On 6/23/2006 3:10 PM, Mark Woodward wrote:

This is NOT an "in-place" update. The whole MVCC strategy of keeping old
versions around doesn't change. The only thing that does change is one
level of indirection. Rather than keep references to all versions of all
rows in indexes, keep only a reference to the first or "key" row of each
row, and have the first version of a row form the head of a linked list to
subsequent versions of each row. The list will be in decending order.

Where exactly do you intend to keep all those links (for a table with N indexes)?


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