Overridden to work around issues to MySQL not supporting transactional DDL.

Overrides DatabaseConnection::popCommittableTransactions

File

includes/database/mysql/database.inc, line 535

Class

DatabaseConnection_mysql

Code

protected function popCommittableTransactions() {
 // Commit all the committable layers.
 foreach (array_reverse ($this->transactionLayers ) as $name => $active) {
 // Stop once we found an active transaction.
 if ($active) {
 break;
 }
 // If there are no more layers left then we should commit.
 unset($this->transactionLayers [$name]);
 if (empty($this->transactionLayers )) {
 if (!$this->doCommit ()) {
 throw new DatabaseTransactionCommitFailedException ();
 }
 }
 else {
 // Attempt to release this savepoint in the standard way.
 try {
 $this->query ('RELEASE SAVEPOINT ' . $name);
 } catch (PDOException $e) {
 // However, in MySQL (InnoDB), savepoints are automatically committed
 // when tables are altered or created (DDL transactions are not
 // supported). This can cause exceptions due to trying to release
 // savepoints which no longer exist.
 //
 // To avoid exceptions when no actual error has occurred, we silently
 // succeed for MySQL error code 1305 ("SAVEPOINT does not exist").
 if ($e->errorInfo[1] == '1305') {
 // If one SAVEPOINT was released automatically, then all were.
 // Therefore, clean the transaction stack.
 $this->transactionLayers  = array();
 // We also have to explain to PDO that the transaction stack has
 // been cleaned-up.
 $this->doCommit ();
 }
 else {
 throw $e;
 }
 }
 }
 }
}

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