Re: Multiple psql history files

"David G. Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> writes:
> On Tue, Oct 18, 2016 at 9:45 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> One interesting point, if you wish to consider history as being
>> connection-specific, is what happens during a \c command. Right
>> now the answer is "nothing" but you might wish it were different.

> ​Just to clarify/confirm a point inferred from the docs...
> If you place "\set HISTFILE​ ~/.psql_history- :DBNAME"
> ​into your .psqlrc file then when you perform a "\c" the .psqlrc file is
> re-read and the ​new value for DBNAME is used to generate a new history
> file name.

Um, no, I see no indication of that in the code. Where did you read that
in the docs?

If we wanted the history file to change at \c, I think the best way would
be to invent some escape-patterns that could be placed in the value of
HISTFILE, say along the lines of "\set HISTFILE ~/.psql_history-%h-%p",
and then specify that if the value contains any such patterns we'll dump
and reload the history file when reconnecting. But TBH I don't think
it's worth the trouble. I'd sure like to have seen multiple requests
for such functionality before we go to the trouble.

regards, tom lane