in support of postponing countAggregate

I just read...

2. Have databases enabled people to harness Moore˘s law in parallel?
This would mean that databases could scale more or less linearly to
handle both the volume of the requests coming in and even the
complexity. The answer is no. Things like ORDER BY, joins, subqueries,
and many others make it almost impossible to push the query logic down
to an arbitrary number of leaf nodes and simply sort/merge/aggregate the
results. The easier way to limit queries to avoid this would be to limit
all predicates to ones that can be computed against a single row at a
time, at least where efficiency and scale are paramount.
 -- Learning from THE WEB

and it makes me feel better that we postponed aggregates.

Of course, I would have liked to postpone sort and some others too...

Dan Connolly, W3C
D3C2 887B 0F92 6005 C541  0875 0F91 96DE 6E52 C29E

Received on Thursday, 3 November 2005 03:09:27 UTC