Execution example::

  table_create Entries TABLE_PAT_KEY ShortText
  # [[0, 1337566253.89858, 0.000355720520019531], true]
  column_create Entries content COLUMN_SCALAR Text
  # [[0, 1337566253.89858, 0.000355720520019531], true]
  column_create Entries n_likes COLUMN_SCALAR UInt32
  # [[0, 1337566253.89858, 0.000355720520019531], true]
  table_create Terms TABLE_PAT_KEY|KEY_NORMALIZE ShortText --default_tokenizer TokenBigram
  # [[0, 1337566253.89858, 0.000355720520019531], true]
  column_create Terms entries_key_index COLUMN_INDEX|WITH_POSITION Entries _key
  # [[0, 1337566253.89858, 0.000355720520019531], true]
  column_create Terms entries_content_index COLUMN_INDEX|WITH_POSITION Entries content
  # [[0, 1337566253.89858, 0.000355720520019531], true]
  load --table Entries
  [
  {"_key":    "The first post!",
   "content": "Welcome! This is my first post!",
   "n_likes": 5},
  {"_key":    "Groonga",
   "content": "I started to use groonga. It's very fast!",
   "n_likes": 10},
  {"_key":    "Mroonga",
   "content": "I also started to use mroonga. It's also very fast! Really fast!",
   "n_likes": 15},
  {"_key":    "Good-bye Senna",
   "content": "I migrated all Senna system!",
   "n_likes": 3},
  {"_key":    "Good-bye Tritonn",
   "content": "I also migrated all Tritonn system!",
   "n_likes": 3}
  ]
  # [[0, 1337566253.89858, 0.000355720520019531], 5]
