function Connection::rollBack

File

core/modules/mysql/src/Driver/Database/mysql/Connection.php, line 436

Class

Connection

MySQL implementation of \Drupal\Core\Database\Connection.

Namespace

Code

public function rollBack($savepoint_name = 'drupal_transaction') {
  // MySQL will automatically commit transactions when tables are altered or
  // created (DDL transactions are not supported). Prevent triggering an
  // exception to ensure that the error that has caused the rollback is
  // properly reported.
  if (!$this->connection
    ->inTransaction()) {
    // On PHP 7 $this->connection->inTransaction() will return TRUE and
    // $this->connection->rollback() does not throw an exception; the
    // following code is unreachable.
    // If \Drupal\Core\Database\Connection::rollBack() would throw an
    // exception then continue to throw an exception.
    if (!$this->inTransaction()) {
      throw new TransactionNoActiveException();
    }
    // A previous rollback to an earlier savepoint may mean that the savepoint
    // in question has already been accidentally committed.
    if (!isset($this->transactionLayers[$savepoint_name])) {
      throw new TransactionNoActiveException();
    }
    trigger_error('Rollback attempted when there is no active transaction. This can cause data integrity issues.', E_USER_WARNING);
    return;
  }
  return parent::rollBack($savepoint_name);
}