Thomas Heller <info@zilence.net> writes:
> The first 16 bits (well skip the first 40) in every DataRow ('D') packet
> refer to the number of columns following. Is there any way that this number
> is different from the number received in the RowDescription ('T')?
A quick look into libpq says that it doesn't support them being different:
/* Get the field count and make sure it's what we expect */ if (pqGetInt(&tupnfields, 2, conn)) { /* We
shouldnot run out of data here, so complain */ errmsg = libpq_gettext("insufficient data in \"D\" message");
goto advance_and_error; }
if (tupnfields != nfields) { errmsg = libpq_gettext("unexpected field count in \"D\" message"); goto
advance_and_error; }
> Currently I use an assert since I assume it always is the same, however I
> only have tested with a very limited dataset so far.
An assert seems overly optimistic. libpq has an explicit test with an
error recovery path, you should too.
regards, tom lane