2 #-----------------------------------------------------------------------------
3 # nominatim - [description]
4 #-----------------------------------------------------------------------------
6 # Indexing tool for the Nominatim database.
8 # Based on C version by Brian Quinion
10 # This program is free software; you can redistribute it and/or
11 # modify it under the terms of the GNU General Public License
12 # as published by the Free Software Foundation; either version 2
13 # of the License, or (at your option) any later version.
15 # This program is distributed in the hope that it will be useful,
16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 # GNU General Public License for more details.
20 # You should have received a copy of the GNU General Public License
21 # along with this program; if not, write to the Free Software
22 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
23 #-----------------------------------------------------------------------------
25 from argparse import ArgumentParser, RawDescriptionHelpFormatter, ArgumentTypeError
30 from datetime import datetime
32 from psycopg2.extras import wait_select
35 log = logging.getLogger()
37 def make_connection(options, asynchronous=False):
38 return psycopg2.connect(dbname=options.dbname, user=options.user,
39 password=options.password, host=options.host,
40 port=options.port, async_=asynchronous)
43 class RankRunner(object):
44 """ Returns SQL commands for indexing one rank within the placex table.
47 def __init__(self, rank):
51 return "rank {}".format(self.rank)
53 def sql_index_sectors(self):
54 return """SELECT geometry_sector, count(*) FROM placex
55 WHERE rank_search = {} and indexed_status > 0
56 GROUP BY geometry_sector
57 ORDER BY geometry_sector""".format(self.rank)
59 def sql_nosector_places(self):
60 return """SELECT place_id FROM placex
61 WHERE indexed_status > 0 and rank_search = {}
62 ORDER BY geometry_sector""".format(self.rank)
64 def sql_sector_places(self):
65 return """SELECT place_id FROM placex
66 WHERE indexed_status > 0 and rank_search = {}
67 and geometry_sector = %s""".format(self.rank)
69 def sql_index_place(self):
70 return "UPDATE placex SET indexed_status = 0 WHERE place_id = %s"
73 class InterpolationRunner(object):
74 """ Returns SQL commands for indexing the address interpolation table
75 location_property_osmline.
79 return "interpolation lines (location_property_osmline)"
81 def sql_index_sectors(self):
82 return """SELECT geometry_sector, count(*) FROM location_property_osmline
83 WHERE indexed_status > 0
84 GROUP BY geometry_sector
85 ORDER BY geometry_sector"""
87 def sql_nosector_places(self):
88 return """SELECT place_id FROM location_property_osmline
89 WHERE indexed_status > 0
90 ORDER BY geometry_sector"""
92 def sql_sector_places(self):
93 return """SELECT place_id FROM location_property_osmline
94 WHERE indexed_status > 0 and geometry_sector = %s
95 ORDER BY geometry_sector"""
97 def sql_index_place(self):
98 return """UPDATE location_property_osmline
99 SET indexed_status = 0 WHERE place_id = %s"""
102 class DBConnection(object):
103 """ A signle non-blocking database connection.
106 def __init__(self, options):
107 self.conn = make_connection(options, asynchronous=True)
110 self.cursor = self.conn.cursor()
112 self.current_query = None
113 self.current_params = None
116 """ Block until any pending operation is done.
118 wait_select(self.conn)
119 self.current_query = None
121 def perform(self, sql, args=None):
122 """ Send SQL query to the server. Returns immediately without
125 self.current_query = sql
126 self.current_params = args
127 self.cursor.execute(sql, args)
130 """ File descriptor to wait for. (Makes this class select()able.)
132 return self.conn.fileno()
135 """ Check if the connection is available for a new query.
137 Also checks if the previous query has run into a deadlock.
138 If so, then the previous query is repeated.
140 if self.current_query is None:
144 if self.conn.poll() == psycopg2.extensions.POLL_OK:
145 self.current_query = None
147 except psycopg2.extensions.TransactionRollbackError as e:
148 if e.pgcode == '40P01':
149 log.info("Deadlock detected, retry.")
150 self.cursor.execute(self.current_query, self.current_params)
157 class Indexer(object):
158 """ Main indexing routine.
