On 1 June 2013 19:25, Heikki Linnakangas <hlinnakangas@vmware.com> wrote:
> Hmm, it would probably be much easier to squeeze, say, one byte from the
> tuple header, than full four bytes. Then you could store store a null bitmap
> for upto 16 columns, without crossing the 24 byte mark. That would already
> get you much of the benefit.
It seemed worth recording the idea, though I agree that now its
recorded its not the best idea for reducing table size.
--Simon Riggs http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services