Changes in v1

This page shows everything that changed from drizzle-orm@0.x, drizzle-kit@0.x, drizzle-seed@0.x to the latest drizzle-orm@1.0, drizzle-kit@1.0, drizzle-seed@1.0

Breaking changes

Relational Queries v1 removed

RQBv1 has been removed. Use Relational Queries v2 with the new defineRelations() API instead and new features. You can find more details about migrating from rqb v1 to v2 here

A new relations system built around defineRelations():

import { defineRelations } from 'drizzle-orm';

const relations = defineRelations(schema, (r) => ({
  users: {
    posts: r.many.posts(),
    profile: r.one.profiles(),
  },
  posts: {
    author: r.one.users({
      from: posts.authorId,
      to: users.id,
    }),
  },
}));

Validator packages consolidated into drizzle-orm

• drizzle-zod -> drizzle-orm/zod
• drizzle-valibot -> drizzle-orm/valibot
• drizzle-typebox -> drizzle-orm/typebox-legacy (using @sinclair/typebox)
• drizzle-typebox -> drizzle-orm/typebox (using typebox)
• drizzle-arktype -> drizzle-orm/arktype
• new drizzle-orm/effect-schema package added

New Casing API

The legacy drizzle({ casing: 'camelCase' }) has been replaced with a table/view/schema-level API:

import { snakeCase, camelCase } from 'drizzle-orm/mysql-core';

export const users = snakeCase.table('users', {
  id: int().primaryKey().autoincrement(),
  fullName: text(),       // → full_name in DB
  createdAt: timestamp(), // → created_at in DB
});

// Available on all entity types:
snakeCase.table / snakeCase.view / snakeCase.materializedView / snakeCase.schema
camelCase.table / camelCase.view / camelCase.materializedView / camelCase.schema

.generatedAlwaysAs() only accepts SQL

// ❌ Before — accepted raw values
.generatedAlwaysAs('some expression')

// ✅ After — only sql`` or () => sql``
.generatedAlwaysAs(sql`some expression`)
.generatedAlwaysAs(() => sql`some expression`)

getTableColumns deprecation

Use getColumns instead

// ❌ Before
import { getTableColumns } from 'drizzle-orm';

const columns = getTableColumns(users);

// ✅ After
import { getColumns } from 'drizzle-orm';

const columns = getColumns(users);

New migration folder structure (v3)

Linked discussion: #2832

• No more journal.json
• SQL files and snapshots grouped into separate migration folders
• drizzle-kit drop command removed

These changes eliminate potential Git conflicts with the journal file and simplify the process of dropping or fixing conflicted migrations

drizzle-kit push --strict deprecation

The --strict flag has been removed — its behavior is now the default. drizzle-kit push always prompts for confirmation for data-loss statements unless the --force flag is passed. Use drizzle-kit push —explain to preview the SQL that would be executed before running it.

Drizzle seed: UUID generator upgraded to v4

The UUID generator now produces RFC 4122 v4 compliant UUIDs, ensuring compatibility with Zod v4 validation. Use { version: '1' } to keep old behavior, or { version: '2' | '3' } for newer generators.

Other features

New data types

New column types have been added to the MySQL dialect: blob, tinyblob, mediumblob, and longblob. You can read more here.

import { mysqlTable, blob, tinyblob, mediumblob, longblob } from 'drizzle-orm/mysql-core';

const files = mysqlTable('files', {
  tiny: tinyblob(),
  regular: blob(),
  medium: mediumblob(),
  large: longblob(),
});

JIT Mappers (opt-in)

Just-in-time compiled row mappers that make mapping as fast as the raw driver. You can find out more here

const db = drizzle({ ..., jit: true });

New MSSQL dialect

New MSSQL dialect support added. You can read more here

New CockroachDB dialect

New CockroachDB dialect support added. You can read more here

New NetlifyDB driver

New NetlifyDB driver support added. You can read more here

SQLcommenter support

Add custom tags to queries. Tags are appended as SQL comments at the end of each query. You can read more here

db.select().from(users).comment("my_first_tag");
// select "id", "name" from "users" /*my_first_tag*/

Column aliases via .as()

You can find out more aliasing info here

const query = db
  .select({ age: users.age.as('ageOfUser'), id: users.id.as('userId') })
  .from(users)
  .orderBy(asc(users.id.as('userId')));

Full drizzle-kit rewrite

The kit has been architecturally redesigned:

• Migrated from database snapshots to DDL snapshots
• Reworked diff detection and application
• Schema introspection reduced from ~10s to < 1s
• Added query hints and explain support for push

drizzle-kit pull --init

Creates the drizzle migration table and marks the first pulled migration as applied. You can read more here

drizzle-kit push --explain

Shows the SQL that would be executed without actually running it. You can read more here

drizzle-kit check — commutativity check

Detects non-commutative migrations across branches — e.g., two branches altering the same column, or one renaming a table that another is altering.

How it works:

• Builds a DAG from snapshot prevIds to understand branch structure
• Finds fork points where branches diverged
• Computes the DDL diff from parent snapshot to each branch leaf
• Checks conflicts using a footprint map of which DDL statement types can interfere

If conflicts are found, the report tells you exactly which migrations on which branches are incompatible and which statements collide.

drizzle-kit --ignore-conflicts flag

Bypasses commutativity checks when you know the conflicts are expected.

drizzle-kit generate: migration conflict detection

drizzle-kit generate now identifies incompatible changes across migration branches. Use --ignore-conflicts to bypass.

Updates to the migration table

The migration table is automatically upgraded when you run drizzle-kit up. Two new columns are added:

• name — the full migration folder name (e.g. 20250220153045_brave_wolverine)
• applied_at — timestamp of when the migration was executed (pre-existing rows are backfilled with NULL)

Migrations are now matched by their full folder name instead of timestamps. Even if two migrations are generated within the same second, the name suffix guarantees uniqueness.

During the upgrade, existing rows are backfilled using a multi-step strategy:

1. Millis match — truncate stored millis to seconds, match against local folder timestamps
2. Hash tiebreaker — if multiple migrations share the same second, disambiguate via the SQL hash
3. Hash-only fallback — if millis matching fails entirely, match by hash alone

This means the upgrade handles all edge cases: normal single-developer projects, teams with closely-timed migrations, and even cases where the old journal data doesn’t perfectly align with the new folder names.

Migrator applies all missing migrations

Previously the migrator only looked for local migrations with a creation date later than the last applied one. Now it detects and applies every missing migration, regardless of timestamp ordering. All migrations are matched against the full folder name (14-digit UTC timestamp + name suffix).

Top-level await in drizzle config files

Top-level await is now supported in drizzle.config.ts and schema files on Node.js.

Drizzle-kit: Build system improvements

• Migrated from esbuild-register to tsx loader — seamless ESM and CJS support
• Native Bun and Deno launch support

TS Schema file processing

Only files with the following extensions are processed: .js, .mjs, .cjs, .jsx, .ts, .mts, .cts, .tsx. All other file types are ignored.

Drizzle Seed: Ignore columns in refinements

Skip specific columns during seeding — the database default will be used instead:

await seed(db, schema).refine((f) => ({
  users: {
    count: 5,
    columns: {
      name: f.fullName(),
      photo: false, // skip — DB default will be used
    },
  },
}));

min / max parameters

Time-based generators now accept boundaries:

funcs.time({ min: '13:12:13', max: '15:12:13' })
funcs.timestamp({ min: '2024-01-01T00:00:00Z', max: '2025-01-01T00:00:00Z' })
funcs.datetime({ min: '2024-01-01', max: '2025-01-01' })