Datascript backed by MapDB, based on an idea by Ernestas Lisauskas.
Experimental, uses with-redefs to monkey-patch Datascript and
replace its in-memory B+ tree implementation. Not tested except for
the most trivial cases, performance unknown.
;; Taken from https://github.com/tonsky/datascript
(with-mapdb [mapdb (new-mapdb-file "test-db")]
(let [schema {:aka {:db/cardinality :db.cardinality/many}}
conn (create-mapdb-conn mapdb schema)]
(d/transact! conn [{ :db/id -1
:name "Maksim"
:age 45
:aka ["Maks Otto von Stirlitz", "Jack Ryan"] } ])
(d/q '[ :find ?n ?a
:where [?e :aka "Maks Otto von Stirlitz"]
[?e :name ?n]
[?e :age ?a] ]
@conn)))Copyright © 2016 Håkan Råberg
Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.