-- USAGE:
--sudo -u postgres psql -v id_t=103 -v file="'/home/soltex/export/t_103.csv'" < export_sp.sql
copy (select 
    "date",
    well_depth,
    t_te.id_event,
    t_te.message_template,
    arg0 as old_value,
    arg1 as new_value
from t_telemetry_message t_tm
left join (select * from t_telemetry_event where id_telemetry = :id_t) t_te
    on t_te.id_event = t_tm.id_event
where t_tm.id_telemetry = :id_t and t_tm.id_event != 40
order by date)
to :file DELIMITER ';' CSV header ENCODING 'WIN1251';