結果セットを表形式で表示

#!/usr/bin/env ruby

require 'dbi'

DBI.connect('DBI:OCI8:oracle', 'scott', 'tiger') {|dbh|

  dbh.execute("select * from tab") {|sth|

    rows = sth.fetch_all

    DBI::Utils::TableFormatter.ascii(sth.column_names, rows)

  }

}