Re: [GENERAL] detecting NULL from libpq... - Mailing list pgsql-general

>
> 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);


--
Bruce Momjian                          |  830 Blythe Avenue
maillist@candle.pha.pa.us              |  Drexel Hill, Pennsylvania 19026
  +  If your life is a hard drive,     |  (610) 353-9879(w)
  +  Christ can be your backup.        |  (610) 853-3000(h)