module Sequel::Oracle::Dataset::ArgumentMapper

def prepared_arg(k)

arguments.
Oracle uses a : before the name of the argument for named
def prepared_arg(k)
  y, type = k.to_s.split("__", 2)
  prepared_args << [y.to_sym, type]
  i = prepared_args.length
  LiteralString.new(":#{i}")
end