Alvaro Herrera wrote: > On Sat, Jun 28, 2003 at 01:43:32PM -0400, Tom Lane wrote: > > Bruce Momjian <[EMAIL PROTECTED]> writes: > > > Is this a TODO? > > > When columns can be reordered, move varlena columns to the end? > > > > I believe that really what you want is fixed-width NOT NULL columns > > first, then fixed-width nullable, then var-width. This ordering will > > improve the odds of actually being able to use the fixed offset for > > a particular column. > > This means that when you do ALTER TABLE ... SET/DROP NOT NULL the table > may have to be completely rewritten? Altering the physical order is > sure to provoke a rewrite, but I think people will expect a change in > constraints to be a fast operation.
I don't think we would change any physical ordering with ALTER TABLE --- just do it when the table is created, if possible. -- Bruce Momjian | http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073 ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
