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add migration for 3.2 version

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Sarah Hoffmann 2018-08-26 17:27:31 +02:00
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docs/admin/Migration.md
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@ -6,6 +6,45 @@ to newer versions of Nominatim.
SQL statements should be executed from the postgres commandline. Execute
`psql nominiatim` to enter command line mode.
## 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) {ts:search-index}
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) {ts:search-index}
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) {ts:search-index}
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.
Finally, you can drop the now unused indexes:
```
DROP INDEX idx_placex_reverse_geometry;
```
## 3.0.0 -> 3.1.0
### Postcode Table