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Btree

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Choosing UUIDv7 for Primary Keys in PostgreSQL 18

PostgreSQL 18 includes uuidv7() for generating time-ordered UUIDs. This article explains how UUIDv7 changes B-tree behavior compared with UUIDv4, the tradeoff of exposing time information, and a measured path for adopting it in existing tables.

Database Postgresql

2026-08-27