>
> Hi. I'm wondering if it's possible to tell whether a field returned
> by PQgetvalue() is NULL? Can one distinguish between a varchar field
> that contains a string of zero length and a varchar field that is
> NULL? (And if so, how? :-)
From man libpq:
PQgetisnull returns the NULL status of a field.
int PQgetisnull(PGresult *res,
int tup_num,
int field_num);
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