let sql = "select session_id from " + DB_TABLES.Participants + " w where w.participant_id = ? and participant_role =0 group by w.session_id";
let sys_session = "select session_id from " + DB_TABLES.Participants + " w where w.participant_id = 'system' and participant_role =0 group by w.session_id";
let sessionSQL = "select id, name, type, create_date,business_type, last_sender_id, last_sender_name, last_content_type, last_content, last_message_time,status from "
+ DB_TABLES.Sessions + " s where s.id in(" + sql + ") and s.id not in ("+sys_session+") and s.`status` = 0";
+ DB_TABLES.Sessions + " s where s.id in(" + sql + ") AND s.type in(" + type + ") and s.id not in ("+sys_session+") and s.`status` = 0";