On Sun, 2010-02-07 at 17:52 -0500, Tom Lane wrote:
>
> > It would be useful to mention that the return value is volatile and
> can change across transactions or even within a transaction, just like
> ctid.
>
> Hm. I thought it was more reasonable to treat it as "stable", which
> is the normal case. You're right that there are some corner cases
> where it could change without the caller's snapshot changing, but I'm
> not sure it's worth worrying about.
OK, even if its stable I think we need to mention it because it's not
obvious that the file we keep catalog data in could change name. It's a
also a change from earlier releases where that would never happen.
--
Simon Riggs www.2ndQuadrant.com