Re: Error on query execution

Hi, Tom,

On Tue, Mar 4, 2025 at 8:37 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> Igor Korot <ikorot01(at)gmail(dot)com> 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.

abf_type is declared as smallnt:

queries.push_back( L"CREATE TABLE IF NOT EXISTS abcatfmt(abf_name
char(30) NOT NULL, abf_frmt char(254), abf_type smallint, abf_cntr
integer, PRIMARY KEY( abf_name ));" );

Thank you.

>
> regards, tom lane