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From: Igor Korot <[email protected]>
To: Tom Lane <[email protected]>
To: pgsql-generallists.postgresql.org <[email protected]>
Subject: Re: Error on query execution
Date: Thu, 6 Mar 2025 15:54:41 -0600
Message-ID: <CA+FnnTwCMDVA4VHSsjv3OpFrrnjpyAhiMZyW0mu0X=fVmsfUpA@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <CA+FnnTwkJtLq0AvY6UB7dUrdXsO28PGSqX-wBOy+LT6Ei1jD4A@mail.gmail.com>
	<[email protected]>

H,

On Tue, Mar 4, 2025 at 8:37 PM Tom Lane <[email protected]> wrote:
>
> Igor Korot <[email protected]> writes:
> >     binaryIntVal = htonl( (uint32_t) type );
> >     paramValues[0] = (char *) &binaryIntVal;
> >     paramLengths[0] = sizeof( binaryIntVal );
> >     paramFormats[0] = 1;
>
> You're apparently trying to pass this parameter as an int4 ...
>
> >     res = PQexecParams( m_db, "SELECT * FROM abcatfmt WHERE abf_type =
> > $1", 1, nullptr, paramValues, paramLengths, paramFormats, 1 );
>
> ... but given that you didn't specify any data type, I think the
> parser will fall back to assuming that $1 is the same type as
> "abf_type", whatever that is.  Passing data in binary is not at all
> forgiving about getting the data type right.

Changing the line above to read:

    res = PQexecParams( m_db, "SELECT * FROM abcatfmt WHERE abf_type =
$1::smallint", 1, nullptr, paramValues, paramLengths, paramFormats, 1
);


results in:

$1 = L"ERROR:  incorrect binary data format in bind parameter 1\n"

I am now at a complete loss.

How do I fix the code so it will run?

Thank you.

>
>                         regards, tom lane

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