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Posts on tips and tricks, using and learning about PostgreSQL for database development and analysis.

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Why AI-Generated Migrations Need a Different Gate Than Code Patches

Why AI-Generated Migrations Need a Different Gate Than Code Patches

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4 min read
I built a Supabase RLS audit that's just SQL wrapped in a prompt

I built a Supabase RLS audit that's just SQL wrapped in a prompt

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4 min read
We found a bug that let our test suite write to production. Here's what we did about it.

We found a bug that let our test suite write to production. Here's what we did about it.

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2 min read
The Data Structure Behind Every Database Index: B+ Trees

The Data Structure Behind Every Database Index: B+ Trees

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5 min read
I Finally Got pgAdmin 4 Working in FlyEnv on Windows — Here’s What Actually Went Wrong

I Finally Got pgAdmin 4 Working in FlyEnv on Windows — Here’s What Actually Went Wrong

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2 min read
Composite Indexes Explained: Why Column Order Is the Whole Game

Composite Indexes Explained: Why Column Order Is the Whole Game

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4 min read
Your Index Only Scan Is Lying: Covering Indexes and the Visibility Map

Your Index Only Scan Is Lying: Covering Indexes and the Visibility Map

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4 min read
PostgreSQL Internals: What Happens When You Run SELECT *

PostgreSQL Internals: What Happens When You Run SELECT *

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2 min read
Why I Chose PDF RAG Chunking and Metadata for Catalog Semantic Search

Why I Chose PDF RAG Chunking and Metadata for Catalog Semantic Search

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6 min read
Your AI agent writes migrations that look safe. Here's what they actually do to Postgres.

Your AI agent writes migrations that look safe. Here's what they actually do to Postgres.

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5 min read
Six ways I leaked data through correct RLS policies

Six ways I leaked data through correct RLS policies

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6 min read
Benchmarkée el ORM Postgres nativo de mi lenguaje contra SQLAlchemy: ~8 más rápido en reads, 5.7 menos memoria — y dónde empata

Benchmarkée el ORM Postgres nativo de mi lenguaje contra SQLAlchemy: ~8 más rápido en reads, 5.7 menos memoria — y dónde empata

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6 min read
The Billion-Row Table: Database Partitioning in Laravel 🗄️

The Billion-Row Table: Database Partitioning in Laravel 🗄️

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4 min read
How We Reset Monthly Quotas Without Race Conditions or Cron Drift

How We Reset Monthly Quotas Without Race Conditions or Cron Drift

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5 min read
Test your Supabase RLS before you ship: a free red/green fixture and the 9 SQL checks a linter cannot run

Test your Supabase RLS before you ship: a free red/green fixture and the 9 SQL checks a linter cannot run

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4 min read
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