[Monetdb-developers] Single column select vs aggregation
Stefan de Konink
stefan at konink.de
Thu Feb 18 19:54:28 CET 2010
Op 18-02-10 19:44, Stefan Manegold schreef:
> because it is built on an intermediate result (base BAT plus delta BATs
> applied) that is gone, again after the query has been executed.
I really feel I have learnt something now :) thanks :)
Given this information, is there a way to get the cost function to be
optimised? Either by taking reuse in account, or otherwise by the
modifying the size?
(Or more futuristic, storing the choice and the performance.)
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