/**
* Return the database format version of the given database.
+ *
+ * @retval 0 on error
*/
unsigned int
notmuch_database_get_version (notmuch_database_t *database);
* fail with NOTMUCH_STATUS_UPGRADE_REQUIRED. This always returns
* FALSE for a read-only database because there's no way to upgrade a
* read-only database.
+ *
*/
notmuch_bool_t
notmuch_database_needs_upgrade (notmuch_database_t *database);