def get_pages():
  return db.select('pages', order='id DESC')

def get_page_by_url(url):
  try:
    return db.select('pages', where='url=$url', vars=locals())[0]
  except IndexError:
    return None

def get_page_by_id(id):
  try:
    return db.select('pages', where='id=$id', vars=locals())[0]
  except IndexError:
    return None

def new_page(url, title, text):
  db.insert('pages', url=url, title=title, content=text)

def del_page(id):
  db.delete('pages', where="id=$id", vars=locals())

def update_page(id, url, title, text):
  db.update('pages', where="id=$id", vars=locals(),
    url=url, title=title, content=text)

CREATE TABLE pages (
  id INT AUTO_INCREMENT,
  url TEXT,
  title TEXT,
  content TEXT,
  primary key (id)
);