1 # SPDX-License-Identifier: GPL-3.0-or-later
3 # This file is part of Nominatim. (https://nominatim.org)
5 # Copyright (C) 2024 by the Nominatim developer community.
6 # For a full list of authors see the git log.
8 Functions for database analysis and maintenance.
10 from typing import Optional, Tuple, Any, cast
14 from psycopg.types.json import Json
16 from ..typing import DictCursorResult
17 from ..config import Configuration
18 from ..db.connection import connect, Cursor, register_hstore
19 from ..db.sql_preprocessor import SQLPreprocessor
20 from ..errors import UsageError
21 from ..tokenizer import factory as tokenizer_factory
22 from ..data.place_info import PlaceInfo
24 LOG = logging.getLogger()
27 def _get_place_info(cursor: Cursor, osm_id: Optional[str],
28 place_id: Optional[int]) -> DictCursorResult:
29 sql = """SELECT place_id, extra.*
30 FROM placex, LATERAL placex_indexing_prepare(placex) as extra
33 values: Tuple[Any, ...]
35 osm_type = osm_id[0].upper()
36 if osm_type not in 'NWR' or not osm_id[1:].isdigit():
37 LOG.fatal('OSM ID must be of form <N|W|R><id>. Got: %s', osm_id)
38 raise UsageError("OSM ID parameter badly formatted")
40 sql += ' WHERE placex.osm_type = %s AND placex.osm_id = %s'
41 values = (osm_type, int(osm_id[1:]))
42 elif place_id is not None:
43 sql += ' WHERE placex.place_id = %s'
46 LOG.fatal("No OSM object given to index.")
47 raise UsageError("OSM object not found")
49 cursor.execute(sql + ' LIMIT 1', values)
51 if cursor.rowcount < 1:
52 LOG.fatal("OSM object %s not found in database.", osm_id)
53 raise UsageError("OSM object not found")
55 return cast(DictCursorResult, cursor.fetchone())
58 def analyse_indexing(config: Configuration, osm_id: Optional[str] = None,
59 place_id: Optional[int] = None) -> None:
60 """ Analyse indexing of a single Nominatim object.
62 with connect(config.get_libpq_dsn()) as conn:
64 with conn.cursor(row_factory=psycopg.rows.dict_row) as cur:
65 place = _get_place_info(cur, osm_id, place_id)
67 cur.execute("update placex set indexed_status = 2 where place_id = %s",
68 (place['place_id'], ))
70 cur.execute("""SET auto_explain.log_min_duration = '0';
71 SET auto_explain.log_analyze = 'true';
72 SET auto_explain.log_nested_statements = 'true';
74 SET client_min_messages = LOG;
75 SET log_min_messages = FATAL""")
77 tokenizer = tokenizer_factory.get_tokenizer_for_db(config)
79 # Enable printing of messages.
80 conn.add_notice_handler(lambda diag: print(diag.message_primary))
82 with tokenizer.name_analyzer() as analyzer:
83 cur.execute("""UPDATE placex
84 SET indexed_status = 0, address = %s, token_info = %s,
85 name = %s, linked_place_id = %s
86 WHERE place_id = %s""",
88 Json(analyzer.process_place(PlaceInfo(place))),
89 place['name'], place['linked_place_id'], place['place_id']))
91 # we do not want to keep the results
95 def clean_deleted_relations(config: Configuration, age: str) -> None:
96 """ Clean deleted relations older than a given age
98 with connect(config.get_libpq_dsn()) as conn:
99 with conn.cursor() as cur:
101 cur.execute("""SELECT place_force_delete(p.place_id)
102 FROM import_polygon_delete d, placex p
103 WHERE p.osm_type = d.osm_type AND p.osm_id = d.osm_id
104 AND age(p.indexed_date) > %s::interval""",
106 except psycopg.DataError as exc:
107 raise UsageError('Invalid PostgreSQL time interval format') from exc
111 def grant_ro_access(dsn: str, config: Configuration) -> None:
112 """ Grant read-only access to the web user for all Nominatim tables.
113 This can be used to grant access to a different user after import.
115 with connect(dsn) as conn:
116 sql = SQLPreprocessor(conn, config)
117 sql.run_sql_file(conn, 'grants.sql')