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

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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
Why I Chose SQLite Over Postgres

Why I Chose SQLite Over Postgres

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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
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
Serverless Killed Your Connection Pool

Serverless Killed Your Connection Pool

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6 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
Your stateless service is lying: it's the connection pool

Your stateless service is lying: it's the connection pool

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4 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
Eight ways a Lovable + Supabase app leaks its users' data — and how to check yours in ten minutes

Eight ways a Lovable + Supabase app leaks its users' data — and how to check yours in ten minutes

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8 min read
Add AI search to existing application

Add AI search to existing application

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12 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
What a Large-Vehicle Router Cannot Know

What a Large-Vehicle Router Cannot Know

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3 min read
One CAST made a view 13x slower in PostgreSQL. So I benchmarked MySQL 8.4 against PostgreSQL 17

One CAST made a view 13x slower in PostgreSQL. So I benchmarked MySQL 8.4 against PostgreSQL 17

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6 min read
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