Blog

How to Evaluate Claude Skill Output Quality for Prompt-to-SQL Scenarios

We built a Claude Code Skill that generates geospatial SQL for BigQuery. It kept producing correct-looking queries with wrong results. Here's how we built evals that catch these failures.

by Vladi ‐ 5 min read

CARTO Review: What 14 Data Teams Actually Think

8 negative, 3 mixed, 3 positive. I reached out to 89 CARTO users on LinkedIn and got honest feedback from 14 of them.

by Vladi ‐ 4 min read

Why We Stopped using OpenStreetMap and switched to Overture Maps on BigQuery and Snowflake

The OSM BigQuery Dataset is two years stale. Query fresh Overture Maps in BigQuery and Snowflake with copy-paste SQL.

by Vladi ‐ 3 min read

Compare and optimize BigQuery and Snowflake performance on GIS queries. Part 2.

Geometry-in-Polygon Query with dynamic geometry.

by Vladi ‐ 5 min read

Compare BigQuery and Snowflake performance on GIS queries.

Geometry-in-Polygon Query.

by Vladi ‐ 2 min read

ST_ Prefix in SQL: A Tale of Time, Space, and Standardization

What exactly ST_ means in SQL?

by Vladi ‐ 2 min read

Admin Boundaries in BigQuery Public Datasets

Fetch Countries, States, Zip codes and City Districts Geography from BigQuery Public Datasets

by Vladi ‐ 6 min read

Kepler.gl + DuckDB (WASM): configuration and custom SQL UI

by Vladi ‐ 4 min read