Execution example::

  table_create \
    --name Posts \
    --flags TABLE_NO_KEY
  # [[0,1337566253.89858,0.000355720520019531],true]
  column_create \
    --table Posts \
    --name title_html \
    --flags COLUMN_SCALAR \
    --type ShortText
  # [[0,1337566253.89858,0.000355720520019531],true]
  column_create \
    --table Posts \
    --name title_text \
    --flags COLUMN_SCALAR \
    --type ShortText \
    --source title_html \
    --generator 'html_untag(title_html)'
  # [[0,1337566253.89858,0.000355720520019531],true]
