From: David Hinkle <drachs@gmail.com>
To: pgsql-interfaces@postgresql.org
Subject: Re: libpq, PQExecParams and the inserting of binary data
Date: Fri, 3 Jun 2005 13:04:11 -0500
Message-ID: <ae830e6c0506031104140a2b35@mail.gmail.com> (raw)
In-Reply-To: <6424.1117820918@sss.pgh.pa.us>
References: <ae830e6c05060309182201f85b@mail.gmail.com>
<6424.1117820918@sss.pgh.pa.us>
I read all the examples and documentation thouroughly. I would not
bother you guys otherwise. That example doesn't show you how to use
any binary parameters... All the parameters are text, it only shows
you how get binary results. I think it's a huge oversight myself.
I could probably figure out how to use the parameters as binary, but I
have no idea what to do with the OID field.
David
On 6/3/05, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> David Hinkle <drachs@gmail.com> writes:
> > As you can see, I assumed I could use PQexapeBytea to escape the
> > binary data and then just use the returned value as a text parameter.
>
> No, because PQescapeBytea is designed to do the escaping that would be
> needed to put the bytea value into a string literal in a SQL command.
> There's an extra level of backslashing involved to do that (because
> backslashes are special to both the string-literal syntax and the
> text input syntax for bytea).
>
> But this is really the hard way to do it considering that you are using
> PQexecParams. Just tell PQexecParams that you want this parameter to be
> binary format, and pass the *raw* binary string as the parameter.
>
> > I couldn't find any documentation on using PQExecParams
> > with binary parameters,
>
> src/test/examples/testlibpq3.c ... that example is reproduced in
> the libpq manual, as well.
>
> regards, tom lane
>
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To: pgsql-interfaces@postgresql.org
Cc: drachs@gmail.com
Subject: Re: libpq, PQExecParams and the inserting of binary data
In-Reply-To: <ae830e6c0506031104140a2b35@mail.gmail.com>
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