datomic 2019-06-05 | Slack Archive

Is possible to overwrite datomic internal clock? on-prem

yes, but only under specific circumstances

👍 4

What is the upper limit of how many datoms datomic can handle?

there are some harder entity limits

2^40 "minted" entity ids, something like that

hey Folks, how can i achieve something like that in datomic query: [((complement contains? ?type) ?event-types)]? ?event-typesis a vector.

do you mean ((complement contains?) ?event-types ?type)?

sets are usually faster:

(not [(contains? ?legal-vals ?val)] in datomic

but you can also test each one

(not [(identity ?legal-vals) [?val ...]])

or (ground [1 2 3]) instead of identity if you have a literal of vals

sorry for taking long to answer, i need to exclude result matching with ?event-types

Thank you very much @U09R86PA4, you’ve helped me a lot with your suggestions 🙂

2019-06-05