[PD-dev] Fwd: Fwd: Fwd: Connecting up an SQL Database to PD

[Mike McGonagle]

On 11/13/07, Frank Barknecht <fbar at footils.org> wrote:
> Hallo,
> Jamie Bullock hat gesagt: // Jamie Bullock wrote:
>
> > > I would think that making it such that it acted like 'textfile', that
> > > with each bang sent to the sql object, that it would return each
> > > subsequent row, and once the end of that set is reached, it would
> > > output a bang on a second outlet, similar to what 'textfile' does.
> > >
> >
> > Good idea! I'll add that too.
>
> Actually I thought about this, too, but I'm not sure if it's really
> useful. One of the strengths of SQL is, that you can limit the result
> set manually. So if I'd want one row at a time, I'd design my SQL
> query as such using LIMIT, and if I want more rows, I'd just use a
> different LIMIT clause. Hardcoding this into the SQL class in my view
> doesn't make much sense. (Using the last outlet to signal the end of
> results like in [textfile] does make sense, though.)

Frank, this isn't hardcoding anything into the external. Any select
query on a database has the potential of returning a single row, or a
billion. The point of this is that each row contains a different set
of data, and the PD program would process them sequentially. Getting
all the rows at once would be very cumbersome programming in sorting
out the data. Being able to process each row by itself is a little bit
less daunting. Also, if you only get one row at a time from the
database, that would be a LOT of querying, and the amount of time for
each query might slow the system quite a bit.

Mike


>
> Ciao
> --
>  Frank Barknecht                                     _ ______footils.org__
>
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