X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/b8f7563da9656b9f07e6fefbb8ddae12badda717..5b20fa7e38d81d0a7e63aaf3c64c3ab80916ff38:/docs/admin/Migration.md

diff --git a/docs/admin/Migration.md b/docs/admin/Migration.md
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--- a/docs/admin/Migration.md
+++ b/docs/admin/Migration.md
@@ -1,13 +1,171 @@
-Database Migrations
-===================
+# Database Migrations
 
 This page describes database migrations necessary to update existing databases
 to newer versions of Nominatim.
 
-SQL statements should be executed from the postgres commandline. Execute
-`psql nominiatim` to enter command line mode.
+SQL statements should be executed from the PostgreSQL commandline. Execute
+`psql nominatim` to enter command line mode.
 
-# 3.0.0 -> 3.1.0
+## 3.5.0 -> master
+
+### Change order during indexing
+
+When reindexing places during updates, there is now a different order used
+which needs a different database index. Create it with the following SQL command:
+
+```sql
+CREATE INDEX idx_placex_pendingsector_rank_address
+  ON placex USING BTREE (rank_address, geometry_sector) where indexed_status > 0;
+```
+
+You can then drop the old index with:
+
+```sql
+DROP INDEX idx_placex_pendingsector
+```
+
+
+### Switching to dotenv
+
+As part of the work changing the configuration format, the configuration for
+the website is now using a separate configuration file. To create the
+configuration file, run the following command after updating:
+
+```sh
+./utils/setup.php --setup-website
+```
+
+## 3.4.0 -> 3.5.0
+
+### New Wikipedia/Wikidata importance tables
+
+The `wikipedia_*` tables have a new format that also includes references to
+Wikidata. You need to update the computation functions and the tables as
+follows:
+
+  * download the new Wikipedia tables as described in the import section
+  * reimport the tables: `./utils/setup.php --import-wikipedia-articles`
+  * update the functions: `./utils/setup.php --create-functions --enable-diff-updates`
+  * compute importance: `./utils/update.php --recompute-importance`
+
+The last step takes about 10 hours on the full planet.
+
+Remove one function (it will be recreated in the next step):
+
+```sql
+DROP FUNCTION create_country(hstore,character varying);
+```
+
+Finally, update all SQL functions:
+
+```sh
+./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
+```
+
+## 3.3.0 -> 3.4.0
+
+### Reorganisation of location_area_country table
+
+The table `location_area_country` has been optimized. You need to switch to the
+new format when you run updates. While updates are disabled, run the following
+SQL commands:
+
+```sql
+CREATE TABLE location_area_country_new AS
+  SELECT place_id, country_code, geometry FROM location_area_country;
+DROP TABLE location_area_country;
+ALTER TABLE location_area_country_new RENAME TO location_area_country;
+CREATE INDEX idx_location_area_country_geometry ON location_area_country USING GIST (geometry);
+CREATE INDEX idx_location_area_country_place_id ON location_area_country USING BTREE (place_id);
+```
+
+Finally, update all SQL functions:
+
+```sh
+./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
+```
+
+## 3.2.0 -> 3.3.0
+
+### New database connection string (DSN) format
+
+Previously database connection setting (`CONST_Database_DSN` in `settings/*.php`) had the format
+
+   * (simple) `pgsql://@/nominatim`
+   * (complex) `pgsql://johndoe:secret@machine1.domain.com:1234/db1`
+
+The new format is
+
+   * (simple) `pgsql:dbname=nominatim`
+   * (complex) `pgsql:dbname=db1;host=machine1.domain.com;port=1234;user=johndoe;password=secret`
+
+### Natural Earth country boundaries no longer needed as fallback
+
+```
+DROP TABLE country_naturalearthdata;
+```
+
+Finally, update all SQL functions:
+
+```sh
+./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
+```
+
+### Configurable Address Levels
+
+The new configurable address levels require a new table. Create it with the
+following command:
+
+```sh
+./utils/update.php --update-address-levels
+```
+
+## 3.1.0 -> 3.2.0
+
+### New reverse algorithm
+
+The reverse algorithm has changed and requires new indexes. Run the following
+SQL statements to create the indexes:
+
+```
+CREATE INDEX idx_placex_geometry_reverse_lookupPoint
+  ON placex USING gist (geometry)
+  WHERE (name is not null or housenumber is not null or rank_address between 26 and 27)
+    AND class not in ('railway','tunnel','bridge','man_made')
+    AND rank_address >= 26 AND indexed_status = 0 AND linked_place_id is null;
+CREATE INDEX idx_placex_geometry_reverse_lookupPolygon
+  ON placex USING gist (geometry)
+  WHERE St_GeometryType(geometry) in ('ST_Polygon', 'ST_MultiPolygon')
+    AND rank_address between 4 and 25 AND type != 'postcode'
+    AND name is not null AND indexed_status = 0 AND linked_place_id is null;
+CREATE INDEX idx_placex_geometry_reverse_placeNode
+  ON placex USING gist (geometry)
+  WHERE osm_type = 'N' AND rank_search between 5 and 25
+    AND class = 'place' AND type != 'postcode'
+    AND name is not null AND indexed_status = 0 AND linked_place_id is null;
+```
+
+You also need to grant the website user access to the `country_osm_grid` table:
+
+```
+GRANT SELECT ON table country_osm_grid to "www-user";
+```
+
+Replace the `www-user` with the user name of your website server if necessary.
+
+You can now drop the unused indexes:
+
+```
+DROP INDEX idx_placex_reverse_geometry;
+```
+
+Finally, update all SQL functions:
+
+```sh
+./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions
+```
+
+## 3.0.0 -> 3.1.0
 
 ### Postcode Table
 
@@ -26,6 +184,17 @@ CREATE INDEX idx_postcode_geometry ON location_postcode USING GIST (geometry);
 CREATE UNIQUE INDEX idx_postcode_id ON location_postcode USING BTREE (place_id);
 CREATE INDEX idx_postcode_postcode ON location_postcode USING BTREE (postcode);
 GRANT SELECT ON location_postcode TO "www-data";
+drop type if exists nearfeaturecentr cascade;
+create type nearfeaturecentr as (
+  place_id BIGINT,
+  keywords int[],
+  rank_address smallint,
+  rank_search smallint,
+  distance float,
+  isguess boolean,
+  postcode TEXT,
+  centroid GEOMETRY
+);
 ```
 
 Add postcode column to `location_area` tables with SQL statement: