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HackerTube: YouTube built from videos recommended by HN

https://karpathy.bearblog.dev/hacker-tube/
1327•karpathy•14h ago•374 comments

Japan's trains are great. Why is booking one so hard?

https://vinibrasil.com/japan-train/
25•vnbrs•1h ago•35 comments

An Italian farmer found some unknown seeds in his attic and planted them

https://www.smithsonianmag.com/science-nature/italian-farmer-found-unknown-seeds-attic-with-nothi...
446•ecares•11h ago•128 comments

No AI, 52 min. Build all Linux Files utils in C by Hand [video]

https://www.youtube.com/watch?v=gQRmSlcTq9c
19•surprisetalk•2d ago•6 comments

Running a bootstrapped SaaS for 20 years with my brother

https://blog.zamzar.com/2026/10/30/20-years-766-million-files-two-chameleons/
92•whyleyc•1d ago•24 comments

Brazilian Court Sanctions Lawyers for Prompt Injection in Court Filing

https://jetstream.security/insights/brazilian-court-sanctions-prompt-injection-filing/
123•doodlesdev•7h ago•52 comments

TCP Use-After-Free: CVE-2026-98432 / CVSS 9.8

https://atlasum.net/blog/cve-2026-98432-linux-ipv4-tcp-uaf
510•oger•15h ago•237 comments

The AI cost of JavaScript frameworks

https://nolanlawson.com/2026/10/28/the-ai-cost-of-javascript-frameworks/
75•luu•4h ago•41 comments

Memdoor: A team of 5 Qwen3.8-27B models beats Fable 5 on LiveCodeBench Hard

https://github.com/guregodevo/memdoor/tree/main/examples/workflows/team-solve
234•guregodevo•11h ago•113 comments

OpenIDEA: The IDE you know, rebuilt in Rust

https://github.com/l0ng-ai/openidea
8•theanonymousone•1h ago•8 comments

Leaking Secrets from Air-Gap Computers by Spelling Radio Signals from RAM (2024)

https://arxiv.org/abs/2409.02292
88•hapax_legomena•8h ago•40 comments

Zinc creep in cable spelter sockets brought down the Arecibo telescope in 2020

https://maketecheasier.com/arecibo-zinc-creep-collapse/
113•ohjeez•1d ago•27 comments

ChatGPT and Codex usage limits merging

https://help.openai.com/en/articles/20001625-understanding-chatgpt-and-codex-usage-limits
127•Zariel•12h ago•66 comments

Pilot-wave hydrodynamics (Quantum phenomena in macroscopic hydrodynamic systems)

http://thales.mit.edu/bush/index.php/4801-2/
39•peter_d_sherman•1d ago•6 comments

Altoids Project

https://uvdn7.github.io/altoids-project/
111•uvdn7•11h ago•6 comments

It's the memory latency, stupid

https://pivotlake.io/blog/its-the-memory-latency-stupid/
197•ntur1337•15h ago•60 comments

A 1580 Map Shows Why Data Visualization Is Never Neutral

https://thereader.mitpress.mit.edu/a-1580-map-shows-why-data-visualization-is-never-neutral/
43•the-mitr•1d ago•3 comments

A brief history of just-in-time: forty years of JIT work, from 1960–2000

https://dl.acm.org/doi/10.1145/857076.857077
30•gjvc•2d ago•0 comments

Understanding Email Encryption

https://www.fastmail.com/blog/email-encryption/
12•nmjenkins•1d ago•4 comments

Electrification Could Cut Global Energy Use in Half

https://fullycharged.show/podcasts/podcast-361-why-electrification-could-cut-global-energy-use-in...
112•toomuchtodo•15h ago•48 comments

Jepsen: ParticleDB 1.1.4

https://jepsen.io/analyses/particledb-1.1.4
265•aphyr•20h ago•154 comments

Surviving "The Graduate"

https://www.newyorker.com/culture/the-weekend-essay/dustin-hoffman-on-surviving-the-graduate
118•samizdis•14h ago•36 comments

Do the math: How we took over ChatGPT accounts

https://www.parameter.ai/labs/we-found-a-gap-at-openai
332•armcat•23h ago•165 comments

Edgar Allan Poe, Quintessential American Writer

https://slate.com/culture/2026/10/edgar-allan-poe-poems-stories-most-influential-american-writer-...
35•samclemens•3d ago•1 comments

Pac-Man's Siren Call

https://unsung.aresluna.org/pac-mans-siren-call/
22•tobr•3h ago•6 comments

Simple circuits can create complex behaviors

https://aatishb.com/myriad/lets-build-a-brain/
253•aatish•4d ago•78 comments

Show HN: BBRouter – Ben Eater's 8-bit computer, simulated on 3D breadboards

https://bbrouter.com/bbrouter/ben-eater-sap-1
34•creack•10h ago•8 comments

The Duty of a Scholar

https://www.daemonology.net/blog/2026-10-31-The-Duty-of-a-Scholar.html
118•gslin•15h ago•32 comments

Anthropic blocks users for anything touching training larger models

https://twitter.com/jiahaoshao1/status/2116475922190922088
356•pretext•14h ago•206 comments

Reading and writing are less symmetric than you (probably) think

https://fgiesen.wordpress.com/2015/10/25/reading-and-writing-are-less-symmetric-than-you-probably...
115•luu•4d ago•26 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.