IntrospectPostgreSQL - Drizzle Orm

Drizzle Kit provides a CLI command to introspect your database and generate a schema file with migrations. The schema file contains all the information about your database tables, columns, relations, and indices.

For example, you have such table in your database:

sql

CREATE TABLE IF NOT EXISTS "users" (
	"id" integer PRIMARY KEY GENERATED ALWAYS AS IDENTITY (sequence name "users_id_seq" INCREMENT BY 1 MINVALUE 1 MAXVALUE 2147483647 START WITH 1 CACHE 1),
	"name" varchar(255) NOT NULL,
	"age" integer NOT NULL,
	"email" varchar(255) NOT NULL,
	CONSTRAINT "users_email_unique" UNIQUE("email")
);

Pull your database schema:

bash

npx drizzle-kit pull --init

The result of introspection will be a schema.ts file, meta folder with snapshots of your database schema, sql file with the migration and relations.ts file for relational queries.

Here is an example of the generated schema.ts file:

typescript

// table schema generated by introspection
import { pgTable, unique, integer, varchar } from "drizzle-orm/pg-core"
import { sql } from "drizzle-orm"

export const users = pgTable("users", {
	id: integer().primaryKey().generatedAlwaysAsIdentity({ name: "users_id_seq", startWith: 1, increment: 1, minValue: 1, maxValue: 2147483647, cache: 1 }),
	name: varchar({ length: 255 }).notNull(),
	age: integer().notNull(),
	email: varchar({ length: 255 }).notNull(),
}, (table) => [
	unique("users_email_unique").on(table.email)
]);

Learn more about introspection in the documentation.