2 Functions for setting up and importing a new Nominatim database.
8 from pathlib import Path
11 import psycopg2.extras
13 from nominatim.db.connection import connect, get_pg_env
14 from nominatim.db import utils as db_utils
15 from nominatim.db.async_connection import DBConnection
16 from nominatim.db.sql_preprocessor import SQLPreprocessor
17 from nominatim.tools.exec_utils import run_osm2pgsql
18 from nominatim.errors import UsageError
19 from nominatim.version import POSTGRESQL_REQUIRED_VERSION, POSTGIS_REQUIRED_VERSION
21 LOG = logging.getLogger()
23 def setup_database_skeleton(dsn, data_dir, no_partitions, rouser=None):
24 """ Create a new database for Nominatim and populate it with the
25 essential extensions and data.
27 LOG.warning('Creating database')
28 create_db(dsn, rouser)
30 LOG.warning('Setting up database')
31 with connect(dsn) as conn:
32 setup_extensions(conn)
34 LOG.warning('Loading basic data')
35 import_base_data(dsn, data_dir, no_partitions)
38 def create_db(dsn, rouser=None):
39 """ Create a new database for the given DSN. Fails when the database
40 already exists or the PostgreSQL version is too old.
41 Uses `createdb` to create the database.
43 If 'rouser' is given, then the function also checks that the user
44 with that given name exists.
46 Requires superuser rights by the caller.
48 proc = subprocess.run(['createdb'], env=get_pg_env(dsn), check=False)
50 if proc.returncode != 0:
51 raise UsageError('Creating new database failed.')
53 with connect(dsn) as conn:
54 postgres_version = conn.server_version_tuple()
55 if postgres_version < POSTGRESQL_REQUIRED_VERSION:
56 LOG.fatal('Minimum supported version of Postgresql is %d.%d. '
57 'Found version %d.%d.',
58 POSTGRESQL_REQUIRED_VERSION[0], POSTGRESQL_REQUIRED_VERSION[1],
59 postgres_version[0], postgres_version[1])
60 raise UsageError('PostgreSQL server is too old.')
62 if rouser is not None:
63 with conn.cursor() as cur:
64 cnt = cur.scalar('SELECT count(*) FROM pg_user where usename = %s',
67 LOG.fatal("Web user '%s' does not exists. Create it with:\n"
68 "\n createuser %s", rouser, rouser)
69 raise UsageError('Missing read-only user.')
73 def setup_extensions(conn):
74 """ Set up all extensions needed for Nominatim. Also checks that the
75 versions of the extensions are sufficient.
77 with conn.cursor() as cur:
78 cur.execute('CREATE EXTENSION IF NOT EXISTS hstore')
79 cur.execute('CREATE EXTENSION IF NOT EXISTS postgis')
82 postgis_version = conn.postgis_version_tuple()
83 if postgis_version < POSTGIS_REQUIRED_VERSION:
84 LOG.fatal('Minimum supported version of PostGIS is %d.%d. '
85 'Found version %d.%d.',
86 POSTGIS_REQUIRED_VERSION[0], POSTGIS_REQUIRED_VERSION[1],
87 postgis_version[0], postgis_version[1])
88 raise UsageError('PostGIS version is too old.')
91 def import_base_data(dsn, sql_dir, ignore_partitions=False):
92 """ Create and populate the tables with basic static data that provides
93 the background for geocoding. Data is assumed to not yet exist.
95 db_utils.execute_file(dsn, sql_dir / 'country_name.sql')
96 db_utils.execute_file(dsn, sql_dir / 'country_osm_grid.sql.gz')
99 with connect(dsn) as conn:
100 with conn.cursor() as cur:
101 cur.execute('UPDATE country_name SET partition = 0')
105 def import_osm_data(osm_file, options, drop=False, ignore_errors=False):
106 """ Import the given OSM file. 'options' contains the list of
107 default settings for osm2pgsql.
109 options['import_file'] = osm_file
110 options['append'] = False
111 options['threads'] = 1
113 if not options['flatnode_file'] and options['osm2pgsql_cache'] == 0:
114 # Make some educated guesses about cache size based on the size
115 # of the import file and the available memory.
116 mem = psutil.virtual_memory()
117 fsize = os.stat(str(osm_file)).st_size
118 options['osm2pgsql_cache'] = int(min((mem.available + mem.cached) * 0.75,
119 fsize * 2) / 1024 / 1024) + 1
121 run_osm2pgsql(options)
123 with connect(options['dsn']) as conn:
124 if not ignore_errors:
125 with conn.cursor() as cur:
126 cur.execute('SELECT * FROM place LIMIT 1')
127 if cur.rowcount == 0:
128 raise UsageError('No data imported by osm2pgsql.')
131 conn.drop_table('planet_osm_nodes')
134 if options['flatnode_file']:
135 Path(options['flatnode_file']).unlink()
138 def create_tables(conn, config, reverse_only=False):
139 """ Create the set of basic tables.
