Thanks Heikki. To clarify, there won't be any redirect-line pointers in this implementation. That space is saved. We will have the index tuple point to the latest live tuple in the update chain. So no need for redirect-line pointers.
Gokulakannan Somasundaram wrote: >> There's also the little problem that a redirect line pointer doesn't >> have room for a cross-page link, > > i don't know, what is a re-direct line pointer.
Then you clearly don't understand at all how HOT works. Please go read src/backend/access/heap/README.HOT.