1 # SPDX-License-Identifier: GPL-2.0-only
3 # This file is part of Nominatim. (https://nominatim.org)
5 # Copyright (C) 2022 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 nominatim.config import Configuration
21 from nominatim.db.connection import connect, get_pg_env, Connection
22 from nominatim.db.async_connection import DBConnection
23 from nominatim.db.sql_preprocessor import SQLPreprocessor
24 from nominatim.tools.exec_utils import run_osm2pgsql
25 from nominatim.errors import UsageError
26 from nominatim.version import POSTGRESQL_REQUIRED_VERSION, POSTGIS_REQUIRED_VERSION
28 LOG = logging.getLogger()
30 def _require_version(module: str, actual: Tuple[int, int], expected: Tuple[int, int]) -> None:
31 """ Compares the version for the given module and raises an exception
32 if the actual version is too old.
35 LOG.fatal('Minimum supported version of %s is %d.%d. '
36 'Found version %d.%d.',
37 module, expected[0], expected[1], actual[0], actual[1])
38 raise UsageError(f'{module} is too old.')
41 def setup_database_skeleton(dsn: str, rouser: Optional[str] = None) -> None:
42 """ Create a new database for Nominatim and populate it with the
45 The function fails when the database already exists or Postgresql or
46 PostGIS versions are too old.
48 Uses `createdb` to create the database.
50 If 'rouser' is given, then the function also checks that the user
51 with that given name exists.
53 Requires superuser rights by the caller.
55 proc = subprocess.run(['createdb'], env=get_pg_env(dsn), check=False)
57 if proc.returncode != 0:
58 raise UsageError('Creating new database failed.')
60 with connect(dsn) as conn:
61 _require_version('PostgreSQL server',
62 conn.server_version_tuple(),
63 POSTGRESQL_REQUIRED_VERSION)
65 if rouser is not None:
66 with conn.cursor() as cur:
67 cnt = cur.scalar('SELECT count(*) FROM pg_user where usename = %s',
70 LOG.fatal("Web user '%s' does not exist. Create it with:\n"
71 "\n createuser %s", rouser, rouser)
72 raise UsageError('Missing read-only user.')
75 with conn.cursor() as cur:
76 cur.execute('CREATE EXTENSION IF NOT EXISTS hstore')
77 cur.execute('CREATE EXTENSION IF NOT EXISTS postgis')
78 cur.execute('CREATE EXTENSION IF NOT EXISTS postgis_raster')
81 _require_version('PostGIS',
82 conn.postgis_version_tuple(),
83 POSTGIS_REQUIRED_VERSION)
86 def import_osm_data(osm_files: Union[Path, Sequence[Path]],
87 options: MutableMapping[str, Any],
88 drop: bool = False, ignore_errors: bool = False) -> None:
89 """ Import the given OSM files. 'options' contains the list of
90 default settings for osm2pgsql.
92 options['import_file'] = osm_files
93 options['append'] = False
94 options['threads'] = 1
96 if not options['flatnode_file'] and options['osm2pgsql_cache'] == 0:
97 # Make some educated guesses about cache size based on the size
98 # of the import file and the available memory.
99 mem = psutil.virtual_memory()
101 if isinstance(osm_files, list):
102 for fname in osm_files:
103 fsize += os.stat(str(fname)).st_size
105 fsize = os.stat(str(osm_files)).st_size
106 options['osm2pgsql_cache'] = int(min((mem.available + mem.cached) * 0.75,
107 fsize * 2) / 1024 / 1024) + 1
109 run_osm2pgsql(options)
111 with connect(options['dsn']) as conn:
112 if not ignore_errors:
113 with conn.cursor() as cur:
114 cur.execute('SELECT * FROM place LIMIT 1')
115 if cur.rowcount == 0:
116 raise UsageError('No data imported by osm2pgsql.')
119 conn.drop_table('planet_osm_nodes')
121 if drop and options['flatnode_file']:
122 Path(options['flatnode_file']).unlink()
125 def create_tables(conn: Connection, config: Configuration, reverse_only: bool = False) -> None:
126 """ Create the set of basic tables.
127 When `reverse_only` is True, then the main table for searching will
128 be skipped and only reverse search is possible.
130 sql = SQLPreprocessor(conn, config)
131 sql.env.globals['db']['reverse_only'] = reverse_only
133 sql.run_sql_file(conn, 'tables.sql')
136 def create_table_triggers(conn: Connection, config: Configuration) -> None:
137 """ Create the triggers for the tables. The trigger functions must already
138 have been imported with refresh.create_functions().
