/**
* {@inheritdoc}
*
* @link http://en.wikipedia.org/wiki/Isolation_(database_systems)
* @param string $isolationLevel
*/
public function begin($isolationLevel = null)
{
return $this->driver->beginTransaction($isolationLevel);
}
/**
* Perform set of atomic operations required to update table schema.
*
* @throws SchemaException
* @throws \Exception
*/
protected function updateSchema()
{
if ($this->primaryKeys != $this->dbPrimaryKeys) {
throw new SchemaException("Primary keys can not be changed for already exists table.");
}
$this->driver->beginTransaction();
try {
$this->updateColumns();
$this->updateIndexes();
$this->updateForeigns();
} catch (\Exception $exception) {
$this->driver->rollbackTransaction();
throw $exception;
}
$this->driver->commitTransaction();
}
