Okay, sure -- if your need is realtime Query = Function(All data) -- then your approach may be necessary. But this requirement (realtime Function(All data)) is

Okay, sure -- if your need is realtime Query = Function(All data) -- then your approach may be necessary. But this requirement (realtime Function(All data)) is a rarity, I would think. And in this rare case, perhaps, the complexity you're introducing is warranted.