select_one

# File activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb, line 18
        def select_one(arel, name = nil, binds = [])
          arel, binds = binds_from_relation(arel, binds)
          @connection.query_options.merge!(as: :hash)
          select_result(to_sql(arel, binds), name, binds) do |result|
            @connection.next_result while @connection.more_results?
            result.first
          end
        ensure
          @connection.query_options.merge!(as: :array)
        end