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Re: pg_last_error() doesn't return connection errors

From: Andrew McMillan <andrew(at)morphoss(dot)com>
To: Frank Naude <naudefj(at)gmail(dot)com>
Cc: pgsql-php(at)postgresql(dot)org
Subject: Re: pg_last_error() doesn't return connection errors
Date: 2010-08-26 22:44:33
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-php
On Thu, 2010-08-26 at 13:44 +0200, Frank Naude wrote:
> Hi,
> I can successfully connect to PostgreSQL (pgsql extension). However,
> when I make a deliberate mistake, I'm unable to capture the connection
> error with pg_last_error() as one would with the *_last_error()
> functions of other database extensions.
> Here is an example:
> <?php
> $c = pg_connect('host= user=postgres password=xxx
> dbname=yyy') or var_dump( pg_last_error() );
> ?>
> The following output (with warnings) is returned:
> Warning: pg_connect() []: Unable to connect to
> PostgreSQL server: FATAL: password authentication failed for user
> "postgres" in ..
> Warning: pg_last_error() []: No PostgreSQL link
> opened yet in ...
> bool(false)
> One would expect pg_last_error() to return "password authentication
> failed" instead of FALSE!

Hi Frank,

Presumably pg_last_error() doesn't do anything useful until after the
database connection has been made...

That behaviour doesn't seem particularly unnatural to me, really, though
this seems an unlikely place to be posting a bug about it.  If it's a
problem for you perhaps you should file a bug with the developer.

Alternatively, does pg_errormessage() have the same flaw, or does that
give you the error details that you're after?  That's what I use in my
own code, although I note that in my own code I only log the fact of
connection failure, without logging the reason, and I use that for
getting the error when a query fails.  Perhaps something I should
improve :-)


andrew (AT) morphoss (DOT) com                            +64(272)DEBIAN
         Flexibility is overrated.  Constraints are liberating.

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