"Stephen R. van den Berg" <srb@cuci.nl> writes:
> Robert Haas wrote:
>> and break on-disk compatibility just to make it easier to
> If it's inserted in the "special" area, it will not break any
> compatibility.
I'll tell you what I really don't like about this proposal: we discuss
some scheme or other for taking over the "special space" in heap pages
at least once a year. None of them have been particularly compelling
so far, but one may come along that is; especially given that we're now
trying to maintain on-disk compatibility across versions. So I think
the opportunity cost of assigning a use to that space is mighty high.
I don't find this idea important enough to justify foreclosing future
uses for the special space.
The real bottom line is this: if you care enough about your data to
be willing to expend a large amount of effort on manual recovery
attempts, why didn't you have a decent backup scheme in place?
There are way too many scenarios where you'll have no hope of doing
any such manual recovery anyway.
regards, tom lane