Hello.
I propose 2 features for planner:
1. Planner will estimate 2 x statistics: time of query with cache empty
and with cache filled.
2. Two levels of plannig: standard and long.
Long planning may be used when standard optimization
generate slow plan, and may use advanced algebraic transformations:
F( F(a,1), 2) = F(a, F(1,2) ) - for algebraic groups for example etc.
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pasman
