3 Since version 3.7.0 Nominatim offers automatic migrations. Please follow
6 * stop any updates that are potentially running
7 * update Nominatim to the newer version
8 * go to your project directory and run `nominatim admin --migrate`
9 * (optionally) restart updates
11 Below you find additional migrations and hints about other structural and
12 breaking changes. **Please read them before running the migration.**
15 If you are migrating from a version <3.6, then you still have to follow
16 the manual migration steps up to 3.6.
20 ### New format and name of configuration file
22 The configuration for an import is now saved in a `.env` file in the project
23 directory. This file follows the dotenv format. For more information, see
24 the [installation chapter](Import.md#configuration-setup-in-env).
26 To migrate to the new system, create a new project directory, add the `.env`
27 file and port your custom configuration from `settings/local.php`. Most
28 settings are named similar and only have received a `NOMINATIM_` prefix.
29 Use the default settings in `settings/env.defaults` as a reference.
31 ### New location for data files
33 External data files for Wikipedia importance, postcodes etc. are no longer
34 expected to reside in the source tree by default. Instead they will be searched
35 in the project directory. If you have an automated setup script you must
36 either adapt the download location or explicitly set the location of the
37 files to the old place in your `.env`.
39 ### Introducing `nominatim` command line tool
41 The various php utilities have been replaced with a single `nominatim`
42 command line tool. Make sure to adapt any scripts. There is no direct 1:1
43 matching between the old utilities and the commands of nominatim CLI. The
44 following list gives you a list of nominatim sub-commands that contain
45 functionality of each script:
47 * ./utils/setup.php: `import`, `freeze`, `refresh`
48 * ./utils/update.php: `replication`, `add-data`, `index`, `refresh`
49 * ./utils/specialphrases.php: `special-phrases`
50 * ./utils/check_import_finished.php: `admin`
51 * ./utils/warm.php: `admin`
52 * ./utils/export.php: `export`
54 Try `nominatim <command> --help` for more information about each subcommand.
56 `./utils/query.php` no longer exists in its old form. `nominatim search`
57 provides a replacement but returns different output.
59 ### Switch to normalized house numbers
61 The housenumber column in the placex table uses now normalized version.
62 The automatic migration step will convert the column but this may take a
63 very long time. It is advisable to take the machine offline while doing that.
67 ### Change of layout of search_name_* tables
69 The table need a different index for nearest place lookup. Recreate the
70 indexes using the following shell script:
73 for table in `psql -d nominatim -c "SELECT tablename FROM pg_tables WHERE tablename LIKE 'search_name_%'" -tA | grep -v search_name_blank`;
75 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))";
79 ### Removal of html output
81 The debugging UI is no longer directly provided with Nominatim. Instead we
82 now provide a simple Javascript application. Please refer to
83 [Setting up the Nominatim UI](Setup-Nominatim-UI.md) for details on how to
86 The icons served together with the API responses have been moved to the
87 nominatim-ui project as well. If you want to keep the `icon` field in the
88 response, you need to set `CONST_MapIcon_URL` to the URL of the `/mapicon`
89 directory of nominatim-ui.
91 ### Change order during indexing
93 When reindexing places during updates, there is now a different order used
94 which needs a different database index. Create it with the following SQL command:
97 CREATE INDEX idx_placex_pendingsector_rank_address
99 USING BTREE (rank_address, geometry_sector)
100 WHERE indexed_status > 0;
103 You can then drop the old index with:
106 DROP INDEX idx_placex_pendingsector;
111 This index has been unused ever since the query using it was changed two years ago. Saves about 12GB on a planet installation.
114 DROP INDEX idx_placex_geometry_reverse_lookupPoint;
117 ### Switching to dotenv
119 As part of the work changing the configuration format, the configuration for
120 the website is now using a separate configuration file. To create the
121 configuration file, run the following command after updating:
124 ./utils/setup.php --setup-website
129 To update the SQL code to the leatest version run:
132 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
137 ### New Wikipedia/Wikidata importance tables
139 The `wikipedia_*` tables have a new format that also includes references to
140 Wikidata. You need to update the computation functions and the tables as
143 * download the new Wikipedia tables as described in the import section
144 * reimport the tables: `./utils/setup.php --import-wikipedia-articles`
145 * update the functions: `./utils/setup.php --create-functions --enable-diff-updates`
146 * create a new lookup index:
