[FEATURE]: Allow for non sequential primary key for id of migrationsTable

[aydrian]

Describe what you want

For at least the pg-core dialect, it would be great if we had the option to set the id column type to something non sequential like a UUID. I have been trying Drizzle with CockroachDB and everything seems to be working okay but it does complain about the SERIAL id type on the migrationsTable. Sequential primary keys in distributed databases can cause hot spotting. CockroachDB recommends using a UUID with a default value of gen_random_uuid(). I don't think this will cause a problem in the long run but it would remove the warning when running a migration.

[AndriiSherman]

You can use uuid field in pg-core, I guess it's just missing in docs, will fix it!

import { pgTable, text, uuid } from "drizzle-orm/pg-core";

export const users = pgTable("users", {
    id: uuid("uuid1").defaultRandom(),
    name: text("name"),
});

Would that work for you?

Also you can use .default for any sql defaults, so you can write like this:

import { pgTable, text, uuid } from "drizzle-orm/pg-core";

export const users = pgTable("users", {
    id: uuid("uuid1").default(sql`gen_random_uuid()`),
    name: text("name"),
});

[AndriiSherman]

We have an example here: https://orm.drizzle.team/docs/column-types/pg#default-value
Just never made it in a list of types, just created an issue in docs repo: drizzle-team/drizzle-orm-docs#120

[aydrian]

I'm not referring to the tables I create in my schema, but rather the table Drizzle creates to hold information about migrations. It uses a serial type for the primary key.

[AndriiSherman]

makes sense, assigning to myself

[aydrian]

Just ran into another issue using push/migration after I added a foreign key to my schema. Looks like we don't yet support anonymous code blocks. We do have a ticket for it.

DO $$ BEGIN
 ALTER TABLE "count_downs" ADD CONSTRAINT "count_downs_id_lists_id_fk" FOREIGN KEY ("id") REFERENCES "lists"("id") ON DELETE no action ON UPDATE no action;
EXCEPTION
 WHEN duplicate_object THEN null;
END $$;