On Oct 24, 2009, at 2:50 PM, Tim Bunce wrote:

>  Callbacks are handled by the method dispatcher so all method names are
>  valid (so don't bother trying to list them in the docs :)
> 
>  Plus the two special cases for connect_cached: 'connect_cached.new'  
>  and
>  'connect_cached.reused'. (There's also '*' but that's not really  
>  recommended.)
> 
>  Thanks!
> 
>  Tim.
> 
>  p.s. Might be worth skimming through the archives
>  http://tinyurl.com/yl582mt

Thanks. Following up on [this post](http://markmail.org/message/fus3dfauxs6yz6sv 
), I wrote this code:

     my $dbh = DBI-> connect('dbi:Pg:dbname=bric', '', '', {
         Callbacks =>  {
             execute =>  sub { print "Set in DBH\n"; return; }
         }
     });

     my $sth = $dbh-> prepare('SELECT id FROM pref WHERE name = ?');
#    $sth-> {Callbacks}{execute} = sub { print "Set in STH\n"; return; };
     $sth-> execute('Time Zone');

It output nothing. When I uncommented that second-to-last line, it  
output "Set in STH". So it seems that a callback added to the dbh for  
a statement method name does not end up getting passed on to the  
statement handle. So I guess the Callbacks attribute is not passed on  
to statement handles created for the database handle? Seems a shame…

Best,

David