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 Implementation of the 'import' subcommand.
11 from pathlib import Path
15 from nominatim.db.connection import connect
16 from nominatim.db import status, properties
17 from nominatim.version import version_str
19 # Do not repeat documentation of subcommand classes.
20 # pylint: disable=C0111
21 # Using non-top-level imports to avoid eventually unused imports.
22 # pylint: disable=C0415
24 LOG = logging.getLogger()
28 Create a new Nominatim database from an OSM file.
30 This sub-command sets up a new Nominatim database from scratch starting
31 with creating a new database in Postgresql. The user running this command
32 needs superuser rights on the database.
37 group_name = parser.add_argument_group('Required arguments')
38 group = group_name.add_mutually_exclusive_group(required=True)
39 group.add_argument('--osm-file', metavar='FILE', action='append',
40 help='OSM file to be imported'
41 ' (repeat for importing multiple files)')
42 group.add_argument('--continue', dest='continue_at',
43 choices=['load-data', 'indexing', 'db-postprocess'],
44 help='Continue an import that was interrupted')
45 group = parser.add_argument_group('Optional arguments')
46 group.add_argument('--osm2pgsql-cache', metavar='SIZE', type=int,
47 help='Size of cache to be used by osm2pgsql (in MB)')
48 group.add_argument('--reverse-only', action='store_true',
49 help='Do not create tables and indexes for searching')
50 group.add_argument('--no-partitions', action='store_true',
51 help=("Do not partition search indices "
52 "(speeds up import of single country extracts)"))
53 group.add_argument('--no-updates', action='store_true',
54 help="Do not keep tables that are only needed for "
55 "updating the database later")
56 group.add_argument('--offline', action='store_true',
57 help="Do not attempt to load any additional data from the internet")
58 group = parser.add_argument_group('Expert options')
59 group.add_argument('--ignore-errors', action='store_true',
60 help='Continue import even when errors in SQL are present')
61 group.add_argument('--index-noanalyse', action='store_true',
62 help='Do not perform analyse operations during index (expert only)')
67 from ..tools import database_import, refresh, postcodes, freeze, country_info
68 from ..indexer.indexer import Indexer
70 country_info.setup_country_config(args.config)
72 if args.continue_at is None:
73 files = args.get_osm_file_list()
75 LOG.warning('Creating database')
76 database_import.setup_database_skeleton(args.config.get_libpq_dsn(),
77 rouser=args.config.DATABASE_WEBUSER)
79 LOG.warning('Setting up country tables')
80 country_info.setup_country_tables(args.config.get_libpq_dsn(),
84 LOG.warning('Importing OSM data file')
85 database_import.import_osm_data(files,
86 args.osm2pgsql_options(0, 1),
88 ignore_errors=args.ignore_errors)
90 SetupAll._setup_tables(args.config, args.reverse_only)
92 LOG.warning('Importing wikipedia importance data')
93 data_path = Path(args.config.WIKIPEDIA_DATA_PATH or args.project_dir)
94 if refresh.import_wikipedia_articles(args.config.get_libpq_dsn(),
96 LOG.error('Wikipedia importance dump file not found. '
97 'Will be using default importances.')
99 if args.continue_at is None or args.continue_at == 'load-data':
100 LOG.warning('Initialise tables')
101 with connect(args.config.get_libpq_dsn()) as conn:
102 database_import.truncate_data_tables(conn)
104 LOG.warning('Load data into placex table')
105 database_import.load_data(args.config.get_libpq_dsn(),
106 args.threads or psutil.cpu_count() or 1)
108 LOG.warning("Setting up tokenizer")
109 tokenizer = SetupAll._get_tokenizer(args.continue_at, args.config)
111 if args.continue_at is None or args.continue_at == 'load-data':
112 LOG.warning('Calculate postcodes')
113 postcodes.update_postcodes(args.config.get_libpq_dsn(),
114 args.project_dir, tokenizer)
116 if args.continue_at is None or args.continue_at in ('load-data', 'indexing'):
117 if args.continue_at is not None and args.continue_at != 'load-data':
118 with connect(args.config.get_libpq_dsn()) as conn:
119 SetupAll._create_pending_index(conn, args.config.TABLESPACE_ADDRESS_INDEX)
120 LOG.warning('Indexing places')
121 indexer = Indexer(args.config.get_libpq_dsn(), tokenizer,
122 args.threads or psutil.cpu_count() or 1)
123 indexer.index_full(analyse=not args.index_noanalyse)
125 LOG.warning('Post-process tables')
126 with connect(args.config.get_libpq_dsn()) as conn:
127 database_import.create_search_indices(conn, args.config,
128 drop=args.no_updates)
129 LOG.warning('Create search index for default country names.')
130 country_info.create_country_names(conn, tokenizer,
131 args.config.get_str_list('LANGUAGES'))
133 freeze.drop_update_tables(conn)
134 tokenizer.finalize_import(args.config)
136 LOG.warning('Recompute word counts')
137 tokenizer.update_statistics()
139 webdir = args.project_dir / 'website'
140 LOG.warning('Setup website at %s', webdir)
141 with connect(args.config.get_libpq_dsn()) as conn:
142 refresh.setup_website(webdir, args.config, conn)
144 SetupAll._finalize_database(args.config.get_libpq_dsn(), args.offline)
150 def _setup_tables(config, reverse_only):
151 """ Set up the basic database layout: tables, indexes and functions.
153 from ..tools import database_import, refresh
155 with connect(config.get_libpq_dsn()) as conn:
156 LOG.warning('Create functions (1st pass)')
157 refresh.create_functions(conn, config, False, False)
158 LOG.warning('Create tables')
159 database_import.create_tables(conn, config, reverse_only=reverse_only)
160 refresh.load_address_levels_from_config(conn, config)
161 LOG.warning('Create functions (2nd pass)')
162 refresh.create_functions(conn, config, False, False)
163 LOG.warning('Create table triggers')
164 database_import.create_table_triggers(conn, config)
165 LOG.warning('Create partition tables')
166 database_import.create_partition_tables(conn, config)
167 LOG.warning('Create functions (3rd pass)')
168 refresh.create_functions(conn, config, False, False)
172 def _get_tokenizer(continue_at, config):
173 """ Set up a new tokenizer or load an already initialised one.
175 from ..tokenizer import factory as tokenizer_factory
177 if continue_at is None or continue_at == 'load-data':
178 # (re)initialise the tokenizer data
179 return tokenizer_factory.create_tokenizer(config)
181 # just load the tokenizer
182 return tokenizer_factory.get_tokenizer_for_db(config)
185 def _create_pending_index(conn, tablespace):
186 """ Add a supporting index for finding places still to be indexed.
188 This index is normally created at the end of the import process
189 for later updates. When indexing was partially done, then this
190 index can greatly improve speed going through already indexed data.
192 if conn.index_exists('idx_placex_pendingsector'):
195 with conn.cursor() as cur:
196 LOG.warning('Creating support index')
198 tablespace = 'TABLESPACE ' + tablespace
199 cur.execute(f"""CREATE INDEX idx_placex_pendingsector
200 ON placex USING BTREE (rank_address,geometry_sector)
201 {tablespace} WHERE indexed_status > 0
207 def _finalize_database(dsn, offline):
208 """ Determine the database date and set the status accordingly.
210 with connect(dsn) as conn:
213 dbdate = status.compute_database_date(conn)
214 status.set_status(conn, dbdate)
215 LOG.info('Database is at %s.', dbdate)
216 except Exception as exc: # pylint: disable=broad-except
217 LOG.error('Cannot determine date of database: %s', exc)
219 properties.set_property(conn, 'database_version', version_str())