CREATE TABLE lti2_tool (
  tool_pk SERIAL,
  name varchar(50) NOT NULL,
  consumer_key varchar(255) DEFAULT NULL,
  secret varchar(1024) DEFAULT NULL,
  message_url varchar(255) DEFAULT NULL,
  initiate_login_url varchar(255) DEFAULT NULL,
  redirection_uris text DEFAULT NULL,
  public_key text DEFAULT NULL,
  lti_version varchar(10) DEFAULT NULL,
  signature_method varchar(15) NOT NULL DEFAULT 'HMAC-SHA1',
  settings text DEFAULT NULL,
  enabled boolean NOT NULL,
  enable_from timestamp DEFAULT NULL,
  enable_until timestamp DEFAULT NULL,
  last_access date DEFAULT NULL,
  created timestamp NOT NULL,
  updated timestamp NOT NULL,
  PRIMARY KEY (tool_pk),
  UNIQUE (initiate_login_url)
);