Thread: NULL feilds and ERROR messages from libpq++

I am using the libpq++ interface to interact with a table that has
some NULL fields in it. Why is it that every time I do a
PgDatabase::GetValue on a field that has a NULL value, I get an error
message printed to my console ("PQgetvalue: ERROR! tuple number 0 is
out of range 0..-1")? Is this the normal behavior? It seems very odd
that it would be, since it is common to interact with tables that
contain NULL fields.

Thank You,

Tabor Kelly

Tabor Kelly writes:

> I am using the libpq++ interface to interact with a table that has
> some NULL fields in it. Why is it that every time I do a
> PgDatabase::GetValue on a field that has a NULL value, I get an error
> message printed to my console ("PQgetvalue: ERROR! tuple number 0 is
> out of range 0..-1")? Is this the normal behavior? It seems very odd
> that it would be, since it is common to interact with tables that
> contain NULL fields.

I think you're operating on a query result that returned zero rows.

--
Peter Eisentraut   peter_e@gmx.net   http://funkturm.homeip.net/~peter