On Sun, 4 Jun 2000, Tim Bunce wrote:
> On Sat, Jun 03, 2000 at 02:49:47AM +0300, Stas Bekman wrote:
> > On Fri, 2 Jun 2000, Perrin Harkins wrote:
> >
> > > On Sat, 3 Jun 2000, Stas Bekman wrote:
> > > > * install_driver (2):
> > > > DBI->install_driver("mysql");
> > >
> > > I've never seen that before,
> >
> > There is always a first time :)
> >
> > > and it isn't in the DBI perldoc.
> >
> > Where do you think I've found it :) It is mentioned in DBI manpage:
> >
> > DBI->connect automatically installs the driver if it
> > has not been installed yet. Driver installation always
> > returns a valid driver handle or it dies with an error
> > message which includes the string 'install_driver' and
> > the underlying problem. So, DBI->connect will die on a
> > driver installation failure and will only return undef
> > on a connect failure, for which $DBI::errstr will hold
> > the error.
>
> I've been meaning to document it properly for the last couple of
> years, since I knew people were using it for mod_perl.
I guess most of the mod_perl folks don't use it, since they don't
know about it. I have discovered it following the Vivek's reply.
> > but actualy it's the DBD:: method.
>
> Nope. A DBI->method.
Ok
> > > Is it safer than "use DBD::mysql;"?
> >
> > "safer" is the wrong question. It's always used by DBI, but when you call
> > it at the server startup you get a few more K shared, compared with only
> > preloading of DBD::mysql.
>
> Yes, and the semantics of install_driver are that it'll die if the driver
> can't be installed, just like 'use'.
>
> > Apache::DBI->connect_on_init('DBI:mysql:test::localhost', [...]
> > or DBI->disconnect("Cannot connect to database: $DBI::errstr\n");
>
> There's no such method as DBI->disconnect.
Ouch, you are right. But the first part has never failed for me, so I copy
and paste this old error for years :) Thanks for telling me!
_____________________________________________________________________
Stas Bekman JAm_pH -- Just Another mod_perl Hacker
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