Re: Problem with reloading groups in pg_hba.conf

Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > Yes, that was the issue.  We tell people pg_hba.conf only gets reloaded
> > when they tell the postmaster to do it.  We can't have it happening at
> > random times, e.g. password change.
> 
> I agree on that: the signal should cause the postmaster to reload
> pg_pwd/pg_group info *only*.  So you cannot integrate the data from
> these files into the same datastructure as you use for pg_hba.conf;
> they have to be separate datastructures.
> 
> I think what you are really asking is whether to expand groups by
> substitution of user names during read of the file, vs doing it
> on-the-fly when accepting a connection.  On that I agree with Ross:
> better to move work out of the connection logic and into the file
> reread logic as much as possible.

Yes, I am doing that.  pg_group will be tokenized into username tokens,
and on connection, the mention of a group token in pg_hba.conf will
cause a spin through the pg_group tokens to find a matching groupname,
then it will look for the requested username. 

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