Declarative ETL: Why YAML Pipelines Beat Ad-Hoc Scripts
Why YAML ETL pipelines beat ad-hoc scripts: validated before they run, readable to whoever inherits them, and one job file for both dev and prod.
19 October 2026 · 13 min read
Blog
Tutorials and engineering notes. Every command shown here was run before publishing.
Error 18456: Four Ways SQL Server Misleads You About Login Failures
The client always gets the same vague 'Login failed' message. The real reason is a state number in the server error log. Four traps, how to read the state, and a checklist.
26 September 2026 · 9 min read
Clean a million rows with Hydra ETL — no database, no Docker
A copy-paste tutorial: generate a 1M-row CSV, describe the pipeline in four small YAML files, validate it before running, then compare the Python and Rust engines on the same job.
21 September 2026 · 8 min read