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 ### Introducing `nominatim` command line tool
13 The various php utilities have been replaced with a single `nominatim`
14 command line tool. Make sure to adapt any scripts. There is no direct 1:1
15 matching between the old utilities and the commands of nominatim CLI. The
16 following list gives you a list of nominatim sub-commands that contain
17 functionality of each script:
19 * ./utils/setup.php: `import`, `freeze`, `refresh`
20 * ./utils/update.php: `replication`, `add-data`, `index`, `refresh`
21 * ./utils/specialphrases.php: `special-phrases`
22 * ./utils/check_import_finished.php: `check-database`
23 * ./utils/warm.php: `warm`
24 * ./utils/export.php: `export`
26 Try `nominatim <command> --help` for more information about each subcommand.
28 `./utils/query.php` no longer exists in its old form. `nominatim search`
29 provides a replacement.
33 ### Change of layout of search_name_* tables
35 The table need a different index for nearest place lookup. Recreate the
36 indexes using the following shell script:
39 for table in `psql -d nominatim -c "SELECT tablename FROM pg_tables WHERE tablename LIKE 'search_name_%'" -tA | grep -v search_name_blank`;
41 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))";
45 ### Removal of html output
47 The debugging UI is no longer directly provided with Nominatim. Instead we
48 now provide a simple Javascript application. Please refer to
49 [Setting up the Nominatim UI](../Setup-Nominatim-UI) for details on how to
52 The icons served together with the API responses have been moved to the
53 nominatim-ui project as well. If you want to keep the `icon` field in the
54 response, you need to set `CONST_MapIcon_URL` to the URL of the `/mapicon`
55 directory of nominatim-ui.
57 ### Change order during indexing
59 When reindexing places during updates, there is now a different order used
60 which needs a different database index. Create it with the following SQL command:
63 CREATE INDEX idx_placex_pendingsector_rank_address
65 USING BTREE (rank_address, geometry_sector)
66 WHERE indexed_status > 0;
69 You can then drop the old index with:
72 DROP INDEX idx_placex_pendingsector;
77 This index has been unused ever since the query using it was changed two years ago. Saves about 12GB on a planet installation.
80 DROP INDEX idx_placex_geometry_reverse_lookupPoint;
83 ### Switching to dotenv
85 As part of the work changing the configuration format, the configuration for
86 the website is now using a separate configuration file. To create the
87 configuration file, run the following command after updating:
90 ./utils/setup.php --setup-website
95 ### New Wikipedia/Wikidata importance tables
97 The `wikipedia_*` tables have a new format that also includes references to
98 Wikidata. You need to update the computation functions and the tables as
101 * download the new Wikipedia tables as described in the import section
102 * reimport the tables: `./utils/setup.php --import-wikipedia-articles`
103 * update the functions: `./utils/setup.php --create-functions --enable-diff-updates`
104 * create a new lookup index:
