" LEFT JOIN sip_address AS from_sip_address ON from_sip_address.id = from_sip_address_id"
" LEFT JOIN sip_address AS to_sip_address ON to_sip_address.id = to_sip_address_id"
" LEFT JOIN sip_address AS device_sip_address ON device_sip_address.id = device_sip_address_id"
" LEFT JOIN sip_address AS participant_sip_address ON participant_sip_address.id = participant_sip_address_id"
" WHERE conference_event_view.id IN (SELECT event_id FROM conference_chat_message_event WHERE direction = :direction AND delivery_notification_required <> 0)";