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Pi 1.0

https://earendil.com/posts/pi-1-0/
1228•sergiotapia•13h ago•378 comments

Shimano Bicycle Museum Review

https://inrng.com/2026/10/shimano-bicycle-museum/
73•pietroppeter•3h ago•10 comments

How Singapore's government-run dating service works

https://www.singapore-samizdat.com/p/how-singapores-government-run-dating-service-firstdate-works
134•danielfoster•6h ago•77 comments

Several vulnerabilities have been discovered in the Linux kernel

https://lwn.net/Articles/1097401/
268•luispa•9h ago•194 comments

DeepSeek Harness Desktop for macOS and Windows

https://www.deepseek.com/en/harness/
211•Kuyawa•5h ago•105 comments

Clef: Open-weight decision models, and new RL fine-tuning platform

https://blog.cloudflare.com/clef-decision-models/
498•jasondavies•16h ago•174 comments

SvelteKit 3

https://svelte.dev/blog/sveltekit-3-is-here
257•sampsn•12h ago•88 comments

Pi Durable

https://earendil.com/posts/pi-durable/
358•paulsmith•13h ago•45 comments

Automatic Transmission – a data-privacy study of connected vehicles

https://automatictransmission.khoury.northeastern.edu/index.html
179•rafaelc•12h ago•158 comments

Ask HN: Who is hiring? (October 2026)

198•whoishiring•17h ago•196 comments

StreetComplete on iOS is now in public beta

https://github.com/streetcomplete/StreetComplete/issues/5421
556•Snowly•21h ago•148 comments

Git 3.0's upcoming SHA-256 default will be a costly mistake

https://blog.gitbutler.com/git-3-sha-256
352•chmaynard•15h ago•334 comments

To grieve, or not to grieve?

https://xenaproject.wordpress.com/2026/10/01/to-grieve-or-not-to-grieve/
64•stabbles•22h ago•26 comments

Using Opus 5.5 to discover a new eyewitness record of the dodo

https://resobscura.substack.com/p/using-opus-55-to-discover-a-new-eyewitness
133•benbreen•11h ago•33 comments

Frog and Toad and the Increasingly Capable Machines

https://www.frogandtoad.ai/
146•supermdguy•10h ago•32 comments

Turbo Haskell

https://comonad.com/reader/2026/turbo-haskell/
82•pjmlp•18h ago•17 comments

RIP, vector database

https://turbopuffer.com/blog/rip-vector-database
318•razin•16h ago•88 comments

CSS Bed: Classless CSS themes to use as starting points in web development

https://www.cssbed.com
103•sea-gold•11h ago•26 comments

ArXiv's Updated Rate Limit Policy

https://blog.arxiv.org/2026/10/01/updated-rate-limit-policy/
111•50kIters•12h ago•51 comments

Various Projects Find Hidden SDR Capabilities in ESP32 Microcontrollers

https://www.rtl-sdr.com/various-projects-independently-find-hidden-sdr-capabilities-in-esp32-micr...
218•nkw•17h ago•38 comments

Vote on which of Hacker News' challenges for AI have been met

https://stoppels.ch/goalposts/
137•stabbles•15h ago•140 comments

Show HN: Janus – Go binary that runs GGUF models via Vulkan on AMD/Intel/Nvidia

https://github.com/Vibra-Ingenn/Janus
72•Maverick617•12h ago•13 comments

Oxygen-deprived underwater zones may not be “dead zones” but clue to early life

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2026AV002570
95•gumby•13h ago•9 comments

Cloudflare K2: serverless event streams

https://blog.cloudflare.com/cloudflare-k2-streams/
235•elffjs•18h ago•90 comments

Context Language Models

https://arxiv.org/abs/2609.37725
142•emersonmacro•17h ago•33 comments

How to speed up the Rust compiler in September 2026

https://nnethercote.github.io/2026/09/30/how-to-speed-up-the-rust-compiler-in-september-2026.html
251•trickypr•19h ago•140 comments

Butterflies use optical illusions to dodge predators

https://www.essex.ac.uk/news/2026/09/30/butterflies-use-optical-illusions-to-dodge-predators
41•gmays•9h ago•9 comments

RacketCon Is Saturday

https://con.racket-lang.org/
140•spdegabrielle•17h ago•37 comments

Building reliable (and fast) directory sync

https://www.firezone.dev/blog/building-reliable-directory-sync
6•jamilbk•3h ago•0 comments

Ask HN: Who wants to be hired? (October 2026)

109•whoishiring•17h ago•342 comments
Open in hackernews

Anatomy of a SQL Engine

https://www.dolthub.com/blog/2025-04-25-sql-engine-anatomy/
168•ingve•1y ago

Comments

jimbokun•1y ago
Very nice write up enumerating all the stages of SQL query execution. Interesting even if you don’t care about the DoIt database specifically.
Austizzle•1y ago
Man, this title tripped me up for a minute because I pronounce it with the letters like Ess-Queue-Ell

So the "A" in "A ess-queue-ell" engine felt like it should have been an "An" until I realized it was meant to be pronounced like "sequel"

perching_aix•1y ago
Not necessarily, I see native speakers completely ignore this a lot.

