Changes in DBI 1.16, 30th May 2001
Added note to data_sources() method docs that some drivers may
require a connected database handle to be supplied as an attribute.
Tim.
On Sun, Jun 10, 2001 at 03:36:12PM -0700, Jonathan Leffler wrote:
> Michael Peppler wrote:
>
> > Curt Russell Crandall writes:
> > > I didn't have an Informix DB available at the time, but yes it does return
> > > a list of dbs with data_sources... however, Sybase does not as well as
> > > many others.
> >
> > DBD::Sybase could be made to return the list of known servers (from
> > the interfaces file), but not the list of databases, as that requires
> > connecting to each of the servers in the interfaces file (and we need
> > to know user/pwd for each server, etc - gets a little hairy).
>
> We had a discussion about this on the dbi-users mailing list during February 2000, in
> the run-up to the release of DBI 1.14. Tim promised to look into it, but either came
> up with a negative decision without notifying us or (much more likely) overlooked a
> comparatively minor feature that only impacts a few database servers...
>
> == quote 1 ==
> Subject: Re: DBI->data_sources() - assumption of anonymous user is a bug
> Date: Wed, 09 Feb 2000 20:41:54 -0800
> From: Jonathan Leffler <[EMAIL PROTECTED]>
> To: Randall Whitman <[EMAIL PROTECTED]>
> CC: [EMAIL PROTECTED]
>
> Randall Whitman wrote:
>
> > We consider the assumption of an anonymous user to be a bug --
> > that is, the behavior that
> > DBI->data_sources("mysql");
> > returns an empty array because we do not have an anonymous
> > user in MySQL.
> >
> > In other words, it should be possible to do one of the following:
> >
> > @databases = DBI->data_sources("mysql", "USER", "PASSWORD"); ## or...
> >
> > $dbh = DBI->connect("dbi:mysql:", "USER", "PASSWORD");
> > @databases = $dbh->data_sources("mysql");
>
> I sympathize with this; the last remaining test the DBD::Informix 1.00
> pre-releases sometimes skip (instead of failing as in earlier versions)
> is the data sources test, and it too is because there is no user
> information available even though it can be needed to connect to the
> database server to obtain the list of databases.
>
> I note in passing that if you do the connection first, DBD::Informix
> will generate a list of data sources OK, but the whole point of the
> data sources method is to find out what's available before formally
> connecting to one of the available data sources.
>
> Please can we modify DBI 1.14 to handle this, Tim?
> It looks like a simple, backwards compatible extension to me...
>
>
> > I realize that implementation of such would require support from the
> > actual driver module, but currently the DBI does not provide a way
> > to use such a feature. I have posted a note regarding this issue
> > to [EMAIL PROTECTED] [...]
>
> > [from msql-mysql-modules]
> >
> > > We consider the assumption of an anonymous user in listdbs to be a bug.
> > ..
> > I agree with you, but I refuse to support listdbs, as there is
> > the portable DBI->data_sources(). IMO the better way to go
> > is the support for user names and passwords with the data_sources
> > method. If you are interested in that, please contact Tim Bunce.
> > ..
> > Thanks, Jochen
>
> == end quote 1 ==
>
> == quote 2 ==
> Date: Thu, 10 Feb 2000 10:11:23 +0000
> From: Tim Bunce <[EMAIL PROTECTED]>
> To: Jonathan Leffler <[EMAIL PROTECTED]>
> CC: Randall Whitman <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
>
> On Wed, Feb 09, 2000 at 08:41:54PM -0800, Jonathan Leffler wrote:
> > Please can we modify DBI 1.14 to handle this, Tim?
> > It looks like a simple, backwards compatible extension to me...
>
> I'll look into it.
>
> Tim.
>
> == end quote 2 ==
>
>
>
> > > On Thu, 7 Jun 2001, Jonathan Leffler wrote:
> > > > Curt Russell Crandall wrote:
> > > > > Is the DBI->data_sources method the only facility available in the DBI to
> > > > > get a list of databases on a server? [...]
>
> > > > > Sybase won't return anything with data_sources and I'm not
> > > > > sure if Informix will either... those are the 2 dbs I'm concerned with [...]
> >
> > > >
> > > > Have you tried using data_sources with DBD::Informix? [...]
>
> --
> Jonathan Leffler ([EMAIL PROTECTED], [EMAIL PROTECTED])
> Guardian of DBD::Informix 1.00.PC1 -- see http://www.cpan.org/
> #include <disclaimer.h>
>
