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.
10 from typing import Optional
13 from pathlib import Path
17 from nominatim.config import Configuration
18 from nominatim.db.connection import connect, Connection
19 from nominatim.db import status, properties
20 from nominatim.tokenizer.base import AbstractTokenizer
21 from nominatim.version import version_str
22 from nominatim.clicmd.args import NominatimArgs
23 from nominatim.errors import UsageError
25 # Do not repeat documentation of subcommand classes.
26 # pylint: disable=C0111
27 # Using non-top-level imports to avoid eventually unused imports.
28 # pylint: disable=C0415
30 LOG = logging.getLogger()
34 Create a new Nominatim database from an OSM file.
36 This sub-command sets up a new Nominatim database from scratch starting
37 with creating a new database in Postgresql. The user running this command
38 needs superuser rights on the database.
41 def add_args(self, parser: argparse.ArgumentParser) -> None:
42 group_name = parser.add_argument_group('Required arguments')
43 group1 = group_name.add_mutually_exclusive_group(required=True)
44 group1.add_argument('--osm-file', metavar='FILE', action='append',
45 help='OSM file to be imported'
46 ' (repeat for importing multiple files)')
47 group1.add_argument('--continue', dest='continue_at',
48 choices=['load-data', 'indexing', 'db-postprocess'],
49 help='Continue an import that was interrupted')
50 group2 = parser.add_argument_group('Optional arguments')
51 group2.add_argument('--osm2pgsql-cache', metavar='SIZE', type=int,
52 help='Size of cache to be used by osm2pgsql (in MB)')
53 group2.add_argument('--reverse-only', action='store_true',
54 help='Do not create tables and indexes for searching')
55 group2.add_argument('--no-partitions', action='store_true',
56 help=("Do not partition search indices "
57 "(speeds up import of single country extracts)"))
58 group2.add_argument('--no-updates', action='store_true',
59 help="Do not keep tables that are only needed for "
60 "updating the database later")
61 group2.add_argument('--offline', action='store_true',
62 help="Do not attempt to load any additional data from the internet")
63 group3 = parser.add_argument_group('Expert options')
64 group3.add_argument('--ignore-errors', action='store_true',
65 help='Continue import even when errors in SQL are present')
66 group3.add_argument('--index-noanalyse', action='store_true',
67 help='Do not perform analyse operations during index (expert only)')
70 def run(self, args: NominatimArgs) -> int: # pylint: disable=too-many-statements
71 from ..data import country_info
72 from ..tools import database_import, refresh, postcodes, freeze
73 from ..indexer.indexer import Indexer
75 country_info.setup_country_config(args.config)
77 if args.continue_at is None:
78 files = args.get_osm_file_list()
80 raise UsageError("No input files (use --osm-file).")
82 LOG.warning('Creating database')
83 database_import.setup_database_skeleton(args.config.get_libpq_dsn(),
84 rouser=args.config.DATABASE_WEBUSER)
86 LOG.warning('Setting up country tables')
87 country_info.setup_country_tables(args.config.get_libpq_dsn(),
91 LOG.warning('Importing OSM data file')
92 database_import.import_osm_data(files,
93 args.osm2pgsql_options(0, 1),
95 ignore_errors=args.ignore_errors)
97 self._setup_tables(args.config, args.reverse_only)
99 LOG.warning('Importing wikipedia importance data')
100 data_path = Path(args.config.WIKIPEDIA_DATA_PATH or args.project_dir)
101 if refresh.import_wikipedia_articles(args.config.get_libpq_dsn(),
103 LOG.error('Wikipedia importance dump file not found. '
104 'Will be using default importances.')
