colouring-montreal/migrations/009.user-deleted.down.sql

ALTER TABLE users DROP COLUMN IF EXISTS is_deleted;
ALTER TABLE users DROP COLUMN IF EXISTS deleted_on;

DROP INDEX IF EXISTS users_username_idx;
ALTER TABLE users ADD CONSTRAINT users_username_key UNIQUE (username);
Add user delete database migrations Apart from adding the delete-related columns, this migration replaces the existing unique constraint on the username with a unique index which has a WHERE clause, so that deleted usernames need not be unique. This is to avoid having to implement a special function for generating unique IDs just to keep the deleted username unique and under 30 chars. The deleted username can still use e.g. the initial part of the user_id but the uniqueness is not required. 2019-08-15 11:08:36 -04:00			`ALTER TABLE users DROP COLUMN IF EXISTS is_deleted;`
			`ALTER TABLE users DROP COLUMN IF EXISTS deleted_on;`

			`DROP INDEX IF EXISTS users_username_idx;`
			`ALTER TABLE users ADD CONSTRAINT users_username_key UNIQUE (username);`