Re: libpq and prepared statements progress for 8.0

From: "Merlin Moncure" <merlin(dot)moncure(at)rcsonline(dot)com>
To: "Greg Stark" <gsstark(at)mit(dot)edu>
Cc: <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: libpq and prepared statements progress for 8.0
Date: 2004-09-15 12:48:58
Message-ID: 6EE64EF3AB31D5448D0007DD34EEB3412A74AF@Herge.rcsinc.local
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> A bit of context here. The perl DBD::Pg developers are trying to
figure
> out
> how to implement prepared queries sanely. As it stands now they're
> basically
> writing off both binary prepared queries and SQL based prepared
queries as
> basically useless. It would be a shame to have a brand new binary
protocol
> but
> find it ignored by driver writers.
>
> The problem is that you want to be able to do
>
> $sth = $dbh->prepare("SELECT col_a FROM tab WHERE col_b = ?");
> $sth->execute(1);
> ...
>
> And not have to jump through hoops binding parameters to types and so
on.
>

suggestion: default to text type ('character varying') and overload your
prepare method to allow a vector of types for special cases. It follows
that if you don't know what type you are dealing with than it gets dealt
with as a string.

Question: what is the relevance of the binary protocol, are you trying
to send/fetch binary data via the command interface?

Merlin

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