Charlie Paul developed a new feature for the getsentry/snuba repository, introducing a denormalized group_first_seen column to the errors table across all deployment variants. Using ClickHouse and SQL, Charlie designed and implemented this schema change to enable direct sorting of error groups by their first appearance time, which streamlines group-based analytics and reduces query latency. The work included careful database migration planning in Python, along with a rollback mechanism to ensure safe schema evolution. This targeted engineering effort improved the speed and reliability of error triage and investigation, demonstrating a thoughtful approach to database performance and operational safety.