*dbname* true false utf8 *dbprefix*external_mounts mount_id integer 0 true 1 6 mount_point text 128 true storage_backend text 64 true auth_backend text 64 true priority integer 100 4 true type integer 4 true *dbprefix*external_applicable applicable_id integer 0 true 1 6 mount_id integer true 6 type integer 4 true value text 64 applicable_mount mount_id ascending applicable_type_value type ascending value ascending applicable_type_value_mount true type ascending value ascending mount_id ascending *dbprefix*external_config config_id integer 0 true 1 6 mount_id integer true 6 key text true 64 value text true 4096 config_mount mount_id ascending config_mount_key true mount_id ascending key ascending *dbprefix*external_options option_id integer 0 true 1 6 mount_id integer true 6 key text true 64 value text true 256 option_mount mount_id ascending option_mount_key true mount_id ascending key ascending