106 if args.continue_at is None or args.continue_at == 'load-data':
107 LOG.warning('Initialise tables')
108 with connect(args.config.get_libpq_dsn()) as conn:
109 database_import.truncate_data_tables(conn)
111 LOG.warning('Load data into placex table')
112 database_import.load_data(args.config.get_libpq_dsn(),
113 args.threads or psutil.cpu_count() or 1)
115 LOG.warning("Setting up tokenizer")
116 tokenizer = self._get_tokenizer(args.continue_at, args.config)
118 if args.continue_at is None or args.continue_at == 'load-data':
119 LOG.warning('Calculate postcodes')
120 postcodes.update_postcodes(args.config.get_libpq_dsn(),
121 args.project_dir, tokenizer)
123 if args.continue_at is None or args.continue_at in ('load-data', 'indexing'):
124 if args.continue_at is not None and args.continue_at != 'load-data':
125 with connect(args.config.get_libpq_dsn()) as conn:
126 self._create_pending_index(conn, args.config.TABLESPACE_ADDRESS_INDEX)
127 LOG.warning('Indexing places')
128 indexer = Indexer(args.config.get_libpq_dsn(), tokenizer,
129 args.threads or psutil.cpu_count() or 1)
130 indexer.index_full(analyse=not args.index_noanalyse)
132 LOG.warning('Post-process tables')
133 with connect(args.config.get_libpq_dsn()) as conn:
134 database_import.create_search_indices(conn, args.config,
135 drop=args.no_updates)
136 LOG.warning('Create search index for default country names.')
137 country_info.create_country_names(conn, tokenizer,
138 args.config.get_str_list('LANGUAGES'))
140 freeze.drop_update_tables(conn)
141 tokenizer.finalize_import(args.config)
143 LOG.warning('Recompute word counts')
144 tokenizer.update_statistics()
146 webdir = args.project_dir / 'website'
147 LOG.warning('Setup website at %s', webdir)
148 with connect(args.config.get_libpq_dsn()) as conn:
149 refresh.setup_website(webdir, args.config, conn)
151 self._finalize_database(args.config.get_libpq_dsn(), args.offline)
156 def _setup_tables(self, config: Configuration, reverse_only: bool) -> None:
157 """ Set up the basic database layout: tables, indexes and functions.
159 from ..tools import database_import, refresh
161 with connect(config.get_libpq_dsn()) as conn:
162 LOG.warning('Create functions (1st pass)')
163 refresh.create_functions(conn, config, False, False)
164 LOG.warning('Create tables')
165 database_import.create_tables(conn, config, reverse_only=reverse_only)
166 refresh.load_address_levels_from_config(conn, config)
167 LOG.warning('Create functions (2nd pass)')
168 refresh.create_functions(conn, config, False, False)
169 LOG.warning('Create table triggers')
170 database_import.create_table_triggers(conn, config)
171 LOG.warning('Create partition tables')
172 database_import.create_partition_tables(conn, config)
173 LOG.warning('Create functions (3rd pass)')
174 refresh.create_functions(conn, config, False, False)
177 def _get_tokenizer(self, continue_at: Optional[str],
178 config: Configuration) -> AbstractTokenizer:
179 """ Set up a new tokenizer or load an already initialised one.
181 from ..tokenizer import factory as tokenizer_factory
183 if continue_at is None or continue_at == 'load-data':
184 # (re)initialise the tokenizer data
185 return tokenizer_factory.create_tokenizer(config)
187 # just load the tokenizer
188 return tokenizer_factory.get_tokenizer_for_db(config)
191 def _create_pending_index(self, conn: Connection, tablespace: str) -> None:
192 """ Add a supporting index for finding places still to be indexed.
194 This index is normally created at the end of the import process
195 for later updates. When indexing was partially done, then this
196 index can greatly improve speed going through already indexed data.
198 if conn.index_exists('idx_placex_pendingsector'):
201 with conn.cursor() as cur:
202 LOG.warning('Creating support index')
204 tablespace = 'TABLESPACE ' + tablespace
205 cur.execute(f"""CREATE INDEX idx_placex_pendingsector
206 ON placex USING BTREE (rank_address,geometry_sector)
207 {tablespace} WHERE indexed_status > 0
212 def _finalize_database(self, dsn: str, offline: bool) -> None:
213 """ Determine the database date and set the status accordingly.
215 with connect(dsn) as conn:
218 dbdate = status.compute_database_date(conn)
219 status.set_status(conn, dbdate)
220 LOG.info('Database is at %s.', dbdate)
221 except Exception as exc: # pylint: disable=broad-except
222 LOG.error('Cannot determine date of database: %s', exc)
224 properties.set_property(conn, 'database_version', version_str())