Tom Lane wrote:
>
> Mark Butler <[EMAIL PROTECTED]> writes:
> > Surely if we have an write exclusive table lock we can rewrite tuples
> > in place rather than creating new versions with its corresponding 2x
> > space requirement.
>
> Nyet. Consider transaction rollback.
Well, the first thing t
Mark Butler <[EMAIL PROTECTED]> writes:
> Surely if we have an write exclusive table lock we can rewrite tuples
> in place rather than creating new versions with its corresponding 2x
> space requirement.
Nyet. Consider transaction rollback.
regards, tom lane
---
Mark Butler wrote:
>
> I was looking at how hard it would be to support altering column types and it
> seems to me that it would be trivial to support changing nullability,
Yes. The problem is how to formulate 'DROP CONSTRAINT' feature.
> increasing the maximum length of the VARCHAR data type a
