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added --clean deleted command to the documentation

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lujoh
2023-10-18 02:03:17 -04:00
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docs/admin/Maintenance.md
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@@ -60,16 +60,14 @@ to finish the recomputation.
## Removing large deleted objects ## Removing large deleted objects
Command: `nominatim admin --clean-deleted --age <PostgreSQL Time Interval>`
Nominatim refuses to delete very large areas because often these deletions are Nominatim refuses to delete very large areas because often these deletions are
accidental and are reverted within hours. Instead the deletions are logged in accidental and are reverted within hours. Instead the deletions are logged in
the `import_polygon_delete` table and left to the administrator to clean up. the `import_polygon_delete` table and left to the administrator to clean up.
There is currently no command to do that. You can use the following SQL To run this command you will need to pass a PostgreSQL time interval to the age
query to force a deletion on all objects that have been deleted more than parameter. For example to delete any objects that have been deleted more than a
a certain timespan ago (here: 1 month): month ago you would run:
`nominatim admin --clean-deleted --age '1 month'`
```sql
SELECT place_force_delete(p.place_id) FROM import_polygon_delete d, placex p
WHERE p.osm_type = d.osm_type and p.osm_id = d.osm_id
and age(p.indexed_date) > '1 month'::interval
```