Re: Frequent Update Project: Design Overview of HOT Updates

"Pavan Deolasee" <pavan.deolasee@gmail.com> writes:

> Yes. The last bit in the t_infomask is used up to mark presence of overflow
> tuple header. But I believe there are few more bits that can be reused.
> There are three bits available in the t_ctid field as well (since ip_posid
> needs maximum 13 bits).

No, you cannot have those bits --- BLCKSZ is not limited to 8K, and even
if it were, we will not hold still for sticking flag bits into an
unrelated datatype.