Re: Are multiple selects of the same field allowed - Mailing list pgsql-odbc

Kristis Makris wrote:
>
> 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?

Hmm both field have the same field name "id" and the driver
couldn't distinguish them. Couldn't you change the query like
  "select id, id as id2 from WaterResourec"
?

regards,
Hiroshi Inoue