Execution example::

  > table_create --name Blog2 --flags TABLE_HASH_KEY --key_type ShortText
  [[0,1317212798.90253,0.052986511],true]
  > column_create --table Blog2 --name title --flags COLUMN_SCALAR --type ShortText
  [[0,1317212799.156,0.028355347],true]
  > column_create --table Blog2 --name message --flags COLUMN_SCALAR --type ShortText
  [[0,1317212799.38486,0.040142104],true]
  > table_create --name IndexBlog2 --flags TABLE_PAT_KEY|KEY_NORMALIZE --key_type ShortText --default_tokenizer TokenBigram
  [[0,1317212799.62539,0.039673533],true]
  > column_create --table IndexBlog2 --name index_blog --flags COLUMN_INDEX|WITH_POSITION|WITH_SECTION --type Blog2 --source title,message
  [[0,1317212799.86551,0.079790187],true]
  > load --table Blog2
  > [
  > {"_key":"grn1","title":"groonga test","message":"groonga message"},
  > {"_key":"grn2","title":"baseball result","message":"rakutan eggs 4 - 4 groonga moritars"},
  > {"_key":"grn3","title":"groonga message","message":"none"}
  > ]
  [[0,1317212800.14589,1.001367315],3]