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283•vitaut•5h ago•19 comments

AWS: Inaccurate Estimated Billing Data – $1.7 billion

1169•nprateem•23h ago•698 comments

Thanks HN for 15 years of support and helping me find my life's work

566•nicholasjbs•16h ago•54 comments

Reviving a 15-year-old netbook with Arch Linux

https://parksb.github.io/en/article/41.html
97•parksb•3d ago•56 comments

First atmosphere found on Earth-like planet in habitable zone of distant star

https://www.bbc.com/news/articles/cy4kdd1e0ejo
449•neversaydie•18h ago•263 comments

Porting nanochat to a TPU: what carries over from PyTorch, and what breaks

https://github.com/tucan9389/nanochat-jax/discussions/1
20•tucan9389•3d ago•1 comments

The Zilog Z80 has turned 50

https://goliath32.com/blog/z80.html
220•st_goliath•13h ago•76 comments

TP-Link Kasa cameras leaked home GPS via unauthenticated UDP for 6 years

https://github.com/BadChemical/IoT-Vulnerability-Research-Public/blob/main/TP-Link_Kasa_EC71/Kasa...
119•BadChemical•11h ago•29 comments

Learning a few things about running SQLite

https://jvns.ca/blog/2026/07/17/learning-about-running-sqlite/
245•surprisetalk•15h ago•63 comments

Stenchill: 3D Printable Solder Paste Stencil Generator

https://www.stenchill.com/en/
48•radeeyate•8h ago•10 comments

I started a “dirt notebook”

https://pinewind.bearblog.dev/i-started-a-dirt-notebook/
60•herbertl•7h ago•49 comments

Kimi K3, and what we can still learn from the pelican benchmark

https://simonwillison.net/2026/Jul/16/kimi-k3/
332•droidjj•18h ago•174 comments

In-toto: A framework to secure the integrity of software supply chains

https://in-toto.io/
16•Erenay09•1d ago•0 comments

Vāgdhenu: A Sanskrit Chanting TTS System

https://prathosh.in/vagdhenu/
159•subinalex•4d ago•41 comments

Show HN: IKEA Complexity Index

https://ikea.greg.technology/
23•gregsadetsky•5h ago•13 comments

Static search trees: 40x faster than binary search (2024)

https://curiouscoding.nl/posts/static-search-tree/
115•lalitmaganti•12h ago•6 comments

An Update on Igalia's Layer Based SVG Engine in WebKit (Reducing Layer Overhead)

https://blogs.igalia.com/nzimmermann/posts/2026-07-14-lbse-conditional-layers/
43•bkardell•3d ago•2 comments

Battery packs: Let's talk about crates, baby

https://smallcultfollowing.com/babysteps/blog/2026/07/15/battery-packs/
17•MeetingsBrowser•1d ago•7 comments

DrDroid (YC W23) Is Hiring

https://www.ycombinator.com/companies/drdroid/jobs/w45QcNV-product-engineer-assignment-mandatory
1•TheBengaluruGuy•7h ago

Lego building instructions through time

https://www.lego.com/en-us/history/articles/d-lego-building-instructions-through-time
119•NaOH•14h ago•27 comments

Shipping OpenStrike: A Counter-Strike-Shaped FPS on a 2004 Handheld

https://pocketjs.dev/blog/shipping-openstrike/
43•itvision•6d ago•13 comments

The Isomorphic Labs Drug Design Engine unlocks a new frontier beyond AlphaFold

https://www.isomorphiclabs.com/articles/the-isomorphic-labs-drug-design-engine-unlocks-a-new-fron...
72•andsoitis•9h ago•7 comments

Painting the sides of railroad rails white to reduce derailment

https://www.up.com/news/safety/Tracking-Rail-Heat-260608
92•zdw•12h ago•47 comments

Open Book Touch: open-source e-reader

https://www.crowdsupply.com/oddly-specific-objects/open-book-touch
110•surprisetalk•12h ago•36 comments

The state of open source AI

https://stateofopensource.ai/
431•rellem•18h ago•310 comments

Show HN: Find someone in the dark – light them or light yourself? (Three.js)

https://github.com/skorotkiewicz/signal-in-the-dark
4•modinfo•2h ago•0 comments

Quintile – keyboard N×M grid tiling for macOS

https://github.com/stefanopineda/quintile
5•stefanopineda•5d ago•2 comments

Kaiser nurses say AI, surveillance are making their jobs and patient care worse

https://localnewsmatters.org/2026/07/15/kaiser-nurses-say-ai-workplace-surveillance-are-making-th...
497•gnabgib•10h ago•318 comments

Show HN: A zoomable timeline of 4M Wikipedia events

https://app.everything.diena.co/
91•lortex•14h ago•32 comments

Frank Lloyd Wright’s first home

https://www.architecturaldigest.com/story/frank-lloyd-wright-home-and-studio-everything-you-need-...
100•NaOH•5d ago•52 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.