Re: libpq, PQExecParams and the inserting of binary data

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
>