Have you ever considered pronouncing it as squirrel by the way?

kreetx•1y ago
Many (most?) non-native English speakers do pronounce it as ess-queue-ell, especially in their own languages, so yes, the use of "a" instead of "an" does look off from that perspective.
SloopJon•1y ago
When I read SQL for Dummies almost thirty years ago, it made a point of distinguishing "sequel" as a historical predecessor to standard "SQL." As I recall, the author even asserted that SQL is not an acronym/initialism for structured query language. I felt funny saying sequel for the next decade or so, because I wasn't an old timer experienced with this pre-SQL technology.

Now I usually say sequel because everyone else does. That and it rolls off the tongue better than S-Q-L.

jtolmar•1y ago
I prefer "ess queue ell" these days, but the first DBA I ever worked with pronounced it "squirrel".
gopalv•1y ago
This is a great write up about a pull-style volcano SQL engine.

The IR I've used is the Calcite implementation, this looks very concept adjacent enough that it makes sense on the first read.

> tmp2/test-branch> explain plan select count() from xy join uv on x = u;

One of the helpful things we did was to build a graphviz dot export for the explains plans, which saved us days and years of work when trying to explain an optimization problem between the physical and logical layers.

My version would end up displayed as SVG like this

https://web.archive.org/web/20190724161156/http://people.apa...

But the calcite logical plans also have that dot export modes.

https://issues.apache.org/jira/browse/CALCITE-4197

th0ma5•1y ago
This is really great!!
gavinray•1y ago
Calcite also has a relatively-unknown web tool for plan visualization that lets you step through execution.

It's a method from "RuleMatchVisualizer":

https://github.com/apache/calcite/blob/36f6dddd894b8b79edeb5...

Here's a screenshot of what the webpage looks like, for anyone curious:

https://github.com/GavinRay97/GraphQLCalcite/blob/92b18a850d...

ignoreusernames•1y ago
I recommend anyone who works with databases to write a simple engine. It's a lot simpler than you may think and it's a great exercise. If using python, sqlglot (https://github.com/tobymao/sqlglot) let's you skip all the parsing and it even does some simple optimizations. From the parsed query tree it's pretty straightforward to build a logical plan and execute that. You can even use python's builtin ast module to convert sql expressions into python ones (so no need for a custom interpreter!)
Abde-Notte•1y ago
Second this - building even a simple engine gives real insight into query planning and execution. Once parsing is handled, the core ideas are a lot more approachable than they seem.
albert_e•1y ago
Sorry for slight digression.

In a larger system we are building we need a text-to-sql capability for some structured data retrieval.

Is there a way one could utilize this library (sqlglot) to build a multi-dialect sql generator -- that is not currently solved by directly relying on a LLM that is better at code generation in general?

LtdJorge•1y ago
This is a SQL to X library, though. I don’t think it’s what you need.
gavinray•1y ago
You can use an LLM to generate query-builder expressions from popular libraries in whatever language.

For example, on the JVM there is jOOQ, which allows you to write something like:

  select(field("foo"), avg("bar")).from(table("todos"))
And then it will render dialect-specific SQL. It has very advanced emulation functionality for things like JSON aggregations and working around quirks of dialects.

Alternatively, you can ask an LLM to generate a specific dialect of SQL, and then use jOOQ to parse it to an AST, and then render it as a different dialect, like:

    val parser= DSL.using(SQLDialect.POSTGRES).parser()
    val parsedQuery = parser.parseQuery(postgresQuery)
    val renderedMySQL = DSL.using(SQLDialect.MYSQL).renderInlined(parsedQuery)
    println(renderedMySQL)
Unsure if functionality like this exists in other Query Builder libraries for other languages.
KyleBrandt•1y ago
Using dolthub's go-mysql-server for Grafana's upcoming SQL expressions feature (private preview in Grafana 12, but in the OSS version with a feature toggle).

GMS lets you provide your own table and database implementations, so we use GMS to perform SQL queries against Grafana's dataframes - so users can join or manipulate different data source queires, but we don't have to insert the data into SQL to do this thanks to GMS.

genai-analyst•1y ago
another digression here... sorry... i see you're trying to diy text-to-sql—at some point you're gonna hit a bunch of hiccups. like, the model writes a query that “almost” works but joins the wrong tables, or it assumes column names that don’t exist, or it returns the wrong agg because it misread the intent. and retries won’t always save you—it’ll just confidently hallucinate again.

we’ve been through all of that at wobby.ai we ended up building a system where the data team defines guardrails and reusable query templates, so the agent doesn’t just make stuff up. it can still handle user prompts, but within a safe structure. if you want to save yourself from debugging this stuff endlessly, might be worth checking out wobby.ai.