148 CREATE INDEX idx_placex_wikidata
150 USING BTREE ((extratags -> 'wikidata'))
151 WHERE extratags ? 'wikidata'
154 AND rank_search < 26;
156 * compute importance: `./utils/update.php --recompute-importance`
158 The last step takes about 10 hours on the full planet.
160 Remove one function (it will be recreated in the next step):
163 DROP FUNCTION create_country(hstore,character varying);
166 Finally, update all SQL functions:
169 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
174 ### Reorganisation of location_area_country table
176 The table `location_area_country` has been optimized. You need to switch to the
177 new format when you run updates. While updates are disabled, run the following
181 CREATE TABLE location_area_country_new AS
182 SELECT place_id, country_code, geometry FROM location_area_country;
183 DROP TABLE location_area_country;
184 ALTER TABLE location_area_country_new RENAME TO location_area_country;
185 CREATE INDEX idx_location_area_country_geometry ON location_area_country USING GIST (geometry);
186 CREATE INDEX idx_location_area_country_place_id ON location_area_country USING BTREE (place_id);
189 Finally, update all SQL functions:
192 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
197 ### New database connection string (DSN) format
199 Previously database connection setting (`CONST_Database_DSN` in `settings/*.php`) had the format
201 * (simple) `pgsql://@/nominatim`
202 * (complex) `pgsql://johndoe:secret@machine1.domain.com:1234/db1`
206 * (simple) `pgsql:dbname=nominatim`
207 * (complex) `pgsql:dbname=db1;host=machine1.domain.com;port=1234;user=johndoe;password=secret`
209 ### Natural Earth country boundaries no longer needed as fallback
212 DROP TABLE country_naturalearthdata;
215 Finally, update all SQL functions:
218 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
221 ### Configurable Address Levels
223 The new configurable address levels require a new table. Create it with the
227 ./utils/update.php --update-address-levels
232 ### New reverse algorithm
234 The reverse algorithm has changed and requires new indexes. Run the following
235 SQL statements to create the indexes:
238 CREATE INDEX idx_placex_geometry_reverse_lookupPoint
240 USING gist (geometry)
241 WHERE (name IS NOT null or housenumber IS NOT null or rank_address BETWEEN 26 AND 27)
242 AND class NOT IN ('railway','tunnel','bridge','man_made')
243 AND rank_address >= 26
244 AND indexed_status = 0
245 AND linked_place_id IS null;
246 CREATE INDEX idx_placex_geometry_reverse_lookupPolygon
247 ON placex USING gist (geometry)
248 WHERE St_GeometryType(geometry) in ('ST_Polygon', 'ST_MultiPolygon')
249 AND rank_address between 4 and 25
250 AND type != 'postcode'
252 AND indexed_status = 0
253 AND linked_place_id is null;
254 CREATE INDEX idx_placex_geometry_reverse_placeNode
255 ON placex USING gist (geometry)
257 AND rank_search between 5 and 25
259 AND type != 'postcode'
261 AND indexed_status = 0
262 AND linked_place_id is null;
265 You also need to grant the website user access to the `country_osm_grid` table:
268 GRANT SELECT ON table country_osm_grid to "www-user";
271 Replace the `www-user` with the user name of your website server if necessary.
273 You can now drop the unused indexes:
276 DROP INDEX idx_placex_reverse_geometry;
279 Finally, update all SQL functions:
282 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
289 A new separate table for artificially computed postcode centroids was introduced.
290 Migration to the new format is possible but **not recommended**.
292 Create postcode table and indexes, running the following SQL statements:
295 CREATE TABLE location_postcode
296 (place_id BIGINT, parent_place_id BIGINT, rank_search SMALLINT,
297 rank_address SMALLINT, indexed_status SMALLINT, indexed_date TIMESTAMP,
298 country_code varchar(2), postcode TEXT,
299 geometry GEOMETRY(Geometry, 4326));
300 CREATE INDEX idx_postcode_geometry ON location_postcode USING GIST (geometry);
301 CREATE UNIQUE INDEX idx_postcode_id ON location_postcode USING BTREE (place_id);
302 CREATE INDEX idx_postcode_postcode ON location_postcode USING BTREE (postcode);
303 GRANT SELECT ON location_postcode TO "www-data";
304 DROP TYPE IF EXISTS nearfeaturecentr CASCADE;
305 CREATE TYPE nearfeaturecentr AS (
308 rank_address smallint,
309 rank_search smallint,
317 Add postcode column to `location_area` tables with SQL statement:
320 ALTER TABLE location_area ADD COLUMN postcode TEXT;
323 Then reimport the functions:
326 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
329 Create appropriate triggers with SQL:
332 CREATE TRIGGER location_postcode_before_update BEFORE UPDATE ON location_postcode
333 FOR EACH ROW EXECUTE PROCEDURE postcode_update();
336 Finally populate the postcode table (will take a while):
339 ./utils/setup.php --calculate-postcodes --index --index-noanalyse
342 This will create a working database. You may also delete the old artificial
343 postcodes now. Note that this may be expensive and is not absolutely necessary.
344 The following SQL statement will remove them:
347 DELETE FROM place_addressline a USING placex p
348 WHERE a.address_place_id = p.place_id and p.osm_type = 'P';
349 ALTER TABLE placex DISABLE TRIGGER USER;
350 DELETE FROM placex WHERE osm_type = 'P';
351 ALTER TABLE placex ENABLE TRIGGER USER;