date = notmuch_message_get_header (message, "date");
time_value = notmuch_parse_date (date, NULL);
doc.add_value (NOTMUCH_VALUE_DATE,
Xapian::sortable_serialise (time_value));
date = notmuch_message_get_header (message, "date");
time_value = notmuch_parse_date (date, NULL);
doc.add_value (NOTMUCH_VALUE_DATE,
Xapian::sortable_serialise (time_value));