From: Warren Young
Date: September 21 2007 10:11pm
Subject: Re: Getting errnum() in exception?
List-Archive: http://lists.mysql.com/plusplus/7042
Message-Id: <46F44196.5050601@etr-usa.com>
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Jim Wallace wrote:
> I assume this is because when the BadQuery
> exception is constructed calls error() which calls mysql_error() but
> that clears out the errornum() (mysql_errno()).

Test this assumption before doing any work based on it.  Some of the 
reasons I'm skeptical:

- I don't see mention any such behavior in the MySQL C API docs

- I think I'd remember if MySQL++ cleared the error number itself

- Not all BadQuery exceptions carry the return value of 
Connection::error() as the message, so if you're catching one of those, 
the error number would already be meaningless

> If not, adding an unsigned int to the BadQuery exception class 

If you're going to do this, add it to every exception where it makes sense.