davisp commented on a change in pull request #2666: soft-deletion for database
URL: https://github.com/apache/couchdb/pull/2666#discussion_r398820068
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File path: src/fabric/src/fabric2_fdb.erl
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@@ -346,12 +350,68 @@ delete(#{} = Db) ->
} = ensure_current(Db),
DbKey = erlfdb_tuple:pack({?ALL_DBS, DbName}, LayerPrefix),
- erlfdb:clear(Tx, DbKey),
- erlfdb:clear_range_startswith(Tx, DbPrefix),
+ DoRecovery = fabric2_util:do_recovery(),
+ case DoRecovery of
+ true ->
+ Timestamp = list_to_binary(fabric2_util:iso8601_timestamp()),
+ DeletedDbKey = erlfdb_tuple:pack({?DELETED_DBS, DbName, Timestamp},
+ LayerPrefix),
+ erlfdb:set(Tx, DeletedDbKey, DbPrefix),
Review comment:
It just occurred to me, we need to read the `DeletedDbKey` and make sure
that it comes back `not_found` or else we end up losing references to deleted
databases if users create/delete databases too quickly.
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