alt Hacker NewsMaybe I'm too inexperienced in this field but reading the mechanism I think this would be an obvious optimisation. Is it not?
But credit where it is due, obviously clickhouse is an industry leader.
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ryanworl • yesterday at 7:11 PM
This is a well-known class of optimization and the literature term is “late materialization”. It is a large set of strategies including this one. Late materialization is about as old as column stores themselves.
Obvious solutions are often hard to do right. I bet the code that was needed to pull this off is either very complex or took a long time to write (and test). Or both.