February 11, 2026 Compatibility, Protocol Changes, and Virtual Generated Columns in Rails 8.1 At Kaigi on Rails 2025, Rails Committer Yasuo Honda delivered a deep technical walkthrough titled: Rails meets PostgreSQL 18 PostgreSQL 18 was officially released on September 25, 2025, and the talk explains how Rails adapts — not just at the marketing level,…

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PostgreSQL 18 introduces protocol 3.2 with extended cancel keys, removes UNLOGGED partitioned tables, and adds virtual generated columns. Rails 8.1 adapts through defensive adapter patches, requires pg gem ≥1.6 for compatibility, and adds support for virtual generated columns with `stored: false`. The pg_stat_statements extension receives improvements for better query profiling. Rails maintains forward compatibility through runtime capability detection rather than version ceilings, demonstrating mature ecosystem collaboration between PostgreSQL core, the pg gem, and Rails adapters.

Rails Meets PostgreSQL 18

1. Version Compatibility: Rails’ Philosophy