Connection::pushTransaction

public Connection::pushTransaction($name)

public function pushTransaction($name) {
  if (!$this->supportsTransactions()) {
    return;
  }
  if (isset($this->transactionLayers[$name])) {
    throw new TransactionNameNonUniqueException($name . " is already in use.");
  }
  // If we're already in a transaction then we want to create a savepoint
  // rather than try to create another transaction.
  if ($this->inTransaction()) {
    $this->query('SAVEPOINT ' . $name);
  }
  else {
    $this->connection->beginTransaction();
  }
  $this->transactionLayers[$name] = $name;
}