140 sql = SQLPreprocessor(conn, config)
141 sql.run_sql_file(conn, 'table-triggers.sql')
144 def create_partition_tables(conn: Connection, config: Configuration) -> None:
145 """ Create tables that have explicit partitioning.
147 sql = SQLPreprocessor(conn, config)
148 sql.run_sql_file(conn, 'partition-tables.src.sql')
151 def truncate_data_tables(conn: Connection) -> None:
152 """ Truncate all data tables to prepare for a fresh load.
154 with conn.cursor() as cur:
155 cur.execute('TRUNCATE placex')
156 cur.execute('TRUNCATE place_addressline')
157 cur.execute('TRUNCATE location_area')
158 cur.execute('TRUNCATE location_area_country')
159 cur.execute('TRUNCATE location_property_tiger')
160 cur.execute('TRUNCATE location_property_osmline')
161 cur.execute('TRUNCATE location_postcode')
162 if conn.table_exists('search_name'):
163 cur.execute('TRUNCATE search_name')
164 cur.execute('DROP SEQUENCE IF EXISTS seq_place')
165 cur.execute('CREATE SEQUENCE seq_place start 100000')
167 cur.execute("""SELECT tablename FROM pg_tables
168 WHERE tablename LIKE 'location_road_%'""")
170 for table in [r[0] for r in list(cur)]:
171 cur.execute('TRUNCATE ' + table)
176 _COPY_COLUMNS = pysql.SQL(',').join(map(pysql.Identifier,
177 ('osm_type', 'osm_id', 'class', 'type',
178 'name', 'admin_level', 'address',
179 'extratags', 'geometry')))
182 def load_data(dsn: str, threads: int) -> None:
183 """ Copy data into the word and placex table.
185 sel = selectors.DefaultSelector()
186 # Then copy data from place to placex in <threads - 1> chunks.
187 place_threads = max(1, threads - 1)
188 for imod in range(place_threads):
189 conn = DBConnection(dsn)
192 pysql.SQL("""INSERT INTO placex ({columns})
193 SELECT {columns} FROM place
194 WHERE osm_id % {total} = {mod}
195 AND NOT (class='place' and (type='houses' or type='postcode'))
196 AND ST_IsValid(geometry)
197 """).format(columns=_COPY_COLUMNS,
198 total=pysql.Literal(place_threads),
199 mod=pysql.Literal(imod)))
200 sel.register(conn, selectors.EVENT_READ, conn)
202 # Address interpolations go into another table.
203 conn = DBConnection(dsn)
205 conn.perform("""INSERT INTO location_property_osmline (osm_id, address, linegeo)
206 SELECT osm_id, address, geometry FROM place
207 WHERE class='place' and type='houses' and osm_type='W'
208 and ST_GeometryType(geometry) = 'ST_LineString'
210 sel.register(conn, selectors.EVENT_READ, conn)
212 # Now wait for all of them to finish.
213 todo = place_threads + 1
215 for key, _ in sel.select(1):
221 print('.', end='', flush=True)
224 with connect(dsn) as syn_conn:
225 with syn_conn.cursor() as cur:
226 cur.execute('ANALYSE')
229 def create_search_indices(conn: Connection, config: Configuration,
230 drop: bool = False, threads: int = 1) -> None:
231 """ Create tables that have explicit partitioning.
234 # If index creation failed and left an index invalid, they need to be
235 # cleaned out first, so that the script recreates them.
236 with conn.cursor() as cur:
237 cur.execute("""SELECT relname FROM pg_class, pg_index
238 WHERE pg_index.indisvalid = false
239 AND pg_index.indexrelid = pg_class.oid""")
240 bad_indices = [row[0] for row in list(cur)]
241 for idx in bad_indices:
242 LOG.info("Drop invalid index %s.", idx)
243 cur.execute(pysql.SQL('DROP INDEX {}').format(pysql.Identifier(idx)))
246 sql = SQLPreprocessor(conn, config)
248 sql.run_parallel_sql_file(config.get_libpq_dsn(),
249 'indices.sql', min(8, threads), drop=drop)
252 def import_osm_views_geotiff():
253 """Import OSM views GeoTIFF file"""
254 subprocess.run("raster2pgsql -s 4326 -I -C -t 100x100 -e osmviews.tiff public.osmviews | psql nominatim", shell=True, check=True)