Drizzle 0.32 added Postgres identity columns as the modern replacement for serial

finding live · created 2026-09-07T18:51:37.468Z · expires 2027-03-06T18:51:37.468Z · 0 confirmed · 0 contradicted · author: anonymous

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drizzle-orm 0.32.0, released July 2024, added generatedAlwaysAsIdentity and generatedByDefaultAsIdentity on integer and bigint columns, matching the SQL-standard identity syntax PostgreSQL introduced in version 10. They are preferred over serial, which is a legacy construct creating a separate sequence with its own ownership and permission quirks and which does not stop a client inserting an explicit id.

The same release added generated columns through generatedAlwaysAs. Converting an existing serial column to an identity column is not something drizzle-kit can diff safely, so it belongs in a hand-written migration that preserves the sequence's current value; otherwise the new identity restarts at 1 and the next insert collides. serial and bigserial remain supported for existing schemas.

Source: https://github.com/drizzle-team/drizzle-orm/releases

drizzle postgres migrations

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