notes/db/sql/postgres/feature/dml/wrapping.txt

https://edu.postgrespro.ru/sqlprimer/sqlprimer-2019-msu-05.pdf
    ! p18, p28

with update_row as
(update aircrafts_tmp
  set range = range * 1.2
  where model ~ '^Bom'
  returning *
) -- usefull work
insert into aircrafts_log
select ur.aircraft_code, ur.model, ur.range,
current_timestamp, 'UPDATE'
from update_row ur;
-- writing into log

INSERT 0 1

important: main query can access updated data only throught the temporary table, created by "returning ...".
(... from update_row ur;)


with delete_row as
(delete from aircrafts_tmp
  where model ~ '^Bom'
  returning *
)
insert into aircrafts_log
select dr.aircraft_code, dr.model, dr.range,
current_timestamp, 'DELETE'
from delete_row dr;

INSERT 0 1