Peter Geoghegan <pg@bowt.ie> writes:
> It isn't actually necessary for an index AM to use the standard
> slotted page format to get the benefits that you mention, of course --
> whether or not an index AM that uses standard page headers *also* uses
> slotted pages with standard line pointers is a separate question.
Right, you don't need to use a line pointer array if you don't want
to. (IIRC, hash also opts out of that in some pages.) I took the
question to be just about the page header proper.
regards, tom lane