replace_named_bind_variables

# File activerecord/lib/active_record/base.rb, line 2055
        def replace_named_bind_variables(statement, bind_vars) #:nodoc:
          statement.gsub(/:([a-zA-Z]\w*)/) do
            match = $1.to_sym
            if bind_vars.include?(match)
              quote_bound_value(bind_vars[match])
            else
              raise PreparedStatementInvalid, "missing value for :#{match} in #{statement}"
            end
          end
        end