UUIDs are often used as primary keys in databases due to their uniqueness and ease of generation. While not always the optimal choice due to size concerns, PostgreSQL offers a dedicated UUID type that is more efficient than storing UUIDs as text. Experiments show that using the `uuid` type significantly reduces table and index size compared to `text`. Furthermore, UUID v7, which generates time-sorted values, improves insert performance over the more common UUID v4. These optimizations are crucial for large datasets and high-traffic applications.
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Postgres Data Types for UUID UUID and B-Tree index How UUID v7 affects INSERT performance Further reading Summary Sort: