-- Fail when ISOK_QUERIES.First_Run is after Last_Run
UPDATE isok_queries
  SET first_run = last_run + '1 day'::INTERVAL
  WHERE iqname = 'query1';
ERROR:  new row for relation "isok_queries" violates check constraint "Last_Run must be >= First_Run"
DETAIL:  Failing row contains (query1, f, type1, f, Sun Jan 02 00:00:00 2000, Sat Jan 01 00:00:00 2000, null, null, VALUES ('R1', 'Result number 1', NULL)
                , ('R2', ..., No comment).