3 This page describes database migrations necessary to update existing databases
4 to newer versions of Nominatim.
6 SQL statements should be executed from the PostgreSQL commandline. Execute
7 `psql nominatim` to enter command line mode.
11 ### New location for data files
13 External data files for Wikipedia importance, postcodes etc. are no longer
14 expected to reside in the source tree by default. Instead they will be searched
15 in the project directory. If you have an automated setup script you must
16 either adapt the download location or explicitly set the location of the
17 files to the old place in your `.env`.
19 ### Introducing `nominatim` command line tool
21 The various php utilities have been replaced with a single `nominatim`
22 command line tool. Make sure to adapt any scripts. There is no direct 1:1
23 matching between the old utilities and the commands of nominatim CLI. The
24 following list gives you a list of nominatim sub-commands that contain
25 functionality of each script:
27 * ./utils/setup.php: `import`, `freeze`, `refresh`
28 * ./utils/update.php: `replication`, `add-data`, `index`, `refresh`
29 * ./utils/specialphrases.php: `special-phrases`
30 * ./utils/check_import_finished.php: `check-database`
31 * ./utils/warm.php: `warm`
32 * ./utils/export.php: `export`
34 Try `nominatim <command> --help` for more information about each subcommand.
36 `./utils/query.php` no longer exists in its old form. `nominatim search`
37 provides a replacement but returns different output.
41 ### Change of layout of search_name_* tables
43 The table need a different index for nearest place lookup. Recreate the
44 indexes using the following shell script:
47 for table in `psql -d nominatim -c "SELECT tablename FROM pg_tables WHERE tablename LIKE 'search_name_%'" -tA | grep -v search_name_blank`;
49 psql -d nominatim -c "DROP INDEX idx_${table}_centroid_place; CREATE INDEX idx_${table}_centroid_place ON ${table} USING gist (centroid) WHERE ((address_rank >= 2) AND (address_rank <= 25)); DROP INDEX idx_${table}_centroid_street; CREATE INDEX idx_${table}_centroid_street ON ${table} USING gist (centroid) WHERE ((address_rank >= 26) AND (address_rank <= 27))";
53 ### Removal of html output
55 The debugging UI is no longer directly provided with Nominatim. Instead we
56 now provide a simple Javascript application. Please refer to
57 [Setting up the Nominatim UI](../Setup-Nominatim-UI) for details on how to
60 The icons served together with the API responses have been moved to the
61 nominatim-ui project as well. If you want to keep the `icon` field in the
62 response, you need to set `CONST_MapIcon_URL` to the URL of the `/mapicon`
63 directory of nominatim-ui.
65 ### Change order during indexing
67 When reindexing places during updates, there is now a different order used
68 which needs a different database index. Create it with the following SQL command:
71 CREATE INDEX idx_placex_pendingsector_rank_address
73 USING BTREE (rank_address, geometry_sector)
74 WHERE indexed_status > 0;
77 You can then drop the old index with:
80 DROP INDEX idx_placex_pendingsector;
85 This index has been unused ever since the query using it was changed two years ago. Saves about 12GB on a planet installation.
88 DROP INDEX idx_placex_geometry_reverse_lookupPoint;
91 ### Switching to dotenv
93 As part of the work changing the configuration format, the configuration for
94 the website is now using a separate configuration file. To create the
95 configuration file, run the following command after updating:
98 ./utils/setup.php --setup-website
103 ### New Wikipedia/Wikidata importance tables
105 The `wikipedia_*` tables have a new format that also includes references to
106 Wikidata. You need to update the computation functions and the tables as
109 * download the new Wikipedia tables as described in the import section
110 * reimport the tables: `./utils/setup.php --import-wikipedia-articles`
111 * update the functions: `./utils/setup.php --create-functions --enable-diff-updates`
112 * create a new lookup index:
