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 ### Status table contains now time zone information
13 The `import_status` table has been changed to include timezone information
14 with the time stamp. You need to alter an existing table before running
15 any replication functions with:
18 ALTER TABLE import_status ALTER COLUMN lastimportdate TYPE timestamp with time zone;
21 ### New location for data files
23 External data files for Wikipedia importance, postcodes etc. are no longer
24 expected to reside in the source tree by default. Instead they will be searched
25 in the project directory. If you have an automated setup script you must
26 either adapt the download location or explicitly set the location of the
27 files to the old place in your `.env`.
29 ### Introducing `nominatim` command line tool
31 The various php utilities have been replaced with a single `nominatim`
32 command line tool. Make sure to adapt any scripts. There is no direct 1:1
33 matching between the old utilities and the commands of nominatim CLI. The
34 following list gives you a list of nominatim sub-commands that contain
35 functionality of each script:
37 * ./utils/setup.php: `import`, `freeze`, `refresh`
38 * ./utils/update.php: `replication`, `add-data`, `index`, `refresh`
39 * ./utils/specialphrases.php: `special-phrases`
40 * ./utils/check_import_finished.php: `check-database`
41 * ./utils/warm.php: `warm`
42 * ./utils/export.php: `export`
44 Try `nominatim <command> --help` for more information about each subcommand.
46 `./utils/query.php` no longer exists in its old form. `nominatim search`
47 provides a replacement but returns different output.
51 ### Change of layout of search_name_* tables
53 The table need a different index for nearest place lookup. Recreate the
54 indexes using the following shell script:
57 for table in `psql -d nominatim -c "SELECT tablename FROM pg_tables WHERE tablename LIKE 'search_name_%'" -tA | grep -v search_name_blank`;
59 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))";
63 ### Removal of html output
65 The debugging UI is no longer directly provided with Nominatim. Instead we
66 now provide a simple Javascript application. Please refer to
67 [Setting up the Nominatim UI](../Setup-Nominatim-UI) for details on how to
70 The icons served together with the API responses have been moved to the
71 nominatim-ui project as well. If you want to keep the `icon` field in the
72 response, you need to set `CONST_MapIcon_URL` to the URL of the `/mapicon`
73 directory of nominatim-ui.
75 ### Change order during indexing
77 When reindexing places during updates, there is now a different order used
78 which needs a different database index. Create it with the following SQL command:
81 CREATE INDEX idx_placex_pendingsector_rank_address
83 USING BTREE (rank_address, geometry_sector)
84 WHERE indexed_status > 0;
87 You can then drop the old index with:
90 DROP INDEX idx_placex_pendingsector;
95 This index has been unused ever since the query using it was changed two years ago. Saves about 12GB on a planet installation.
98 DROP INDEX idx_placex_geometry_reverse_lookupPoint;
101 ### Switching to dotenv
103 As part of the work changing the configuration format, the configuration for
104 the website is now using a separate configuration file. To create the
105 configuration file, run the following command after updating:
108 ./utils/setup.php --setup-website
113 ### New Wikipedia/Wikidata importance tables
115 The `wikipedia_*` tables have a new format that also includes references to
116 Wikidata. You need to update the computation functions and the tables as
119 * download the new Wikipedia tables as described in the import section
120 * reimport the tables: `./utils/setup.php --import-wikipedia-articles`
121 * update the functions: `./utils/setup.php --create-functions --enable-diff-updates`
122 * create a new lookup index:
124 CREATE INDEX idx_placex_wikidata
126 USING BTREE ((extratags -> 'wikidata'))
127 WHERE extratags ? 'wikidata'
130 AND rank_search < 26;
132 * compute importance: `./utils/update.php --recompute-importance`
134 The last step takes about 10 hours on the full planet.
136 Remove one function (it will be recreated in the next step):
139 DROP FUNCTION create_country(hstore,character varying);
142 Finally, update all SQL functions:
145 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
150 ### Reorganisation of location_area_country table
152 The table `location_area_country` has been optimized. You need to switch to the
153 new format when you run updates. While updates are disabled, run the following
157 CREATE TABLE location_area_country_new AS
158 SELECT place_id, country_code, geometry FROM location_area_country;
159 DROP TABLE location_area_country;
160 ALTER TABLE location_area_country_new RENAME TO location_area_country;
161 CREATE INDEX idx_location_area_country_geometry ON location_area_country USING GIST (geometry);
162 CREATE INDEX idx_location_area_country_place_id ON location_area_country USING BTREE (place_id);
165 Finally, update all SQL functions:
168 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
173 ### New database connection string (DSN) format
175 Previously database connection setting (`CONST_Database_DSN` in `settings/*.php`) had the format
177 * (simple) `pgsql://@/nominatim`
178 * (complex) `pgsql://johndoe:secret@machine1.domain.com:1234/db1`
182 * (simple) `pgsql:dbname=nominatim`
183 * (complex) `pgsql:dbname=db1;host=machine1.domain.com;port=1234;user=johndoe;password=secret`
185 ### Natural Earth country boundaries no longer needed as fallback
188 DROP TABLE country_naturalearthdata;
191 Finally, update all SQL functions:
194 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
197 ### Configurable Address Levels
199 The new configurable address levels require a new table. Create it with the
203 ./utils/update.php --update-address-levels
208 ### New reverse algorithm
210 The reverse algorithm has changed and requires new indexes. Run the following
211 SQL statements to create the indexes:
214 CREATE INDEX idx_placex_geometry_reverse_lookupPoint
216 USING gist (geometry)
217 WHERE (name IS NOT null or housenumber IS NOT null or rank_address BETWEEN 26 AND 27)
218 AND class NOT IN ('railway','tunnel','bridge','man_made')
219 AND rank_address >= 26
220 AND indexed_status = 0
221 AND linked_place_id IS null;
222 CREATE INDEX idx_placex_geometry_reverse_lookupPolygon
223 ON placex USING gist (geometry)
224 WHERE St_GeometryType(geometry) in ('ST_Polygon', 'ST_MultiPolygon')
225 AND rank_address between 4 and 25
226 AND type != 'postcode'
228 AND indexed_status = 0
229 AND linked_place_id is null;
230 CREATE INDEX idx_placex_geometry_reverse_placeNode
231 ON placex USING gist (geometry)
233 AND rank_search between 5 and 25
235 AND type != 'postcode'
237 AND indexed_status = 0
238 AND linked_place_id is null;
241 You also need to grant the website user access to the `country_osm_grid` table:
244 GRANT SELECT ON table country_osm_grid to "www-user";
247 Replace the `www-user` with the user name of your website server if necessary.
249 You can now drop the unused indexes:
252 DROP INDEX idx_placex_reverse_geometry;
255 Finally, update all SQL functions:
258 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
265 A new separate table for artificially computed postcode centroids was introduced.
266 Migration to the new format is possible but **not recommended**.
268 Create postcode table and indexes, running the following SQL statements:
271 CREATE TABLE location_postcode
272 (place_id BIGINT, parent_place_id BIGINT, rank_search SMALLINT,
273 rank_address SMALLINT, indexed_status SMALLINT, indexed_date TIMESTAMP,
274 country_code varchar(2), postcode TEXT,
275 geometry GEOMETRY(Geometry, 4326));
276 CREATE INDEX idx_postcode_geometry ON location_postcode USING GIST (geometry);
277 CREATE UNIQUE INDEX idx_postcode_id ON location_postcode USING BTREE (place_id);
278 CREATE INDEX idx_postcode_postcode ON location_postcode USING BTREE (postcode);
279 GRANT SELECT ON location_postcode TO "www-data";
280 DROP TYPE IF EXISTS nearfeaturecentr CASCADE;
281 CREATE TYPE nearfeaturecentr AS (
284 rank_address smallint,
285 rank_search smallint,
293 Add postcode column to `location_area` tables with SQL statement:
296 ALTER TABLE location_area ADD COLUMN postcode TEXT;
299 Then reimport the functions:
302 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
305 Create appropriate triggers with SQL:
308 CREATE TRIGGER location_postcode_before_update BEFORE UPDATE ON location_postcode
309 FOR EACH ROW EXECUTE PROCEDURE postcode_update();
312 Finally populate the postcode table (will take a while):
315 ./utils/setup.php --calculate-postcodes --index --index-noanalyse
318 This will create a working database. You may also delete the old artificial
319 postcodes now. Note that this may be expensive and is not absolutely necessary.
320 The following SQL statement will remove them:
323 DELETE FROM place_addressline a USING placex p
324 WHERE a.address_place_id = p.place_id and p.osm_type = 'P';
325 ALTER TABLE placex DISABLE TRIGGER USER;
326 DELETE FROM placex WHERE osm_type = 'P';
327 ALTER TABLE placex ENABLE TRIGGER USER;