106 CREATE INDEX idx_placex_wikidata
108 USING BTREE ((extratags -> 'wikidata'))
109 WHERE extratags ? 'wikidata'
112 AND rank_search < 26;
114 * compute importance: `./utils/update.php --recompute-importance`
116 The last step takes about 10 hours on the full planet.
118 Remove one function (it will be recreated in the next step):
121 DROP FUNCTION create_country(hstore,character varying);
124 Finally, update all SQL functions:
127 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
132 ### Reorganisation of location_area_country table
134 The table `location_area_country` has been optimized. You need to switch to the
135 new format when you run updates. While updates are disabled, run the following
139 CREATE TABLE location_area_country_new AS
140 SELECT place_id, country_code, geometry FROM location_area_country;
141 DROP TABLE location_area_country;
142 ALTER TABLE location_area_country_new RENAME TO location_area_country;
143 CREATE INDEX idx_location_area_country_geometry ON location_area_country USING GIST (geometry);
144 CREATE INDEX idx_location_area_country_place_id ON location_area_country USING BTREE (place_id);
147 Finally, update all SQL functions:
150 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
155 ### New database connection string (DSN) format
157 Previously database connection setting (`CONST_Database_DSN` in `settings/*.php`) had the format
159 * (simple) `pgsql://@/nominatim`
160 * (complex) `pgsql://johndoe:secret@machine1.domain.com:1234/db1`
164 * (simple) `pgsql:dbname=nominatim`
165 * (complex) `pgsql:dbname=db1;host=machine1.domain.com;port=1234;user=johndoe;password=secret`
167 ### Natural Earth country boundaries no longer needed as fallback
170 DROP TABLE country_naturalearthdata;
173 Finally, update all SQL functions:
176 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
179 ### Configurable Address Levels
181 The new configurable address levels require a new table. Create it with the
185 ./utils/update.php --update-address-levels
190 ### New reverse algorithm
192 The reverse algorithm has changed and requires new indexes. Run the following
193 SQL statements to create the indexes:
196 CREATE INDEX idx_placex_geometry_reverse_lookupPoint
198 USING gist (geometry)
199 WHERE (name IS NOT null or housenumber IS NOT null or rank_address BETWEEN 26 AND 27)
200 AND class NOT IN ('railway','tunnel','bridge','man_made')
201 AND rank_address >= 26
202 AND indexed_status = 0
203 AND linked_place_id IS null;
204 CREATE INDEX idx_placex_geometry_reverse_lookupPolygon
205 ON placex USING gist (geometry)
206 WHERE St_GeometryType(geometry) in ('ST_Polygon', 'ST_MultiPolygon')
207 AND rank_address between 4 and 25
208 AND type != 'postcode'
210 AND indexed_status = 0
211 AND linked_place_id is null;
212 CREATE INDEX idx_placex_geometry_reverse_placeNode
213 ON placex USING gist (geometry)
215 AND rank_search between 5 and 25
217 AND type != 'postcode'
219 AND indexed_status = 0
220 AND linked_place_id is null;
223 You also need to grant the website user access to the `country_osm_grid` table:
226 GRANT SELECT ON table country_osm_grid to "www-user";
229 Replace the `www-user` with the user name of your website server if necessary.
231 You can now drop the unused indexes:
234 DROP INDEX idx_placex_reverse_geometry;
237 Finally, update all SQL functions:
240 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
247 A new separate table for artificially computed postcode centroids was introduced.
248 Migration to the new format is possible but **not recommended**.
250 Create postcode table and indexes, running the following SQL statements:
253 CREATE TABLE location_postcode
254 (place_id BIGINT, parent_place_id BIGINT, rank_search SMALLINT,
255 rank_address SMALLINT, indexed_status SMALLINT, indexed_date TIMESTAMP,
256 country_code varchar(2), postcode TEXT,
257 geometry GEOMETRY(Geometry, 4326));
258 CREATE INDEX idx_postcode_geometry ON location_postcode USING GIST (geometry);
259 CREATE UNIQUE INDEX idx_postcode_id ON location_postcode USING BTREE (place_id);
260 CREATE INDEX idx_postcode_postcode ON location_postcode USING BTREE (postcode);
261 GRANT SELECT ON location_postcode TO "www-data";
262 DROP TYPE IF EXISTS nearfeaturecentr CASCADE;
263 CREATE TYPE nearfeaturecentr AS (
266 rank_address smallint,
267 rank_search smallint,
275 Add postcode column to `location_area` tables with SQL statement:
278 ALTER TABLE location_area ADD COLUMN postcode TEXT;
281 Then reimport the functions:
284 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
287 Create appropriate triggers with SQL:
290 CREATE TRIGGER location_postcode_before_update BEFORE UPDATE ON location_postcode
291 FOR EACH ROW EXECUTE PROCEDURE postcode_update();
294 Finally populate the postcode table (will take a while):
297 ./utils/setup.php --calculate-postcodes --index --index-noanalyse
300 This will create a working database. You may also delete the old artificial
301 postcodes now. Note that this may be expensive and is not absolutely necessary.
302 The following SQL statement will remove them:
305 DELETE FROM place_addressline a USING placex p
306 WHERE a.address_place_id = p.place_id and p.osm_type = 'P';
307 ALTER TABLE placex DISABLE TRIGGER USER;
308 DELETE FROM placex WHERE osm_type = 'P';
309 ALTER TABLE placex ENABLE TRIGGER USER;