161 def __init__(self, options):
162 self.minrank = max(0, options.minrank)
163 self.maxrank = min(30, options.maxrank)
164 self.conn = make_connection(options)
165 self.threads = [DBConnection(options) for i in range(options.threads)]
168 """ Run indexing over the entire database.
170 log.info("Starting indexing rank ({} to {}) using {} threads".format(
171 self.minrank, self.maxrank, len(self.threads)))
173 for rank in range(self.minrank, self.maxrank):
174 self.index(RankRunner(rank))
176 if self.maxrank == 30:
177 self.index(InterpolationRunner())
178 self.index(RankRunner(30))
180 def index(self, obj):
181 """ Index a single rank or table. `obj` describes the SQL to use
184 log.info("Starting {}".format(obj.name()))
186 cur = self.conn.cursor(name='main')
187 cur.execute(obj.sql_index_sectors())
192 log.debug("Total number of rows; {}".format(total_tuples))
194 cur.scroll(0, mode='absolute')
196 next_thread = self.find_free_thread()
198 rank_start_time = datetime.now()
200 sector_sql = obj.sql_sector_places()
201 index_sql = obj.sql_index_place()
202 min_grouped_tuples = total_tuples - len(self.threads) * 1000
206 # Should we do the remaining ones together?
207 do_all = done_tuples > min_grouped_tuples
209 pcur = self.conn.cursor(name='places')
212 pcur.execute(obj.sql_nosector_places())
214 pcur.execute(sector_sql, (sector, ))
218 log.debug("Processing place {}".format(place_id))
219 thread = next(next_thread)
221 thread.perform(index_sql, (place_id,))
231 for t in self.threads:
234 rank_end_time = datetime.now()
235 diff_seconds = (rank_end_time-rank_start_time).total_seconds()
237 log.info("Done {}/{} in {} @ {} per second - FINISHED {}\n".format(
238 done_tuples, total_tuples, int(diff_seconds),
239 done_tuples/diff_seconds, obj.name()))
241 def find_free_thread(self):
242 """ Generator that returns the next connection that is free for
252 ready, _, _ = select.select(self.threads, [], [])
254 assert(False, "Unreachable code")
257 def nominatim_arg_parser():
258 """ Setup the command-line parser for the tool.
261 return re.sub("\s\s+" , " ", s)
263 p = ArgumentParser(description="Indexing tool for Nominatim.",
264 formatter_class=RawDescriptionHelpFormatter)
266 p.add_argument('-d', '--database',
267 dest='dbname', action='store', default='nominatim',
268 help='Name of the PostgreSQL database to connect to.')
269 p.add_argument('-U', '--username',
270 dest='user', action='store',
271 help='PostgreSQL user name.')
272 p.add_argument('-W', '--password',
273 dest='password_prompt', action='store_true',
274 help='Force password prompt.')
275 p.add_argument('-H', '--host',
276 dest='host', action='store',
277 help='PostgreSQL server hostname or socket location.')
278 p.add_argument('-P', '--port',
279 dest='port', action='store',
280 help='PostgreSQL server port')
281 p.add_argument('-r', '--minrank',
282 dest='minrank', type=int, metavar='RANK', default=0,
283 help='Minimum/starting rank.')
284 p.add_argument('-R', '--maxrank',
285 dest='maxrank', type=int, metavar='RANK', default=30,
286 help='Maximum/finishing rank.')
287 p.add_argument('-t', '--threads',
288 dest='threads', type=int, metavar='NUM', default=1,
289 help='Number of threads to create for indexing.')
290 p.add_argument('-v', '--verbose',
291 dest='loglevel', action='count', default=0,
292 help='Increase verbosity')
296 if __name__ == '__main__':
297 logging.basicConfig(stream=sys.stderr, format='%(levelname)s: %(message)s')
299 options = nominatim_arg_parser().parse_args(sys.argv[1:])
301 log.setLevel(max(3 - options.loglevel, 0) * 10)
303 options.password = None
304 if options.password_prompt:
305 password = getpass.getpass("Database password: ")
306 options.password = password
308 Indexer(options).run()