public function initializeSchema()
{
$schema = new Schema();
$statements = $schema->toSql($this->connection->getDriver()->getDatabasePlatform());
foreach ($statements as $statement) {
$this->connection->exec($statement);
}
$this->connection->exec(sprintf('INSERT INTO version (date, phpbench_version) VALUES ("%s", "%s")', date('c'), PhpBench::VERSION));
}