matrix-registration/schema.sql

CREATE TABLE IF NOT EXISTS registration_codes (
  code VARCHAR(60) NOT NULL UNIQUE,
  creationTime TIMESTAMP NOT NULL,
  expirationTime TIMESTAMP,
  usages INTEGER NOT NULL DEFAULT 0,
  maxUsages Integer NOT NULL DEFAULT 1
);

CREATE TABLE IF NOT EXISTS registered_users (
                                              registrationCode VARCHAR(60) NOT NULL UNIQUE,
                                              username         VARCHAR(30) NOT NULL UNIQUE,
                                              registeredTime   TIMESTAMP   NOT NULL
);

ALTER TABLE registered_users
  ADD COLUMN registeredUserId VARCHAR(60);