Re: [Chicken-users] DBI

[Peter Bex]

On Thu, Feb 28, 2008 at 10:05:58AM -0500, Graham Fawcett wrote:
> >  Why the thunk? (why not directly the port?)
> 
> Laziness: it avoids the overhead of setting up the input port if it's
> not required. You might want to iterate over a set of (id, name, blob)
> records and only open the blob if the name meets some criteria that
> are local to the app (i.e. can't be expressed in a WHERE clause).

You can make a 'smart' custom port that only really opens the blob when
you first read from it (it has to be a custom port anyway, so this is
not too much extra work).  This makes for a more convenient API, IMHO.

Cheers,
Peter
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