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add migration hints for country table

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Sarah Hoffmann
2019-07-10 22:51:15 +02:00
parent be47cd2549
commit 927b4c928e
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docs/admin/Migration.md
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@@ -6,6 +6,22 @@ to newer versions of Nominatim.
SQL statements should be executed from the PostgreSQL commandline. Execute
`psql nominatim` to enter command line mode.
## 3.3.0 -> master
### 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);
```
## 3.2.0 -> 3.3.0