From: | Robert Perry <rlperry(at)lodestonetechnologies(dot)com> |
---|---|
To: | pgsql-interfaces(at)postgresql(dot)org |
Subject: | Re: libpq, PQExecParams and the inserting of binary data |
Date: | 2005-06-03 18:28:14 |
Message-ID: | bf6927e82669ed8fd770de8dc1bbd3e8@lodestonetechnologies.com |
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Lists: | pgsql-interfaces |
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(at)gmail(dot)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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> broadcast)---------------------------
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