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')
133 if drop and options['flatnode_file']:
134 Path(options['flatnode_file']).unlink()
137 def create_tables(conn, config, reverse_only=False):
138 """ Create the set of basic tables.
139 When `reverse_only` is True, then the main table for searching will
140 be skipped and only reverse search is possible.
142 sql = SQLPreprocessor(conn, config)
143 sql.env.globals['db']['reverse_only'] = reverse_only
145 sql.run_sql_file(conn, 'tables.sql')
148 def create_table_triggers(conn, config):
149 """ Create the triggers for the tables. The trigger functions must already
150 have been imported with refresh.create_functions().
152 sql = SQLPreprocessor(conn, config)
153 sql.run_sql_file(conn, 'table-triggers.sql')
156 def create_partition_tables(conn, config):
157 """ Create tables that have explicit partitioning.
159 sql = SQLPreprocessor(conn, config)
160 sql.run_sql_file(conn, 'partition-tables.src.sql')
163 def truncate_data_tables(conn):
164 """ Truncate all data tables to prepare for a fresh load.
166 with conn.cursor() as cur:
167 cur.execute('TRUNCATE placex')
168 cur.execute('TRUNCATE place_addressline')
169 cur.execute('TRUNCATE location_area')
170 cur.execute('TRUNCATE location_area_country')
171 cur.execute('TRUNCATE location_property_tiger')
172 cur.execute('TRUNCATE location_property_osmline')
173 cur.execute('TRUNCATE location_postcode')
174 if conn.table_exists('search_name'):
175 cur.execute('TRUNCATE search_name')
176 cur.execute('DROP SEQUENCE IF EXISTS seq_place')
177 cur.execute('CREATE SEQUENCE seq_place start 100000')
179 cur.execute("""SELECT tablename FROM pg_tables
180 WHERE tablename LIKE 'location_road_%'""")
182 for table in [r[0] for r in list(cur)]:
183 cur.execute('TRUNCATE ' + table)
187 _COPY_COLUMNS = 'osm_type, osm_id, class, type, name, admin_level, address, extratags, geometry'
189 def load_data(dsn, threads):
190 """ Copy data into the word and placex table.
192 sel = selectors.DefaultSelector()
193 # Then copy data from place to placex in <threads - 1> chunks.
194 place_threads = max(1, threads - 1)
195 for imod in range(place_threads):
196 conn = DBConnection(dsn)
198 conn.perform("""INSERT INTO placex ({0})
199 SELECT {0} FROM place
200 WHERE osm_id % {1} = {2}
201 AND NOT (class='place' and (type='houses' or type='postcode'))
202 AND ST_IsValid(geometry)
203 """.format(_COPY_COLUMNS, place_threads, imod))
204 sel.register(conn, selectors.EVENT_READ, conn)
206 # Address interpolations go into another table.
207 conn = DBConnection(dsn)
209 conn.perform("""INSERT INTO location_property_osmline (osm_id, address, linegeo)
210 SELECT osm_id, address, geometry FROM place
211 WHERE class='place' and type='houses' and osm_type='W'
212 and ST_GeometryType(geometry) = 'ST_LineString'
214 sel.register(conn, selectors.EVENT_READ, conn)
216 # Now wait for all of them to finish.
217 todo = place_threads + 1
219 for key, _ in sel.select(1):
225 print('.', end='', flush=True)
228 with connect(dsn) as conn:
229 with conn.cursor() as cur:
230 cur.execute('ANALYSE')
233 def create_search_indices(conn, config, drop=False):
234 """ Create tables that have explicit partitioning.
237 # If index creation failed and left an index invalid, they need to be
238 # cleaned out first, so that the script recreates them.
239 with conn.cursor() as cur:
240 cur.execute("""SELECT relname FROM pg_class, pg_index
241 WHERE pg_index.indisvalid = false
242 AND pg_index.indexrelid = pg_class.oid""")
243 bad_indices = [row[0] for row in list(cur)]
244 for idx in bad_indices:
245 LOG.info("Drop invalid index %s.", idx)
246 cur.execute('DROP INDEX "{}"'.format(idx))
249 sql = SQLPreprocessor(conn, config)
251 sql.run_sql_file(conn, 'indices.sql', drop=drop)
253 def create_country_names(conn, tokenizer, languages=None):
254 """ Add default country names to search index. `languages` is a comma-
255 separated list of language codes as used in OSM. If `languages` is not
256 empty then only name translations for the given languages are added
260 languages = languages.split(',')
262 def _include_key(key):
263 return key == 'name' or \
264 (key.startswith('name:') \
265 and (not languages or key[5:] in languages))
267 with conn.cursor() as cur:
268 psycopg2.extras.register_hstore(cur)
269 cur.execute("""SELECT country_code, name FROM country_name
270 WHERE country_code is not null""")
272 with tokenizer.name_analyzer() as analyzer:
273 for code, name in cur:
274 names = {'countrycode' : code}
276 names['short_name'] = 'UK'
278 names['short_name'] = 'United States'
280 # country names (only in languages as provided)
282 names.update(((k, v) for k, v in name.items() if _include_key(k)))
284 analyzer.add_country_names(code, names)