I implemented a few lazy sort & merge functions that are used heavily in my ReBAC authorization library, EACL, to lazily "merge" & deduplicate ~1M datoms emitted from Datomic's d/...

I'm studying Datomic and I got stuck in Multiple Head Rules. In Datomic Documentation, it's said that a Multiple Head Rule is a rule that has multiple "heads" and each head has a different ...

I'm working with Datomic and need to process a large result set from a query. I want to make the processing lazy to handle the large output efficiently. Here's my current approach: (let [normalized-...

I'm setting up a Datomic Ions system and encountering an error when trying to access the HTTP direct endpoint. Here's my current setup: Successfully established client and connection Completed push ...

I am using the Datomic client api com.datomic/local {:mvn/version "1.0.285"} and clojure version org.clojure/clojure {:mvn/version "1.11.1"} i am importing like this [datomic....

I have this: (defn entities [entity-map] (db/q '[:find [(pull ?e pattern) ...] :in $ pattern ?primary-field :where [?e ?primary-field]] (:pattern entity-map) (:primary entity-...

With the following data [ [:db/add #db/id[db.part/user -1] :Ns/i 0] [:db/add #db/id[db.part/user -1] :Ns/ii 1] [:db/add #db/id[db.part/user -1] :Ns/ii 2] [:db/add #db/id[db.part/user -1] :Ns/...

I am working with a fairly straightforward To-Do database. It has a hierarchical tree-like structure. Each entity is a block; every block as a children attribute for all its children, and a checked ...

I am using Datalevin 0.8.16 as a database for my application. I have inserted some data: (datalevin.core/transact! conn [{:hello "some value" :data {:k "other value"}}]) ...

Think about this problem, I have a database with people and his friends: ['Bart" :person/friend "Milhouse"] ['Bart" :person/friend "Homer"] ['Homer" :person/friend &...

I am using Datahike 0.6.1531 (not Datomic) on the JVM. I have a list of book titles to display in a web app. If the book is "notable", I do something special, like apply a background-color ...

I'm working with Datomic Cloud and I noticed the following scenario, whenever I transact a fact that is of the java.net.URI type and try to query it back I get com.cognitect.transit.impl.URIImpl back ...

(def order-info-query (->> (d/q '[:find ?si ?ia ?os ?p :where [?e :proposal/id _] [?e :proposal/supplier-id ?s] [?e :proposal/item-amount ?...

I have a situation where I have an entity A with a cardinality:many ref to an entity B. A is already transacted to the database. I'm looking for the most efficient way to add entity B and add it to ...

I'm persisting an entity to Datomic, and I can pull it back out as expected. The entity has a unique UUID field :student/id, and if I try to query with a match on that field's value, I'm not getting ...