I don't see it documented, but it appears that you can only use the d/tx-range to map over 1000 datoms at a time? Is this correct? Requesting on a datomic cloud database with about 4 million datoms, where 13194139533312 is my first txid:

(count (into [] (d/tx-range (conn) {:start 13194139533312 :end nil}))) ;; => 1000

Also, this behavior applies to ts

(count (into [] (d/tx-range (conn) {:start 0 :end 4000}))) ;; => 1000

I noticed that my datomic tx count was growing faster than I expected, after inspecting the tx log, there appears to be random no-op transactions a few times per second:

[#datom[13194144633312 50 #inst "2020-04-22T23:19:36.303-00:00" 13194144633312 true]]
[#datom[13194144633313 50 #inst "2020-04-22T23:19:36.549-00:00" 13194144633313 true]]
[#datom[13194144633314 50 #inst "2020-04-22T23:19:36.771-00:00" 13194144633314 true]]
[#datom[13194144633315 50 #inst "2020-04-22T23:19:37.336-00:00" 13194144633315 true]]
[#datom[13194144633316 50 #inst "2020-04-22T23:19:38.186-00:00" 13194144633316 true]]
[#datom[13194144633317 50 #inst "2020-04-22T23:19:38.919-00:00" 13194144633317 true]]
[#datom[13194144633318 50 #inst "2020-04-22T23:19:39.696-00:00" 13194144633318 true]]
[#datom[13194144633319 50 #inst "2020-04-22T23:19:40.024-00:00" 13194144633319 true]]

Working adding some monitoring for the issue above ^ but all the (cast/dev) calls break with an error like this, was only able to find one older slack message in the archive, but there was no resolution for the issue. Any hints?

> (cast/dev {:msg "Test"})
No implementation of method: :-dev of protocol: #'datomic.ion.cast.impl/Cast found for class: nil

cast/dev does not cast in production https://docs.datomic.com/cloud/ions/ions-monitoring.html#dev You’d need to redirect cast/dev before calling it

https://docs.datomic.com/cloud/ions/ions-monitoring.html#local-workflow

if you’re running in an active ion, use cast/event instead

Got it. Will cast/dev break in a REPL? Both cast/dev + cast/event break with a similar error locally in a REPL. Want to make sure it won't break my production ion.

> (cast/event {:msg "CodeDeployEvent"})
No implementation of method: :-event of protocol: #'datomic.ion.cast.impl/Cast found for class: nil

something else is going on there do you have datomic.ion.cast in your require and also check versions you’re using

This is my setup, checking out latest versions

;; versions
com.datomic/ion {:mvn/version "0.9.35"}
com.datomic/client-cloud {:mvn/version "0.8.81"} 

;; ns 
(ns my.util
  (:require [datomic.client.api :as d]
            [datomic.ion :as ion]
            [datomic.ion.cast :as cast]))

(defn transact [& args]
  (cast/event {:msg "CodeDeployEvent"})

  (apply d/transact args))

These appear to be latest versions in ion starter

Weird, isolated deps and loaded just this namespace and still having the same problem

Okay, so I guess event/cast just doesn't work locally at all? I just cloned ion starter and same error.

I guess I have to throw up a test endpoint to see if it works in ions

In case anyone else runs into this, cast/event does not appear to work locally, though perhaps that can be fixed with https://docs.datomic.com/cloud/ions/ions-monitoring.html#local-workflow. When deploying to ions, it is able report to cloud watch correctly.

Yes, calling (cast/initialize-redirect :stdout) fixes the issue locally.

Why does the groupping happens differently in my :2 & :3 examples?

(let [names [[1 "Jane"] [2 "JaNe"] [3 "JANE"]
               [4 "paul"] [5 "Paul"]
               [6 "EVE"]
               [7 "bo"]]
        q #(->> (d/q % names)
                (sort-by (comp count second)))]

    (pp/pprint
      {:1
       (->> names
            (group-by (comp str/upper-case second))
            (vals)
            (map set)
            (sort-by count)
            #_(filter (comp pos? dec count)))

       :2
       (q '[:find ?upcase-name (distinct ?id+name)
            :in [?id+name ...]
            :where
            [(untuple ?id+name) [?id ?name]]
            [(clojure.string/upper-case ?name) ?upcase-name]])

       :3
       (q '[:find (distinct ?id+name)
            :with ?upcase-name
            :in [?id+name ...]
            :where
            [(untuple ?id+name) [?id ?name]]
            [(clojure.string/upper-case ?name) ?upcase-name]])}))

{:1
 (#{[6 "EVE"]}
  #{[7 "bo"]}
  #{[5 "Paul"] [4 "paul"]}
  #{[1 "Jane"] [2 "JaNe"] [3 "JANE"]}),
 :2
 (["BO" #{[7 "bo"]}]
  ["EVE" #{[6 "EVE"]}]
  ["PAUL" #{[5 "Paul"] [4 "paul"]}]
  ["JANE" #{[1 "Jane"] [2 "JaNe"] [3 "JANE"]}]),
 :3
 ([#{[6 "EVE"] [1 "Jane"] [5 "Paul"] [2 "JaNe"] [3 "JANE"] [4 "paul"]
     [7 "bo"]}])}

(q '[:find (distinct ?id+name) :with ?upcase-name ...

(q '[:find (distinct ?id+name) ?upcase-name ...

So I'm trying to automate deployments with Amazon Codebuild, and having a working deploy script (it runs fine on my local machine). However, when it runs on the codebuild server I get the following error: Error building classpath. Could not find artifact com.datomic:ion:jar:0.9.35 in central () . I can download the exact zip used by codebuild and run the script fine on my local machine. Why would clojure-cli not know to look for the ion jar in datomic's repo?

It probably is - the error just reports the last place it looked

I think this is actually maybe a known issue with code build though

Where code build can’t see stuff in a different region or different vpn or something