Are multiple selects of the same field allowed using CRecordset::GetFieldValue() ?

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От Kristis Makris
Тема Are multiple selects of the same field allowed using CRecordset::GetFieldValue() ?
Дата
Msg-id 1014162889.1044.108.camel@leonidas
обсуждение исходный текст
Список pgsql-odbc
Hello,

I've recently begun using the v7.01.0010 ODBC driver Hiroshi made
available. I'm issuing the following SQL statement:

"SELECT id, id FROM WaterResource"

Using VC++ I'm executing the following:

++++++++++++++
while (!rsNewRecords.IsEOF())
    {
         rsNewRecords.GetFieldValue("id", vID, SQL_C_SLONG);
        rsNewRecords.GetFieldValue(strFieldName, strValue);
        [...]

        rsNewRecords.MoveNext();
    }
++++++++++++++

When execution hits the second .GetFieldValue() call with strFieldname
being = "id" I get an exception, something that did not happen using the
v7.01.0008 driver

As I understand, when .GetFieldName() is used once to retrieve the value
of a field, a subsequent call to retrieve the exact same field fails.
But in the case of selecting (and thus retrieving) a column twice,
shouldn't two calls be possible/allowed for reading that field's value
twice?

Thanks,
-Kristis



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