On Tue, Feb 26, 2019 at 11:59 AM Pepe TD Vo <pepevo@xxxxxxxxx> wrote: > postgres=# select pg_conf_load_time() > modification from pg_stat_file('pg_hba.conf'): > ?column? > ---------- > f > (1 row) > > Can you tell me what "f" mean? Your query has an inequality (comparison) expression for its only column - the result of which can be only: true, false, or NULL. The "f" means false. David J.