsValid(geometry)
223 """).format(columns=_COPY_COLUMNS,
224 total=pysql.Literal(place_threads),
225 mod=pysql.Literal(imod)))
226 sel.register(conn, selectors.EVENT_READ, conn)
228 # Address interpolations go into another table.
229 conn = DBConnection(dsn)
231 conn.perform("""INSERT INTO location_property_osmline (osm_id, address, linegeo)
232 SELECT osm_id, address, geometry FROM place
233 WHERE class='place' and type='houses' and osm_type='W'
234 and ST_GeometryType(geometry) = 'ST_LineString'
236 sel.register(conn, selectors.EVENT_READ, conn)
238 # Now wait for all of them to finish.
239 todo = place_threads + 1
241 for key, _ in sel.select(1):
247 print('.', end='', flush=True)
250 with connect(dsn) as syn_conn:
251 with syn_conn.cursor() as cur:
252 cur.execute('ANALYSE')
255 def create_search_indices(conn: Connection, config: Configuration,
256 drop: bool = False, threads: int = 1) -> None:
257 """ Create tables that have explicit partitioning.
260 # If index creation failed and left an index invalid, they need to be
261 # cleaned out first, so that the script recreates them.
262 with conn.cursor() as cur:
263 cur.execute("""SELECT relname FROM pg_class, pg_index
264 WHERE pg_index.indisvalid = false
265 AND pg_index.indexrelid = pg_class.oid""")
266 bad_indices = [row[0] for row in list(cur)]
267 for idx in bad_indices:
268 LOG.info("Drop invalid index %s.", idx)
269 cur.execute(pysql.SQL('DROP INDEX {}').format(pysql.Identifier(idx)))
272 sql = SQLPreprocessor(conn, config)
274 sql.run_parallel_sql_file(config.get_libpq_dsn(),
275 'indices.sql', min(8, threads), drop=drop)