[PD] Fwd: [psql] object hand-holding

[Mike McGonagle]

---------- Forwarded message ----------
From: Mike McGonagle <mjmogo at gmail.com>
Date: Dec 10, 2007 1:07 PM
Subject: Re: [PD] [psql] object hand-holding
To: jamie at postlude.co.uk



On 12/10/07, Jamie Bullock <jamie at postlude.co.uk> wrote:
>
> Good point! I think Hans' recent suggestion addresses the problem. It
> also occurs to me that for Postgres at least, we have the PREPARE
> statement, which addresses the optimisation and injection issues you
> have raised. Technically [psql] already supports PREPARE except that
> PREPARE uses the '$' character as its placeholder identifier, and '$1'
> can't be passed around as a symbol in Pd. I think it might be
> interesting to use the '?' notation currently under discussion as an
> interface to PREPARE though.



One of the things that I have been reading on this is that when you use
these 'pre-complied' SQL statements, you need to 'bind' each of the
variables with their types to a specific function. (Also, I kind of like the
':' syntax, as it puts a name to the data within the statement.) I also
think that we would need to do something like


[insert into table (id, name) values (:id, :name) ( <-- sent to the cold
inlet
[bind :id float( <-- sent to hold inlet
[bind :name symbol( <-- sent to hold inlet


[:id 1 ( <-- sent to hold inlet
[:name john ( <-- sent to hold inlet
[bang ( <-- sent to hold inlet

and then we would be able to put all the data into the database with the
expected types. At least SQLite and libdbi use these 'bind' functions to
associate the expected datatype with the input data.


Mike




Jamie
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-- 
Peace may sound simple—one beautiful word— but it requires everything we
have, every quality, every strength, every dream, every high ideal.
—Yehudi Menuhin (1916–1999), musician


-- 
Peace may sound simple—one beautiful word— but it requires everything we
have, every quality, every strength, every dream, every high ideal.
—Yehudi Menuhin (1916–1999), musician
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