[HACKERS] SQLSTATE of notice PGresult

[Dmitriy Igrishin]

Hey all,

Accordingly to the documentation of libpq, SQLSTATE code field "is not
localizable, and
is always present.". But it seems, in some cases it isn't. E.g.

  /* the main code */
  PGresult* res = Pg::PQexec(conn, "select 1");
  Oid id = PQparamtype(res, 1);

  /* the notice receiver */
  void myNoticeReceiver(void *arg, const PGresult *res)
{
  /* Presents - "NOTICE" */
  const char* severity = Pg::PQresultErrorField(res, PG_DIAG_SEVERITY);

  /* NOT presents - NULL. Why not "00000" ? */
  const char* sqlstate = Pg::PQresultErrorField(res, PG_DIAG_SQLSTATE);

  /* Presents - "parameter number 1 is out of range 0..-1" */
  const char* primary = Pg::PQresultErrorField(res,
PG_DIAG_MESSAGE_PRIMARY);
}

So, SQLSTATE field is not always presents.

Regards,
Dmitriy