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 ### Removal of html output
13 The debugging UI is no longer directly provided with Nominatim. Instead we
14 now provide a simple Javascript application. Please refer to
15 [Setting up the Nominatim UI](../Setup-Nominatim-UI) for details on how to
18 The icons served together with the API responses have been moved to the
19 nominatim-ui project as well. If you want to keep the `icon` field in the
20 response, you need to set `CONST_MapIcon_URL` to the URL of the `/mapicon`
21 directory of nominatim-ui.
23 ### Change order during indexing
25 When reindexing places during updates, there is now a different order used
26 which needs a different database index. Create it with the following SQL command:
29 CREATE INDEX idx_placex_pendingsector_rank_address
30 ON placex USING BTREE (rank_address, geometry_sector) where indexed_status > 0;
33 You can then drop the old index with:
36 DROP INDEX idx_placex_pendingsector
41 This index has been unused ever since the query using it was changed two years ago. Saves about 12GB on a planet installation.
44 DROP INDEX idx_placex_geometry_reverse_lookupPoint
47 ### Switching to dotenv
49 As part of the work changing the configuration format, the configuration for
50 the website is now using a separate configuration file. To create the
51 configuration file, run the following command after updating:
54 ./utils/setup.php --setup-website
59 ### New Wikipedia/Wikidata importance tables
61 The `wikipedia_*` tables have a new format that also includes references to
62 Wikidata. You need to update the computation functions and the tables as
65 * download the new Wikipedia tables as described in the import section
66 * reimport the tables: `./utils/setup.php --import-wikipedia-articles`
67 * update the functions: `./utils/setup.php --create-functions --enable-diff-updates`
68 * create a new lookup index:
70 CREATE INDEX idx_placex_wikidata on placex
71 USING BTREE ((extratags -> 'wikidata'))
72 WHERE extratags ? 'wikidata' and class = 'place' and osm_type = 'N' and rank_search < 26
74 * compute importance: `./utils/update.php --recompute-importance`
76 The last step takes about 10 hours on the full planet.
78 Remove one function (it will be recreated in the next step):
81 DROP FUNCTION create_country(hstore,character varying);
84 Finally, update all SQL functions:
87 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
92 ### Reorganisation of location_area_country table
94 The table `location_area_country` has been optimized. You need to switch to the
95 new format when you run updates. While updates are disabled, run the following
99 CREATE TABLE location_area_country_new AS
100 SELECT place_id, country_code, geometry FROM location_area_country;
101 DROP TABLE location_area_country;
102 ALTER TABLE location_area_country_new RENAME TO location_area_country;
103 CREATE INDEX idx_location_area_country_geometry ON location_area_country USING GIST (geometry);
104 CREATE INDEX idx_location_area_country_place_id ON location_area_country USING BTREE (place_id);
107 Finally, update all SQL functions:
110 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
115 ### New database connection string (DSN) format
117 Previously database connection setting (`CONST_Database_DSN` in `settings/*.php`) had the format
119 * (simple) `pgsql://@/nominatim`
120 * (complex) `pgsql://johndoe:secret@machine1.domain.com:1234/db1`
124 * (simple) `pgsql:dbname=nominatim`
125 * (complex) `pgsql:dbname=db1;host=machine1.domain.com;port=1234;user=johndoe;password=secret`
127 ### Natural Earth country boundaries no longer needed as fallback
130 DROP TABLE country_naturalearthdata;
133 Finally, update all SQL functions:
136 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
139 ### Configurable Address Levels
141 The new configurable address levels require a new table. Create it with the
145 ./utils/update.php --update-address-levels
150 ### New reverse algorithm
152 The reverse algorithm has changed and requires new indexes. Run the following
153 SQL statements to create the indexes:
156 CREATE INDEX idx_placex_geometry_reverse_lookupPoint
157 ON placex USING gist (geometry)
158 WHERE (name is not null or housenumber is not null or rank_address between 26 and 27)
159 AND class not in ('railway','tunnel','bridge','man_made')
160 AND rank_address >= 26 AND indexed_status = 0 AND linked_place_id is null;
161 CREATE INDEX idx_placex_geometry_reverse_lookupPolygon
162 ON placex USING gist (geometry)
163 WHERE St_GeometryType(geometry) in ('ST_Polygon', 'ST_MultiPolygon')
164 AND rank_address between 4 and 25 AND type != 'postcode'
165 AND name is not null AND indexed_status = 0 AND linked_place_id is null;
166 CREATE INDEX idx_placex_geometry_reverse_placeNode
167 ON placex USING gist (geometry)
168 WHERE osm_type = 'N' AND rank_search between 5 and 25
169 AND class = 'place' AND type != 'postcode'
170 AND name is not null AND indexed_status = 0 AND linked_place_id is null;
173 You also need to grant the website user access to the `country_osm_grid` table:
176 GRANT SELECT ON table country_osm_grid to "www-user";
179 Replace the `www-user` with the user name of your website server if necessary.
181 You can now drop the unused indexes:
184 DROP INDEX idx_placex_reverse_geometry;
187 Finally, update all SQL functions:
190 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
197 A new separate table for artificially computed postcode centroids was introduced.
198 Migration to the new format is possible but **not recommended**.
200 Create postcode table and indexes, running the following SQL statements:
203 CREATE TABLE location_postcode
204 (place_id BIGINT, parent_place_id BIGINT, rank_search SMALLINT,
205 rank_address SMALLINT, indexed_status SMALLINT, indexed_date TIMESTAMP,
206 country_code varchar(2), postcode TEXT,
207 geometry GEOMETRY(Geometry, 4326));
208 CREATE INDEX idx_postcode_geometry ON location_postcode USING GIST (geometry);
209 CREATE UNIQUE INDEX idx_postcode_id ON location_postcode USING BTREE (place_id);
210 CREATE INDEX idx_postcode_postcode ON location_postcode USING BTREE (postcode);
211 GRANT SELECT ON location_postcode TO "www-data";
212 drop type if exists nearfeaturecentr cascade;
213 create type nearfeaturecentr as (
216 rank_address smallint,
217 rank_search smallint,
225 Add postcode column to `location_area` tables with SQL statement:
228 ALTER TABLE location_area ADD COLUMN postcode TEXT;
231 Then reimport the functions:
234 ./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
237 Create appropriate triggers with SQL:
240 CREATE TRIGGER location_postcode_before_update BEFORE UPDATE ON location_postcode
241 FOR EACH ROW EXECUTE PROCEDURE postcode_update();
244 Finally populate the postcode table (will take a while):
247 ./utils/setup.php --calculate-postcodes --index --index-noanalyse
250 This will create a working database. You may also delete the old artificial
251 postcodes now. Note that this may be expensive and is not absolutely necessary.
252 The following SQL statement will remove them:
255 DELETE FROM place_addressline a USING placex p
256 WHERE a.address_place_id = p.place_id and p.osm_type = 'P';
257 ALTER TABLE placex DISABLE TRIGGER USER;
258 DELETE FROM placex WHERE osm_type = 'P';
259 ALTER TABLE placex ENABLE TRIGGER USER;