On Fri, 8 Dec 2017 15:12:42 -0500 Robert Haas <robertmh...@gmail.com> wrote:
> > Maybe a better idea is ALTER COLUMN SET COMPRESSION x1, x2, x3 ... > meaning that x1 is the default for new tuples but x2, x3, etc. are > still allowed if present. If you issue a command that only adds > things to the list, no table rewrite happens, but if you remove > anything, then it does. > I like this idea, but maybe it should be something like ALTER COLUMN SET COMPRESSION x1 [ PRESERVE x2, x3 ]? 'PRESERVE' is already used in syntax and this syntax will show better which one is current and which ones should be kept. -- ---- Regards, Ildus Kurbangaliev