I wrote:
> I'm not enamored of "saved_file" either, it seems like the wrong
> part of speech somehow. Maybe "save_in_file"?
Actually ... what is the point of letting users control the filename at
all? It seems like the only useful nondefault value is the empty string
(to suppress storing the stats). So why not simplify this to a boolean?
"pg_stat_statements.save" = on or off.
regards, tom lane