prolog
logica
prolog | logica | |
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14 | 19 | |
539 | 1,682 | |
- | - | |
5.6 | 9.1 | |
3 months ago | 17 days ago | |
Go | Jupyter Notebook | |
MIT License | Apache License 2.0 |
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prolog
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Mangle, a programming language for deductive database programming
Other resources for logic programming and Go:
ichiban/prolog - ISO Prolog interpreter in pure Go, getting close to v1: https://github.com/ichiban/prolog
trealla-prolog/go - ISO Prolog interpreter embedded via WASM: https://github.com/trealla-prolog/go
guregu/pengine - library for interfacing with Pengines (SWI-Prolog's RPC protocol): https://github.com/guregu/pengine
biscuit-auth/biscuit-go - Biscuits are a fancy auth token with a little Datalog engine: https://github.com/biscuit-auth/biscuit-go
I'm a big fan of logic programming. We've been seeing a small resurgence of interest in it (for example Yarn using Prolog made some waves) and I have some optimism for its future.
- Golog library/language?
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State machines and reconciliation loops
fully native Prolog, or embedded? I am very familiar with Go, so I was intrigued to see ichiban/prolog. This might enable me to leverage some existing libraries (GitHub, git, etc) and save Prolog for the logic that drives them.
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Let's philosophize a bit :-)
You may also be interested in this Prolog interpreter in Go: https://github.com/ichiban/prolog
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Interpreters built in Go
There have been several Prolog interpreters written in Golang. This one appears to be most active: https://github.com/ichiban/prolog .
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The Power of Prolog
For Go, you have prolog as a scripting engine https://github.com/ichiban/prolog
- Prolog runtime for aws lambda?
- Prolog Go Library
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Hacker News top posts: Jan 27, 2022
An embeddable Prolog scripting language for Go\ (2 comments)
- An embeddable Prolog scripting language for Go
logica
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Prolog language for PostgreSQL proof of concept
If you're interested in this I would also recommend you check out Logica[0], which is a datalog-like language that is explicitly made to compile to SQL queries.
0: https://logica.dev/
- Logica
- New welcome page for Logica language
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Introduction to Datalog
> I guess the intention is to be better than SQL but then I was left with "under which circumstances?"
Excellent question.
Two of the most common use cases for databases are "transactional processing" (manipulating small numbers of rows in real time) and "analytical processing" (querying enormous numbers of rows, typically in a read-only fashion).
SQL is generally fine for transactional workloads.
But analytical queries sometimes involve multi-page queries, with lots of JOINs and CTEs. And these queries are often automatically generated.
And once you start writing actual multi-page "programs" in SQL, you may decide that it's a fairly clunky and miserable programming language. What Datalog typically buys you is a way to cleanly decompose large queries into "subroutines." And it offers a simpler syntax for many kinds of complex JOINs.
Unfortunately, there isn't really a standard dialect of Datalog, or even a particular dialect with mainstream traction. So choosing Datalog is a bit of a tradeoff: does it buy you enough, for your use case, that it's worth being a bit outside the mainstream? Maybe! But I'd love to see something like Logica gain more traction: https://logica.dev/
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Mangle, a programming language for deductive database programming
Interesting; a Google engineer previously published a Datalog variant for BigQuery: https://logica.dev/
This new language seems similar to differential-Datalog (which is sadly in maintenance mode): https://news.ycombinator.com/item?id=33521561
- Show HN: PRQL 0.2 – Releasing a better SQL
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Show HN: PRQL – A Proposal for a Better SQL
Looks pretty cool. I'd be interested if the README had a comparison with Google's Logica (https://github.com/EvgSkv/logica)
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PathQuery, Google's Graph Query Language
Oh wow that is neat!
And yes, this kind of thing is why datalog is a lot more amenable to fast query plans & runtimes than prolog. This part is especially cool: https://github.com/EvgSkv/logica/blob/main/compiler/dialects...
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Thought about Logica: Google new programming language that compiles to SQL ?
Google new programming Language that compiles to SQL (Support BigQuery and Postgres) feels very exciting. Blog: https://opensource.googleblog.com/2021/04/logica-organizing-your-data-queries.html Github: https://github.com/EvgSkv/logica
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Google Logica Aims To Make SQL Queries More Reusable and Readable
Going to be? It already is. In fact, one thing the article misses is right there at the bottom of the project page:
What are some alternatives?
go-python - naive go bindings to the CPython2 C-API
scryer-prolog - A modern Prolog implementation written mostly in Rust.
go-lua - A Lua VM in Go
ungoogled-chromium-archlinux - Arch Linux packaging for ungoogled-chromium
OPA (Open Policy Agent) - Open Policy Agent (OPA) is an open source, general-purpose policy engine.
malloy - Malloy is an experimental language for describing data relationships and transformations.
gval - Expression evaluation in golang
prql - PRQL is a modern language for transforming data — a simple, powerful, pipelined SQL replacement
otto - A JavaScript interpreter in Go (golang)
dbt-core - dbt enables data analysts and engineers to transform their data using the same practices that software engineers use to build applications.
differential-datalog - DDlog is a programming language for incremental computation. It is well suited for writing programs that continuously update their output in response to input changes. A DDlog programmer does not write incremental algorithms; instead they specify the desired input-output mapping in a declarative manner.