PFC <[EMAIL PROTECTED]> writes: > What do you think ? Sounds enormously complicated and of very doubtful net win --- you're moving a lot of overhead into SELECT in order to make UPDATE cheaper, and on top of that the restriction to same-page will limit the usefulness quite a lot (unless we deliberately keep pages less than full, which costs a lot in distributed extra I/O).
Basically this is an extension of the notion of update tuple chains. Anyone who's been around the project awhile will know that we've had an unreasonably large number of corner-case bugs associated with tuple chains (particularly in VACUUM FULL), so adding a second level of complexity to 'em doesn't sound very appealing to me. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster