# File lib/brakeman/checks/check_sql.rb, line 494
  def check_hash_values exp
    hash_iterate(exp) do |key, value|
      if symbol? key
        unsafe = case key.value
                 when :conditions, :having, :select
                   check_query_arguments value
                 when :order, :group
                   check_order_arguments value
                 when :joins
                   check_joins_arguments value
                 when :lock
                   check_lock_arguments value
                 when :from
                   unsafe_sql? value
                 else
                   nil
                 end

        return unsafe if unsafe
      end
    end

    false
  end