crux
clojure-graph-resources
crux | clojure-graph-resources | |
---|---|---|
16 | 6 | |
1,475 | 252 | |
- | - | |
9.7 | 1.8 | |
over 2 years ago | almost 2 years ago | |
Clojure | ||
MIT License | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
crux
- Speeding Up `Atan2f` by 50x
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Bridging the Blockchain / Database Divide (Temporal Graph Queries for Corda)
Hi, a couple of my colleagues spent some time working on this integration with our open source database product (https://opencrux.com), and I'm curious to know - has anyone done similar things to connect Corda with a secondary off-the-shelf query engine?
- Crux 1.18.0 Is Out
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Crux 1.18.0 is out!
For more details, see the release notes.
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Looking for Intermediate & Advanced SQL Users for Research
The context is that I work on on https://opencrux.com, which offers a bi-temporal Datalog query layer (as well as SQL) that more or less addresses the intersection of the two, since Datalog is great for expressing recursive queries.
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How to query Datomic, Datascript, Asami, or other graph databases
I suppose another somewhat important distinction, once again performance related, is that graph databases will typically track index statistics to aid with query planning. For example, Crux uses stored knowledge of attribute-value cardinalities (recently via HyperLogLog) to optimise the join order of a query - this can make a big difference when attempting to traverse large graphs efficiently.
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Free project to practice sql ?
Agreed, recursive querying & bitemporal modelling in SQL are non-trivial problems, and the combination of the two is harder still. For an alternative perspective on tackling such problems I'd suggest looking at Datalog, which makes recursion a breeze, and a database with first-class bitemporality - both of which feature in https://opencrux.com (which I happen to work on :))
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Ask HN: What under-the-radar technology are you super excited about?
I work on Crux so can share a few details about our implementation of Datalog. The query is compiled into a kind of Worst-Case Optimal Join algorithm [0] which means that certain types of queries (e.g. cyclic graph-analytical queries, like counting triangles) are generally more efficient than what is possible with a non-WCOJ query execution strategy. However, the potency of this approach relies on the query planner calculating a good ordering of variables for the join order, and this is a hard problem in itself.
Crux is usually very competent at selecting a sensible variable ordering but when it makes a bad choice your query will take an unnecessary performance hit. The workaround for these situations is to break your query into smaller queries (since we don't wish to support any kind of hinting). Over the longer term we will be continuing to build more intelligent heuristics that make use of advanced population statistics. For instance we are about to merge a PR that uses HyperLogLog to inform attribute selectivity: https://github.com/juxt/crux/pull/1472
[0] https://cs.stanford.edu/people/chrismre/papers/paper49.Ngo.p...
- Bitemporal History
- Git as a NoSql Database
clojure-graph-resources
- Why Is Jepsen Written in Clojure?
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Fluree DB - A datomic like database that I just discovered
You may be interested in this list: https://github.com/simongray/clojure-graph-resources
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Does anyone have experience with ALM/PLM tools (Application/Product Lifecycle Management)?
Clojure actually has excellent RDF support. Several features of Clojure and Datomic were inspired by directly by RDF and the semantic web tech is also fairly well-represented. I have compiled a list of all the relevant libraries (pull requests welcome).
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An Introduction to Knowledge Graphs
... there's a whole bunch of Datomic-likes these days:
https://github.com/simongray/clojure-graph-resources#datalog
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What are some great Clojure libraries, as of 2021?
There is a whole ecosystem around Datomic and Datomic-like databases that represent linked data in an RDF-like fashion using simple tuples.
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Why Learn Prolog in 2021?
Probably worth mentioning for those interested in Datalog that there's actually a growing selection of databases for Clojure that use Datalog as their query language. I have documented them here: https://github.com/simongray/clojure-graph-resources#datalog
The Clojure variants of Datalog (they model triples as Clojure data structures) are basically becoming as ubiquitous in Clojure as SQL is elsewhere.
What are some alternatives?
xtdb - An immutable database for application development and time-travel data compliance, with SQL and XTQL. Developed by @juxt
malli - High-performance data-driven data specification library for Clojure/Script.
asami - A graph store for Clojure and ClojureScript
specter - Clojure(Script)'s missing piece
awesome-semantic-web - A curated list of various semantic web and linked data resources.
materialize - The data warehouse for operational workloads.
awesome-prolog - Curated list of Prolog packages and resources
mergestat-lite - Query git repositories with SQL. Generate reports, perform status checks, analyze codebases. 🔍 📊
meander - Tools for transparent data transformation
mnm - mnm implements TMTP protocol. Let Internet sites message members directly, instead of unreliable, insecure email. Contributors welcome! (Server)
core.logic - A logic programming library for Clojure & ClojureScript