class Arel::Collectors::SQLString

def add_bind(bind)
  self << yield(@bind_index)
  @bind_index += 1
  self
end

def add_binds(binds, proc_for_binds = nil, &block)
  self << (@bind_index...@bind_index += binds.size).map(&block).join(", ")
  self
end

def initialize(*)
  super
  @bind_index = 1
end