Simon Willison 3/9/2026

Production query plans without production data

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The article details new PostgreSQL 18 functions, pg_restore_relation_stats() and pg_restore_attribute_stats(), which enable copying database statistics from production to development. This allows developers to accurately simulate production query plans without needing the full production dataset. It also notes SQLite's existing capability via writable statistics tables, facilitating query plan testing and debugging with minimal data transfer.

Production query plans without production data

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