exec_explain

# File activerecord/lib/active_record/explain.rb, line 58
    def exec_explain(queries) # :nodoc:
      queries && queries.map do |sql, bind|
        [].tap do |msg|
          msg << "EXPLAIN for: #{sql}"
          unless bind.empty?
            bind_msg = bind.map {|col, val| [col.name, val]}.inspect
            msg.last << " #{bind_msg}"
          end
          msg << connection.explain(sql, bind)
        end.join("\n")
      end.join("\n")
    end