Hi
> What we have speculated about in the past is extending EXPLAIN > so that it can be applied to ALTER TABLE and other complicated > utility commands, and then for ALTER TABLE one bit of info it would > give you is whether a table rewrite (or even a table scan) is > required. Obviously, that's a major project, and so nobody's > tackled it yet AFAIK. > I though same idea, using EXPLAIN for this purpose can be nice and intuitive Regards Pavel > > regards, tom lane >