114 CREATE INDEX idx_placex_wikidata
116 USING BTREE ((extratags -> 'wikidata'))
117 WHERE extratags ? 'wikidata'
120 AND rank_search < 26;
122 * compute importance: `./utils/update.php --recompute-importance`
124 The last step takes about 10 hours on the full planet.
126 Remove one function (it will be recreated in the next step):
129 DROP FUNCTION create_country(hstore,character varying);
132 Finally, update all SQL functions:
135 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
140 ### Reorganisation of location_area_country table
142 The table `location_area_country` has been optimized. You need to switch to the
143 new format when you run updates. While updates are disabled, run the following
147 CREATE TABLE location_area_country_new AS
148 SELECT place_id, country_code, geometry FROM location_area_country;
149 DROP TABLE location_area_country;
150 ALTER TABLE location_area_country_new RENAME TO location_area_country;
151 CREATE INDEX idx_location_area_country_geometry ON location_area_country USING GIST (geometry);
152 CREATE INDEX idx_location_area_country_place_id ON location_area_country USING BTREE (place_id);
155 Finally, update all SQL functions:
158 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
163 ### New database connection string (DSN) format
165 Previously database connection setting (`CONST_Database_DSN` in `settings/*.php`) had the format
167 * (simple) `pgsql://@/nominatim`
168 * (complex) `pgsql://johndoe:secret@machine1.domain.com:1234/db1`
172 * (simple) `pgsql:dbname=nominatim`
173 * (complex) `pgsql:dbname=db1;host=machine1.domain.com;port=1234;user=johndoe;password=secret`
175 ### Natural Earth country boundaries no longer needed as fallback
178 DROP TABLE country_naturalearthdata;
181 Finally, update all SQL functions:
184 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
187 ### Configurable Address Levels
189 The new configurable address levels require a new table. Create it with the
193 ./utils/update.php --update-address-levels
198 ### New reverse algorithm
200 The reverse algorithm has changed and requires new indexes. Run the following
201 SQL statements to create the indexes:
204 CREATE INDEX idx_placex_geometry_reverse_lookupPoint
206 USING gist (geometry)
207 WHERE (name IS NOT null or housenumber IS NOT null or rank_address BETWEEN 26 AND 27)
208 AND class NOT IN ('railway','tunnel','bridge','man_made')
209 AND rank_address >= 26
210 AND indexed_status = 0
211 AND linked_place_id IS null;
212 CREATE INDEX idx_placex_geometry_reverse_lookupPolygon
213 ON placex USING gist (geometry)
214 WHERE St_GeometryType(geometry) in ('ST_Polygon', 'ST_MultiPolygon')
215 AND rank_address between 4 and 25
216 AND type != 'postcode'
218 AND indexed_status = 0
219 AND linked_place_id is null;
220 CREATE INDEX idx_placex_geometry_reverse_placeNode
221 ON placex USING gist (geometry)
223 AND rank_search between 5 and 25
225 AND type != 'postcode'
227 AND indexed_status = 0
228 AND linked_place_id is null;
231 You also need to grant the website user access to the `country_osm_grid` table:
234 GRANT SELECT ON table country_osm_grid to "www-user";
237 Replace the `www-user` with the user name of your website server if necessary.
239 You can now drop the unused indexes:
242 DROP INDEX idx_placex_reverse_geometry;
245 Finally, update all SQL functions:
248 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
255 A new separate table for artificially computed postcode centroids was introduced.
256 Migration to the new format is possible but **not recommended**.
258 Create postcode table and indexes, running the following SQL statements:
261 CREATE TABLE location_postcode
262 (place_id BIGINT, parent_place_id BIGINT, rank_search SMALLINT,
263 rank_address SMALLINT, indexed_status SMALLINT, indexed_date TIMESTAMP,
264 country_code varchar(2), postcode TEXT,
265 geometry GEOMETRY(Geometry, 4326));
266 CREATE INDEX idx_postcode_geometry ON location_postcode USING GIST (geometry);
267 CREATE UNIQUE INDEX idx_postcode_id ON location_postcode USING BTREE (place_id);
268 CREATE INDEX idx_postcode_postcode ON location_postcode USING BTREE (postcode);
269 GRANT SELECT ON location_postcode TO "www-data";
270 DROP TYPE IF EXISTS nearfeaturecentr CASCADE;
271 CREATE TYPE nearfeaturecentr AS (
274 rank_address smallint,
275 rank_search smallint,
283 Add postcode column to `location_area` tables with SQL statement:
286 ALTER TABLE location_area ADD COLUMN postcode TEXT;
289 Then reimport the functions:
292 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
295 Create appropriate triggers with SQL:
298 CREATE TRIGGER location_postcode_before_update BEFORE UPDATE ON location_postcode
299 FOR EACH ROW EXECUTE PROCEDURE postcode_update();
302 Finally populate the postcode table (will take a while):
305 ./utils/setup.php --calculate-postcodes --index --index-noanalyse
308 This will create a working database. You may also delete the old artificial
309 postcodes now. Note that this may be expensive and is not absolutely necessary.
310 The following SQL statement will remove them:
313 DELETE FROM place_addressline a USING placex p
314 WHERE a.address_place_id = p.place_id and p.osm_type = 'P';
315 ALTER TABLE placex DISABLE TRIGGER USER;
316 DELETE FROM placex WHERE osm_type = 'P';
317 ALTER TABLE placex ENABLE TRIGGER USER;