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Filter materialized #384

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darkleaf
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Would you like to accept this PR?
It's just a draft, if you are ok with it, I'll improve it.

Can you suggest a better implementation?

Also, I use transient, I think I should disable it due to #373.

@@ -223,6 +223,9 @@
(FilteredDB. db #(pred db %) (atom 0))))


(def filter-materialized #'db/filter-materialized)
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TODO: doc

@@ -0,0 +1,120 @@
(ns datascript.test.filter-materialized
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TODO: remove unnecessary checks

@tonsky
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tonsky commented Jan 26, 2021

Transients are fine, as long as you don’t reuse older values of them. The problem was in the logic in transact-tx-data, not in the transients themselves.

Is this somewhat more efficient than (d/init-db (filter pred (d/datoms db :eavt)))?

@darkleaf darkleaf closed this Jan 28, 2021
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2 participants