140 When `reverse_only` is True, then the main table for searching will
141 be skipped and only reverse search is possible.
143 sql = SQLPreprocessor(conn, config)
144 sql.env.globals['db']['reverse_only'] = reverse_only
146 sql.run_sql_file(conn, 'tables.sql')
149 def create_table_triggers(conn, config):
150 """ Create the triggers for the tables. The trigger functions must already
151 have been imported with refresh.create_functions().
153 sql = SQLPreprocessor(conn, config)
154 sql.run_sql_file(conn, 'table-triggers.sql')
157 def create_partition_tables(conn, config):
158 """ Create tables that have explicit partitioning.
160 sql = SQLPreprocessor(conn, config)
161 sql.run_sql_file(conn, 'partition-tables.src.sql')
164 def truncate_data_tables(conn):
165 """ Truncate all data tables to prepare for a fresh load.
167 with conn.cursor() as cur:
168 cur.execute('TRUNCATE placex')
169 cur.execute('TRUNCATE place_addressline')
170 cur.execute('TRUNCATE location_area')
171 cur.execute('TRUNCATE location_area_country')
172 cur.execute('TRUNCATE location_property_tiger')
173 cur.execute('TRUNCATE location_property_osmline')
174 cur.execute('TRUNCATE location_postcode')
175 if conn.table_exists('search_name'):
176 cur.execute('TRUNCATE search_name')
177 cur.execute('DROP SEQUENCE IF EXISTS seq_place')
178 cur.execute('CREATE SEQUENCE seq_place start 100000')
180 cur.execute("""SELECT tablename FROM pg_tables
181 WHERE tablename LIKE 'location_road_%'""")
183 for table in [r[0] for r in list(cur)]:
184 cur.execute('TRUNCATE ' + table)
188 _COPY_COLUMNS = 'osm_type, osm_id, class, type, name, admin_level, address, extratags, geometry'
190 def load_data(dsn, threads):
191 """ Copy data into the word and placex table.
193 sel = selectors.DefaultSelector()
194 # Then copy data from place to placex in <threads - 1> chunks.
195 place_threads = max(1, threads - 1)
196 for imod in range(place_threads):
197 conn = DBConnection(dsn)
199 conn.perform("""INSERT INTO placex ({0})
200 SELECT {0} FROM place
201 WHERE osm_id % {1} = {2}
202 AND NOT (class='place' and (type='houses' or type='postcode'))
203 AND ST_IsValid(geometry)
204 """.format(_COPY_COLUMNS, place_threads, imod))
205 sel.register(conn, selectors.EVENT_READ, conn)
207 # Address interpolations go into another table.
208 conn = DBConnection(dsn)
210 conn.perform("""INSERT INTO location_property_osmline (osm_id, address, linegeo)
211 SELECT osm_id, address, geometry FROM place
212 WHERE class='place' and type='houses' and osm_type='W'
213 and ST_GeometryType(geometry) = 'ST_LineString'
215 sel.register(conn, selectors.EVENT_READ, conn)
217 # Now wait for all of them to finish.
218 todo = place_threads + 1
220 for key, _ in sel.select(1):
226 print('.', end='', flush=True)
229 with connect(dsn) as conn:
230 with conn.cursor() as cur:
231 cur.execute('ANALYSE')
234 def create_search_indices(conn, config, drop=False):
235 """ Create tables that have explicit partitioning.
238 # If index creation failed and left an index invalid, they need to be
239 # cleaned out first, so that the script recreates them.
240 with conn.cursor() as cur:
241 cur.execute("""SELECT relname FROM pg_class, pg_index
242 WHERE pg_index.indisvalid = false
243 AND pg_index.indexrelid = pg_class.oid""")
244 bad_indices = [row[0] for row in list(cur)]
245 for idx in bad_indices:
246 LOG.info("Drop invalid index %s.", idx)
247 cur.execute('DROP INDEX "{}"'.format(idx))
250 sql = SQLPreprocessor(conn, config)
252 sql.run_sql_file(conn, 'indices.sql', drop=drop)
254 def create_country_names(conn, tokenizer, languages=None):
255 """ Add default country names to search index. `languages` is a comma-
256 separated list of language codes as used in OSM. If `languages` is not
257 empty then only name translations for the given languages are added
261 languages = languages.split(',')
263 def _include_key(key):
264 return key == 'name' or \
265 (key.startswith('name:') \
266 and (not languages or key[5:] in languages))
268 with conn.cursor() as cur:
269 psycopg2.extras.register_hstore(cur)
270 cur.execute("""SELECT country_code, name FROM country_name
271 WHERE country_code is not null""")
273 with tokenizer.name_analyzer() as analyzer:
274 for code, name in cur:
275 names = {'countrycode' : code}
277 names['short_name'] = 'UK'
279 names['short_name'] = 'United States'
281 # country names (only in languages as provided)
283 names.update(((k, v) for k, v in name.items() if _include_key(k)))
285 analyzer.add_country_names(code, names)