Re: 2 forks for md5?

Tom Lane wrote:

>Andrew Dunstan <andrew@dunslane.net> writes:
>  
>
>>Confusion fixed (thanks, Tom). psql (via libpq) tries twice, if not 
>>given a password to begin with (via .pgpass or psql's -W).
>>Ugly but at least not incomprehensible.
>>    
>>
>
>This seems reasonable behavior when prompting for a password from the
>user, since that's going to take a lot of time anyway.  I'm not sure
>whether libpq should try to excavate a password from ~/.pgpass in
>advance of being told by the server that one is needed.
>
>An ideal solution might be to read ~/.pgpass during the bit of code that
>handles a password challenge from the server, rather than in the "outer
>loop".  Not having looked at the libpq code recently, I have no idea how
>painful that would be to do.
>  
>

Actually, it looks to me like the cause is some code in psql/startup.c 
which keeps trying to make a connection while it gets 
PQnoPasswordSupplied. libpq seemed to work just fine, picking up pgpass 
before a connection was attempted.

My only real concern is that when you turn on log_connections the traces 
are confusing - from the user's perspective there is only one 
connection, and there are two mentioned in the log, one of which doesn't 
have a correspondingly logged disconnect. Maybe worth a mention in the docs?

cheers

andrew