Pardon the top-posting, but I'd rather get the answer up front instead
of buried deep in the chain.
Turns out I was wrong - I got my test scripts crossed. Removing the ()
did not fix the problem.
However, it did make me think a little and once I got into the
debugger, I figured out what really happened. The subclassed module
does not do subclassing properly - it takes the result of a
DBI->connect and just reblesses it. I guess its a minor miracle that
anything works at all.
I got the disconnect to work by doing a
bless($dbh,"DBI::db");
just before the disconnect.
So, we are going to add a disconnect method to the subclass class that
does just that. It's ugly and kludgy, but going back and rewriting
MDISS::DB properly would require cycles that we just don't have.
On 5/23/05, Matthew Persico <[EMAIL PROTECTED]> wrote:
> On 5/23/05, Matthew Persico <[EMAIL PROTECTED]> wrote:
> > On 5/23/05, Hemanth Kumar <[EMAIL PROTECTED]> wrote:
> > > What happens when you replace $dbh->disconnect(); with $dbh->disconnect;
> > >
> > > hth
> > > Hemanth
> > >
> >
> > Son-of-a-monkey's-uncle, that worked!
> >
> > Okay, now I'm lost. Does anyone want to explain this behavior? The
> > best that I can come up with is that:
> > 1) there is some deep magic in DBI
> > 2) the () changes the signature of the disconnect call in such a way
> > that it does not match the prototype given in DBI and that since
> > MDISS::DB is a subclass of DBI and not a DBI, we've confused perl in a
> > bizzare way.
>
> 3) The () force a lookup for a function. Without the parens, the
> lookup is free to find the function reference which points to the
> implementation in the appropriate DBD?
>
> > >
> > > -Original Message-
> > > From: Matthew Persico [mailto:[EMAIL PROTECTED]
> > > Sent: Monday, May 23, 2005 10:27 AM
> > > To: dbi-users@perl.org
> > > Subject: Re: DBI->disconnect is not a DBI method. Read the DBI manual.
> > > at ff.pl line 224
> > >
> > > On 5/20/05, Tim Bunce <[EMAIL PROTECTED]> wrote:
> > > > On Fri, May 20, 2005 at 10:08:36AM -0400, Matthew Persico wrote:
> > > > > Has anyone ever seen this message? I have a valid handle - all of my
> > >
> > > > > database commands work. The command is simply
> > > > >
> > > > > $dbh->disconnect();
> > > >
> > > > I'd guess that $dbh contains the string "DBI".
> > > >
> > > > Tim.
> > > >
> > >
> > > That was a rather sparse message I posted Friday. A few more details are
> > > in order. If anyone has any ideas after reading this, thanks in advance.
> > >
> > > Perl 5.6.1
> > > DBI 1.37
> > > DBD::Sybase 1.00
> > >
> > > Yes, I am stuck with these versions (esp. Perl) for the foreseable
> > > future.
> > >
> > > The connection is created in a module I have inherited (consultant long
> > > gone...) called MDISS::DB that contains, among other things, this
> > > code:
> > >
> > > BEGIN { # setup as a subclass of DBI
> > > @MDISS2::DB::EXPORT = (@DBI::EXPORT);
> > > @MDISS2::DB::EXPORT_OK = (@DBI::EXPORT_OK);
> > > @MDISS2::DB::EXPORT_TAGS = (@DBI::EXPORT_TAGS);
> > > @MDISS2::DB::ISA = qw(DBI DBI::db Exporter);
> > > @MDISS2::DB::db::ISA = qw(DBI::db MDISS2::DB Exporter);
> > > @MDISS2::DB::st::ISA = qw(DBI::st MDISS2::DB Exporter);
> > > DBI::init_rootclass('MDISS2::DB');
> > > }
> > >
> > > and this code:
> > >
> > > sub new {
> > >
> > > my %args = ();
> > > my $proto = undef;
> > >
> > > if (scalar(@_)) {
> > > ($proto, %args) = @_;
> > > }
> > >
> > > my %clone = ();
> > > my $class = undef;
> > > my $self = undef;
> > > my $private = undef;
> > > my %login = ();
> > > my $n = undef;
> > >
> > > $n = 'MDISS2::DB->new()';
> > >
> > > =item legacy code
> > >
> > > my($proto, %args, %clone, $class, $self, $private, %login, $n) = @_;
> > >
> > > =cut
> > >
> > > %clone = ();
> > > if(ref($proto)) {
> > > if($proto->can('_private')) {
> > > $private = $proto->_private();
> > > if(exists($private->{'login'})) {
> > > %clone = %{$private->{'login'}};
> > > if(exists($clone{'driver'}) &&
> > > exists($args{'driver'})) {
> > > croak("$n - cannot clone
> > > '$args{'driver'}' from '$clone{'driver'}'")
> > >
> > > unless(uc($args{'driver'}) eq uc($clone{'driver'}));
> > > }
> > > }
> > > }
> > > } #endif
> > >
> > >
> > > $args{'driver'} = ucfirst(lc($args{'driver'})) || 'Sybase';
> > > if($args{'driver'} eq 'Oracle') {
> > > %login = mdiss_oracle_login(%clone, %args);
> > > } else {
> > > %login = mdiss_sybase_login(%args);
> > > }
> > > # print Dumper(%login);
> > >
> > > ### This connectDBI is a
