[fpc-devel] TCustomConnection - why?
Michael Van Canneyt
michael at freepascal.org
Sat May 7 17:07:15 CEST 2005
On Sat, 7 May 2005, Joost van der Sluis wrote:
> > > I think that the idea behind TCustomConnection is the same of
> > > TDBDatabase. So I would suggest to implement all connect/disconnect
> > > stuff from TCustomConnection to TDBDatabase, and remove
> > > TCustomConnection.
> > >
> > > Or am I missing something?
> > You are.
> > First, TCustomConnection is there for Delphi compatibility,
> > so removing it would be a bad idea, it was put there to
> > allow tools as InstantObjects to compile.
> Create an alias to TDBDatabase or rename TDBDatabase to
> > Secondly, TDatabase can also simply be a directory (e.g. with
> > Dbase files), so it does not need 'connect' functionality,
> > which is why TCustomConnection is a descendent and not an alias.
> > TDatabase is (loosely said) something that binds various datasets
> > together. TCustomConnection is for actual client/server things.
> > In this sense, e.g. TSQLConnection should be a descendent of
> > TCustomConnection instead of TDatabase. But I didn't have time
> > yet to discuss that with you.
> > (too busy with the 2.0 docs, which are now finished BTW, so
> > you can start firing questions...)
> There's a difference between TDatabase and TDBDatabase. Now it is:
> TDatabase - TDBDatabase - TSQLConnection.
> So I think that the idea behind TDBDatabase is the same as
> (The TDBDatabase also has transactions and datasets assigned to it, so
> that if the TDBdatabase closes, all transactions and datasets are closed
> and such)
MMMMyes. In that case we should make TCustomConnection an alias for TDBDatabase.
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