Execution example::

  table_create Documents TABLE_NO_KEY
  # [[0, 1337566253.89858, 0.000355720520019531], true]
  column_create Documents content COLUMN_SCALAR Text
  # [[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 documents_content_index COLUMN_INDEX|WITH_POSITION Documents content
  # [[0, 1337566253.89858, 0.000355720520019531], true]
  load --table Documents
  [
  ["content"],
  ["Groonga is a fast and accurate full text search engine based on inverted index. One of the characteristics of groonga is that a newly registered document instantly appears in search results. Also, groonga allows updates without read locks. These characteristics result in superior performance on real-time applications."],
  ["Groonga is also a column-oriented database management system (DBMS). Compared with well-known row-oriented systems, such as MySQL and PostgreSQL, column-oriented systems are more suited for aggregate queries. Due to this advantage, groonga can cover weakness of row-oriented systems."]
  ]
  # [[0, 1337566253.89858, 0.000355720520019531], 2]
