是否父事务
null Driver_Database_Driver_MySQLI_Transaction::is_root( )
158159160161162public
function
is_root()
{
if
(!
$this
->id)
return
false;
return
isset(Database_Driver_MySQLI_Transaction::
$transactions
[
$this
->_connection_id]) && key(Database_Driver_MySQLI_Transaction::
$transactions
[
$this
->_connection_id]) ==
$this
->id;
}