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 ### ICU tokenizer is the new default
22 Nominatim now installs the [ICU tokenizer](../customize/Tokenizers.md#icu-tokenizer)
23 by default. This only has an effect on newly installed databases. When
24 updating older databases, it keeps its installed tokenizer. If you still
25 run with the legacy tokenizer, make sure to compile Nominatim with the
26 PostgreSQL module, see [Installation](Installation.md#building-nominatim).
28 ### geocodejson output changed
30 The `type` field of the geocodejson output has changed. It now contains
31 the address class of the object instead of the value of the OSM tag. If
32 your client has used the `type` field, switch them to read `osm_value`
37 ### NOMINATIM_PHRASE_CONFIG removed
39 Custom blacklist configurations for special phrases now need to be handed
40 with the `--config` parameter to `nominatim special-phrases`. Alternatively
41 you can put your custom configuration in the project directory in a file
42 named `phrase-settings.json`.
44 Version 3.8 also removes the automatic converter for the php format of
45 the configuration in older versions. If you are updating from Nominatim < 3.7
46 and still work with a custom `phrase-settings.php`, you need to manually
47 convert it into a json format.
51 The old PHP utils have now been removed completely. You need to switch to
52 the appropriate functions of the nominatim command line tool. See
53 [Introducing `nominatim` command line tool](#introducing-nominatim-command-line-tool)
58 ### New format and name of configuration file
60 The configuration for an import is now saved in a `.env` file in the project
61 directory. This file follows the dotenv format. For more information, see
62 the [installation chapter](Import.md#configuration-setup-in-env).
64 To migrate to the new system, create a new project directory, add the `.env`
65 file and port your custom configuration from `settings/local.php`. Most
66 settings are named similar and only have received a `NOMINATIM_` prefix.
67 Use the default settings in `settings/env.defaults` as a reference.
69 ### New location for data files
71 External data files for Wikipedia importance, postcodes etc. are no longer
72 expected to reside in the source tree by default. Instead they will be searched
73 in the project directory. If you have an automated setup script you must
74 either adapt the download location or explicitly set the location of the
75 files to the old place in your `.env`.
77 ### Introducing `nominatim` command line tool
79 The various php utilities have been replaced with a single `nominatim`
80 command line tool. Make sure to adapt any scripts. There is no direct 1:1
81 matching between the old utilities and the commands of nominatim CLI. The
82 following list gives you a list of nominatim sub-commands that contain
83 functionality of each script:
85 * ./utils/setup.php: `import`, `freeze`, `refresh`
86 * ./utils/update.php: `replication`, `add-data`, `index`, `refresh`
87 * ./utils/specialphrases.php: `special-phrases`
88 * ./utils/check_import_finished.php: `admin`
89 * ./utils/warm.php: `admin`
90 * ./utils/export.php: `export`
92 Try `nominatim <command> --help` for more information about each subcommand.
94 `./utils/query.php` no longer exists in its old form. `nominatim search`
95 provides a replacement but returns different output.
97 ### Switch to normalized house numbers
99 The housenumber column in the placex table uses now normalized version.
100 The automatic migration step will convert the column but this may take a
101 very long time. It is advisable to take the machine offline while doing that.
105 ### Change of layout of search_name_* tables
107 The table need a different index for nearest place lookup. Recreate the
108 indexes using the following shell script:
111 for table in `psql -d nominatim -c "SELECT tablename FROM pg_tables WHERE tablename LIKE 'search_name_%'" -tA | grep -v search_name_blank`;
113 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))";
117 ### Removal of html output
119 The debugging UI is no longer directly provided with Nominatim. Instead we
120 now provide a simple Javascript application. Please refer to
121 [Setting up the Nominatim UI](Setup-Nominatim-UI.md) for details on how to
124 The icons served together with the API responses have been moved to the
125 nominatim-ui project as well. If you want to keep the `icon` field in the
126 response, you need to set `CONST_MapIcon_URL` to the URL of the `/mapicon`
127 directory of nominatim-ui.
129 ### Change order during indexing
131 When reindexing places during updates, there is now a different order used
132 which needs a different database index. Create it with the following SQL command:
135 CREATE INDEX idx_placex_pendingsector_rank_address
137 USING BTREE (rank_address, geometry_sector)
138 WHERE indexed_status > 0;
141 You can then drop the old index with:
144 DROP INDEX idx_placex_pendingsector;
149 This index has been unused ever since the query using it was changed two years ago. Saves about 12GB on a planet installation.
152 DROP INDEX idx_placex_geometry_reverse_lookupPoint;
155 ### Switching to dotenv
157 As part of the work changing the configuration format, the configuration for
158 the website is now using a separate configuration file. To create the
159 configuration file, run the following command after updating:
162 ./utils/setup.php --setup-website
167 To update the SQL code to the leatest version run:
170 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
175 ### New Wikipedia/Wikidata importance tables
177 The `wikipedia_*` tables have a new format that also includes references to
178 Wikidata. You need to update the computation functions and the tables as
181 * download the new Wikipedia tables as described in the import section
182 * reimport the tables: `./utils/setup.php --import-wikipedia-articles`
183 * update the functions: `./utils/setup.php --create-functions --enable-diff-updates`
184 * create a new lookup index:
