Execution example::

  > table_create --name User --flags TABLE_HASH_KEY --key_type ShortText
  [[0,1317212836.80268,0.048923839],true]
  > column_create --table User --name username --flags COLUMN_SCALAR --type ShortText
  [[0,1317212837.05226,0.040322616],true]
  > column_create --table User --name friends --flags COLUMN_VECTOR --type User
  [[0,1317212837.29306,0.039978793],true]
  > column_create --table User --name index_friends --flags COLUMN_INDEX --type User --source friends
  [[0,1317212837.53369,0.067271637],true]
  > load --table User
  > [
  > {"_key":"ken","username":"健作","friends":["taro","jiro","tomo","moritapo"]}
  > {"_key":"moritapo","username":"森田","friends":["ken","tomo"]}
  > {"_key":"taro","username":"ぐるんが太郎","friends":["jiro","tomo"]}
  > {"_key":"jiro","username":"ぐるんが次郎","friends":["taro","tomo"]}
  > {"_key":"tomo","username":"トモちゃん","friends":["ken","hana"]}
  > {"_key":"hana","username":"花子","friends":["ken","taro","jiro","moritapo","tomo"]}
  > ]
  [[0,1317212837.80152,1.602221355],6]