crux

General purpose bitemporal database for SQL, Datalog & graph queries. Backed by @juxt [Moved to: https://github.com/xtdb/xtdb] (by juxt)

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NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a better crux alternative or higher similarity.

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crux reviews and mentions

Posts with mentions or reviews of crux. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-08-17.
  • Speeding Up `Atan2f` by 50x
    7 projects | news.ycombinator.com | 17 Aug 2021
  • Bridging the Blockchain / Database Divide (Temporal Graph Queries for Corda)
    1 project | /r/corda | 2 Aug 2021
    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
    1 project | news.ycombinator.com | 30 Jul 2021
  • Crux 1.18.0 is out!
    1 project | /r/Clojure | 30 Jul 2021
    For more details, see the release notes.
  • Looking for Intermediate & Advanced SQL Users for Research
    1 project | /r/SQL | 15 Jun 2021
    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.
  • How to query Datomic, Datascript, Asami, or other graph databases
    4 projects | /r/Clojure | 4 Jun 2021
    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.
  • Free project to practice sql ?
    1 project | /r/SQL | 16 May 2021
    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 :))
  • Ask HN: What under-the-radar technology are you super excited about?
    14 projects | news.ycombinator.com | 12 Apr 2021
    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
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Stats

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16
1,475
9.7
over 3 years ago

juxt/crux is an open source project licensed under MIT License which is an OSI approved license.

The primary programming language of crux is Clojure.


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