186 CREATE INDEX idx_placex_wikidata
188 USING BTREE ((extratags -> 'wikidata'))
189 WHERE extratags ? 'wikidata'
192 AND rank_search < 26;
194 * compute importance: `./utils/update.php --recompute-importance`
196 The last step takes about 10 hours on the full planet.
198 Remove one function (it will be recreated in the next step):
201 DROP FUNCTION create_country(hstore,character varying);
204 Finally, update all SQL functions:
207 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
212 ### Reorganisation of location_area_country table
214 The table `location_area_country` has been optimized. You need to switch to the
215 new format when you run updates. While updates are disabled, run the following
219 CREATE TABLE location_area_country_new AS
220 SELECT place_id, country_code, geometry FROM location_area_country;
221 DROP TABLE location_area_country;
222 ALTER TABLE location_area_country_new RENAME TO location_area_country;
223 CREATE INDEX idx_location_area_country_geometry ON location_area_country USING GIST (geometry);
224 CREATE INDEX idx_location_area_country_place_id ON location_area_country USING BTREE (place_id);
227 Finally, update all SQL functions:
230 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
235 ### New database connection string (DSN) format
237 Previously database connection setting (`CONST_Database_DSN` in `settings/*.php`) had the format
239 * (simple) `pgsql://@/nominatim`
240 * (complex) `pgsql://johndoe:secret@machine1.domain.com:1234/db1`
244 * (simple) `pgsql:dbname=nominatim`
245 * (complex) `pgsql:dbname=db1;host=machine1.domain.com;port=1234;user=johndoe;password=secret`
247 ### Natural Earth country boundaries no longer needed as fallback
250 DROP TABLE country_naturalearthdata;
253 Finally, update all SQL functions:
256 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
259 ### Configurable Address Levels
261 The new configurable address levels require a new table. Create it with the
265 ./utils/update.php --update-address-levels
270 ### New reverse algorithm
272 The reverse algorithm has changed and requires new indexes. Run the following
273 SQL statements to create the indexes:
276 CREATE INDEX idx_placex_geometry_reverse_lookupPoint
278 USING gist (geometry)
279 WHERE (name IS NOT null or housenumber IS NOT null or rank_address BETWEEN 26 AND 27)
280 AND class NOT IN ('railway','tunnel','bridge','man_made')
281 AND rank_address >= 26
282 AND indexed_status = 0
283 AND linked_place_id IS null;
284 CREATE INDEX idx_placex_geometry_reverse_lookupPolygon
285 ON placex USING gist (geometry)
286 WHERE St_GeometryType(geometry) in ('ST_Polygon', 'ST_MultiPolygon')
287 AND rank_address between 4 and 25
288 AND type != 'postcode'
290 AND indexed_status = 0
291 AND linked_place_id is null;
292 CREATE INDEX idx_placex_geometry_reverse_placeNode
293 ON placex USING gist (geometry)
295 AND rank_search between 5 and 25
297 AND type != 'postcode'
299 AND indexed_status = 0
300 AND linked_place_id is null;
303 You also need to grant the website user access to the `country_osm_grid` table:
306 GRANT SELECT ON table country_osm_grid to "www-user";
309 Replace the `www-user` with the user name of your website server if necessary.
311 You can now drop the unused indexes:
314 DROP INDEX idx_placex_reverse_geometry;
317 Finally, update all SQL functions:
320 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
327 A new separate table for artificially computed postcode centroids was introduced.
328 Migration to the new format is possible but **not recommended**.
330 Create postcode table and indexes, running the following SQL statements:
333 CREATE TABLE location_postcode
334 (place_id BIGINT, parent_place_id BIGINT, rank_search SMALLINT,
335 rank_address SMALLINT, indexed_status SMALLINT, indexed_date TIMESTAMP,
336 country_code varchar(2), postcode TEXT,
337 geometry GEOMETRY(Geometry, 4326));
338 CREATE INDEX idx_postcode_geometry ON location_postcode USING GIST (geometry);
339 CREATE UNIQUE INDEX idx_postcode_id ON location_postcode USING BTREE (place_id);
340 CREATE INDEX idx_postcode_postcode ON location_postcode USING BTREE (postcode);
341 GRANT SELECT ON location_postcode TO "www-data";
342 DROP TYPE IF EXISTS nearfeaturecentr CASCADE;
343 CREATE TYPE nearfeaturecentr AS (
346 rank_address smallint,
347 rank_search smallint,
355 Add postcode column to `location_area` tables with SQL statement:
358 ALTER TABLE location_area ADD COLUMN postcode TEXT;
361 Then reimport the functions:
364 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
367 Create appropriate triggers with SQL:
370 CREATE TRIGGER location_postcode_before_update BEFORE UPDATE ON location_postcode
371 FOR EACH ROW EXECUTE PROCEDURE postcode_update();
374 Finally populate the postcode table (will take a while):
377 ./utils/setup.php --calculate-postcodes --index --index-noanalyse
380 This will create a working database. You may also delete the old artificial
381 postcodes now. Note that this may be expensive and is not absolutely necessary.
382 The following SQL statement will remove them:
385 DELETE FROM place_addressline a USING placex p
386 WHERE a.address_place_id = p.place_id and p.osm_type = 'P';
387 ALTER TABLE placex DISABLE TRIGGER USER;
388 DELETE FROM placex WHERE osm_type = 'P';
389 ALTER TABLE placex ENABLE TRIGGER USER;