Clojurians Log v2

in datomic cloud analytics, how do I configure username/password to the trino connector (https://trino.io/docs/current/security/password-file.html) ? the datomic documentation only talks about catalog .properties file and not the overall config.properties

Hi all! 👋 Hope everyone is doing well today. Is there anything special I need to do to get at Math/abs in a Datomic client query? I seem to remember things like this just working, but this would have been with the peer API…

[:find ?va
 :where 
 [_ :foo/long ?v]
 [(.doubleValue ?v) ?vd]
 [(Math/abs ?d) ?va]]

1. Caused by clojure.lang.ExceptionInfo
   Unable to load namespace for java.lang.Math/abs
   #:cognitect.anomalies{:category :cognitect.anomalies/not-found,
                         :message
                         "Unable to load namespace for java.lang.Math/abs"}
               require.clj:   53  datomic.core.require/anomaly!
               require.clj:   51  datomic.core.require/anomaly!
               require.clj:   67  datomic.core.require/default-resolver/fn
               require.clj:   64  datomic.core.require/default-resolver
               require.clj:   57  datomic.core.require/default-resolver
               require.clj:   79  datomic.core.require/resolve!
               require.clj:   74  datomic.core.require/resolve!
               datalog.clj: 1342  datomic.core.datalog/resolve-qualified-fn
               datalog.clj: 1336  datomic.core.datalog/resolve-qualified-fn
                 query.clj:  448  datomic.core.query/resolve-qualified-fns
                 query.clj:  445  datomic.core.query/resolve-qualified-fns
                 query.clj:  465  datomic.core.query/parse-query
                 query.clj:  452  datomic.core.query/parse-query
                 query.clj:  469  datomic.core.query/load-query
                 query.clj:  468  datomic.core.query/load-query

Try typehinting that first, it may not be able to find the right method without it.

@jcf I have a ^long and a ^double hint in my query, and I'm seeing the same exception.

paste it again with these new hints?

Can't type hint a primitive local… I thought that might be a problem.

Show me the query with the hints

'[:find (sum ?va)
  :with ?e
  :where
  [?e :transfer/amount ?v]
  [(.doubleValue ?v) ?vd]
  [(Math/abs ^double ?vd) ?va]]

I get a result when I ditch the use of Math/abs and sum the ?vd.

Can you show that query as well

'[:find (sum ?vd)
  :with ?e
  :where
  [?e :transfer/amount ?v]
  [(.doubleValue ?v) ?vd]]

That gives me back a negative double.

clj-kondo is warning me about reflection. That's a great library!

Now go for the minimal repro.

'[:find ?va
  :where
  [(ground 42.0) ?vd]
  [(Math/abs ^double ?vd) ?va]]

Same exception with your minimal repro.

1. Caused by clojure.lang.ExceptionInfo
   Unable to load namespace for Math/abs
   #:cognitect.anomalies{:category :cognitect.anomalies/not-found,
                         :message "Unable to load namespace for Math/abs"}
               require.clj:   53  datomic.core.require/anomaly!
               require.clj:   51  datomic.core.require/anomaly!

A call to Math/abs works outside of the query, which is what made me wonder if I need to whitelist the Math namespace, but I think everything in java.lang is available by default.

'[:find ?va
  :where
  [(ground 42.0) ?vd]
  [(java.lang.Math/abs ^double ?vd) ?va]]

Adding java.lang doesn't help.

Hmm.. Can you open a support case for this so I can look into it?

Where's the place to open support cases these days? http://support.datomic.com?

Yep, same as always

We've also got this handy format that prevents roundtrips https://docs.datomic.com/cloud/tech-notes/writing-a-problem-report.html

@lanejo01 want me to log an issue for this Zendesk error too? I can't create a password because of some janky iframe stuff from the looks of it.

Yes, that's weird.

Please include your browser details

and if possible a .har file network recording (or the firefox equivalent) of the network requests made.

The support email that gets sent out links to a different doc on what info to provide with support requests, and it's from 2016: https://support.cognitect.com/hc/en-us/articles/215581538-Information-to-provide-with-a-support-request

It doesn't mention providing version numbers, which is probably more helpful with a problem on top of an in-memory database. 🙂

Quick fix for the Zendesk iframe jank is to open the iframe in a new tab, and then submit the form.

I've logged the support request. Thanks, @lanejo01! 🙇

Thank you @jcf!

• Hi all. So I was going through the ion-starter tutorial, and ran into the following error at https://docs.datomic.com/cloud/ions/ions-tutorial.html#test-your-connection :

- Downloading: com/datomic/ion/0.9.50/ion-0.9.50.pom from datomic-cloud 
- Downloading: com/datomic/ion/0.9.50/ion-0.9.50.jar from datomic-cloud 
- Error building classpath. Could not find artifact com.datomic:ion:jar:0.9.50 in central (<https://repo1.maven.org/maven2/>)

the ion jars are provided in a Maven repository hosted on s3. while the bucket is public, you must have IAM creds with access to S3 to read it

FWIW, you shouldn't need S3 full access.

So my Datomic user was set up according to instructions here: https://docs.datomic.com/cloud/getting-started/configure-access.html#authorize-user Is there a reason that setup doesn’t have the necessary S3 creds baked in?

Yea, I figured I don’t need full access, but I don’t know what specifically I do need? Still confused as to why giving access to MY S3 account would affect access to a bucket outside of my account.

The issue that you haven't given your user access to read ANY S3 buckets, even public ones.

Say I were to grant universal read access via an AmazonS3ReadOnlyAccess policy:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:Get*",
                "s3:List*"
            ],
            "Resource": "*"
        }
    ]
}

You should restrict the resource arn I believe.

Tried this:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:Get*",
                "s3:List*"
            ],
            "Resource": "arn:aws:s3:::datomic-releases-1fc2183a/maven/releases/*"
        }
    ]
}

I started learning datomic/datalog today. I have following pull query that works:

(d/pull db '[*] [:block/id #uuid 0000000-0000-0000-000]) ;; based on unique

(d/pull db '[*] [:block/tags :button])

[{:db/id "block-button-id"
  :block/id (uuid-from-string "block-button-1")
  :block/tags [:button]
  :block/display "Button Block 1"
  :block/description "Button Block 1"
   :block/value 101155069755482}
  {:db/id "block-button-2"
   :block/id (uuid-from-string "block-button-2")
   :block/tags [:button]
   :block/display "Button Block 2"
   :block/description "Button Block 2"
   :block/value 101155069755483}]

Hi @pntripathi9417, I think you're looking for a query, not a pull.

(d/q '[:find (pull ?b [*])
       :where 
       [?b :block/tags :button] db)

Anything exist that's more updated than this? https://github.com/dazld/awesome-datomic