Where would i find good marketing material on Datomic? I’m thinking specifically about the ability to compose queries, something i can’t do in SQL.

@drewverlee are you looking for printed/pdf type stuff or videos/interviews/etc?

I’m looking for technical material, the format is less important.

https://www.youtube.com/watch?v=PTMyTyMcxkU

a customer story specifically about query composition

technical details http://docs.datomic.com/query.html#grammar

thanks!

examples of query: https://github.com/Datomic/day-of-datomic/blob/master/tutorial/query.clj and https://github.com/Datomic/day-of-datomic/blob/master/tutorial/query_tour.clj

Mike Nygard had a few important things to say about Datomic here http://blog.cognitect.com/blog/2016/4/22/the-new-normal-everything-relies-on-sharp-tools

from the original source: https://www.youtube.com/watch?v=Cym4TZwTCNU

😉

Hey folks, I’m struggling trying to remember how to do a very prosaic query that finds entities with values that are not in a given input set

@drewverlee another good customer story: https://www.youtube.com/watch?v=7lm3K8zVOdY

Hi, does anyone know offhand what one would use to determine if a transactor is ‘healthy’. We’re a Terraform shop so i’ve created a config that creates the dynamodb, transactor instnaces, etc etc. Everything works fine, but I need the ‘external’ check such that I can have the AWS infrastructure take a bad instance out of the ASG I was trying to do a TCP ping, but it looks like the standby transactor doesn’t even accept connections, perhaps smartly 😉

@donaldball might you be referring to the function missing?

as in [(missing? $ some-entitty some-attribute)]

no, I was looking for entities with values that aren’t in a given set. My problem was merely syntax: (not [(contains? ?the-set ?v)])

oh I see

To anyone who has wanted to get :db/ident values for refs from pull expressions (i.e. the behavior of d/entity for "enum" entities), consider up-voting this feature request: https://receptive.io/app/#/case/49752

indeed that would be a nice feature.