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iOS 27, iPadOS 27, and macOS 27

https://www.apple.com/newsroom/2026/09/major-updates-for-apples-software-platforms-are-now-availa...
559•throw0101d•13h ago•623 comments

Linux from Scratch

https://www.linuxfromscratch.org/
116•sippingabonedry•3h ago•39 comments

OpenArm: An open-source 7DOF humanoid arm

https://github.com/enactic/OpenArm
56•Lwrless•1d ago•11 comments

4,400-Year-Old Tomb of Egyptian Judge Found at Saqqara with Colors on Walls

https://arkeonews.net/4400-year-old-tomb-of-an-egyptian-judge-found-at-saqqara-with-colors-still-...
113•arunbahl•2d ago•29 comments

Pion, an agent designed to run any company autonomously

https://andonlabs.com/blog/why-we-built-pion
380•lukaspetersson•14h ago•444 comments

When code is a maze, smart developers make maps (2025)

https://medium.com/@simonsmartiom/when-code-is-a-maze-smart-developers-make-maps-fbc452a48c1b
20•boxesnlines•23h ago•25 comments

Charts built for Chat

https://dbtcharts.com/blog/charts-built-for-chat/
205•thingsilearned•10h ago•64 comments

Lingo.dev (YC F24) is hiring a senior content engineer (Remote, worldwide)

https://lingo.dev/en/careers/ff88132a-cb79-4d35-a6a0-a6230de7a013
1•maxpr•47m ago

XCancel service is suspended until further notice

https://xcancel.com/#
590•gaganyaan•21h ago•881 comments

Dropping eBPF CPU Cost by About 90% with Memoization (Not AI Gen)

https://nathannaveen.dev/posts/dropping-ebpf-cpu-cost-by-90/
95•nathannaveen•17h ago•25 comments

Show HN: Redis City – Explore how Redis works in an interactive 3D model

https://poltora.dev/redis
56•poltora•2d ago•9 comments

OpenAI bots knew about the RubyGems caching vulnerability

https://tenderlovemaking.com/2026/09/11/what-a-time-to-be-alive/
436•gregnavis•19h ago•346 comments

Distributed Systems Classics (2017)

https://nvartolomei.com/dist-sys-classics/
285•grep_it•15h ago•60 comments

A beginning for mathematics

https://www.daniellitt.com/blog/2026/9/13/a-beginning-for-mathematics/
207•robinhouston•16h ago•114 comments

Compressing a flag to 11 bits

https://read.vantezzen.io/miniflags
127•bennett_dev•2d ago•53 comments

Synthesizing Loop-Free Programs with Rust and Z3 (2020)

https://fitzgen.com/2020/01/13/synthesizing-loop-free-programs.html
8•karelpeeters•3d ago•0 comments

Show HN: Macros with a Behringer FCB1010 MIDI Pedalboard in macOS

https://github.com/JamesRyanATX/fcbnerd
58•fretlessjazz•8h ago•13 comments

Principles for Fast Tokio Applications

https://dial9-rs.github.io/blog/principles-for-fast-tokio-applications/
198•carllerche•16h ago•50 comments

Ask HN: What are you working on? (September 2026)

326•david927•1d ago•998 comments

Ubuntu 26.10 completes transition to Rust-based coreutils

https://www.omgubuntu.co.uk/2026/09/ubuntu-2610-rust-coreutils-complete
155•theanonymousone•18h ago•156 comments

People who can't picture anything are rewriting the science of imagination

https://dailyneuron.com/aphantasia-mental-imagery-brain-network/
153•giuliomagnifico•18h ago•220 comments

Steam Frame starts at $1059

https://store.steampowered.com/hardware/steamframe
638•bsimpson•14h ago•477 comments

Cloudflare AKE cuts origin HelloRetryRequests from 52% to 3.7%

https://blog.cloudflare.com/automatic-key-exchange-for-origins/
106•iamsyr•14h ago•30 comments

Backprop Alternative: Augmented Lagrangian Predictive Coding

https://pub.sakana.ai/pc-alm/
83•guld•13h ago•25 comments

How my e-reader lost its stripes

https://www.serpentine.com/posts/2026/x3-stripes/
193•simonmic•15h ago•35 comments

Optimizing a Spin-Lock

https://david.alvarezrosa.com/posts/optimizing-a-spin-lock/
61•signa11•2d ago•29 comments

Dario, Please

https://pop.rdi.sh/dario-please/
477•0x5FC3•16h ago•231 comments

Ex-FTC boss Khan: break out the handcuffs for AI CEOs, citing 1934 precedent

https://www.theregister.com/ai-and-ml/2026/09/14/ex-ftc-boss-khan-urges-uncle-sam-to-break-out-th...
153•throwworhtthrow•7h ago•81 comments

Why don't machine learning research agents overfit?

https://www.amazon.science/blog/why-dont-machine-learning-research-agents-overfit
124•Betelbuddy•15h ago•68 comments

The biggest dinosaurs couldn't sit on their eggs

https://www.cbc.ca/news/science/titanosaur-eggs-9.7336841
36•BiraIgnacio•1d ago•14 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.