Martijn van Oosterhout wrote:
On Fri, Sep 29, 2006 at 09:35:31AM +0100, Heikki Linnakangas wrote:
We could get rid of t_hoff, because we should always be able to
calculate the header size. Then we're down to 18 bytes.

Without t_hoff, how do you know the size of the null bitmap? You could
probably do it only if you assume the null bitmap, if present, always
covers all the columns...

I think we assume that already. heap_form_tuple reserves space for the bitmap like this:

   if (hasnull)
       len += BITMAPLEN(numberOfAttributes);

Heikki Linnakangas

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