Re: libpq, PQExecParams and the inserting of binary data

It would be great if someone could take  the time to write this up and
include it in the manual, I have to do about a million extraniouse
text conversions, small string allocations and deallocations because I
couldn't find any docs.

David

On 6/3/05, Robert Perry <rlperry@lodestonetechnologies.com> wrote:
>         While on the subject might I ask where I could find some documentation
> of the raw binary format for other types such a Date and Decimal(,)?
>
> Thanks
> Robert Perry
>
>
> On Jun 3, 2005, at 1:48 PM, Tom Lane 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
> >
> > ---------------------------(end of
> > broadcast)---------------------------
> > TIP 8: explain analyze is your friend
> >
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: the planner will ignore your desire to choose an index scan if your
>       joining column's datatypes do not match
>