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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Db\Mysql; |
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use PDO; |
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use Yiisoft\Db\Cache\QueryCache; |
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use Yiisoft\Db\Cache\SchemaCache; |
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use Yiisoft\Db\Command\Command; |
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use Yiisoft\Db\Connection\Connection as AbstractConnection; |
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use function constant; |
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/** |
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* The class Connection represents a connection to a database via [PDO](https://secure.php.net/manual/en/book.pdo.php). |
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*/ |
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final class Connection extends AbstractConnection |
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{ |
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private QueryCache $queryCache; |
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private SchemaCache $schemaCache; |
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public function __construct(string $dsn, QueryCache $queryCache, SchemaCache $schemaCache) |
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{ |
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$this->queryCache = $queryCache; |
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$this->schemaCache = $schemaCache; |
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parent::__construct($dsn, $queryCache); |
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} |
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/** |
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* Creates a command for execution. |
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* |
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* @param string|null $sql the SQL statement to be executed |
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* @param array $params the parameters to be bound to the SQL statement |
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* |
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* @return Command the DB command |
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*/ |
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public function createCommand(?string $sql = null, array $params = []): Command |
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{ |
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if ($sql !== null) { |
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$sql = $this->quoteSql($sql); |
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} |
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$command = new Command($this, $this->queryCache, $sql); |
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if ($this->logger !== null) { |
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$command->setLogger($this->logger); |
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} |
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if ($this->profiler !== null) { |
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$command->setProfiler($this->profiler); |
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} |
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return $command->bindValues($params); |
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} |
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/** |
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* Returns the schema information for the database opened by this connection. |
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* |
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* @return Schema the schema information for the database opened by this connection. |
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*/ |
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public function getSchema(): Schema |
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{ |
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return new Schema($this, $this->schemaCache); |
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} |
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/** |
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* Creates the PDO instance. |
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* |
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* This method is called by {@see open} to establish a DB connection. The default implementation will create a PHP |
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* PDO instance. You may override this method if the default PDO needs to be adapted for certain DBMS. |
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* |
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* @return PDO the pdo instance |
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*/ |
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protected function createPdoInstance(): PDO |
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{ |
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return new PDO($this->getDsn(), $this->getUsername(), $this->getPassword(), $this->getAttributes()); |
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} |
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/** |
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* Initializes the DB connection. |
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* |
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* This method is invoked right after the DB connection is established. |
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* |
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* The default implementation turns on `PDO::ATTR_EMULATE_PREPARES`. |
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* |
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* if {@see emulatePrepare} is true, and sets the database {@see charset} if it is not empty. |
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* |
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* It then triggers an {@see EVENT_AFTER_OPEN} event. |
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*/ |
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protected function initConnection(): void |
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{ |
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$pdo = $this->getPDO(); |
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if ($pdo !== null) { |
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$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); |
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if ($this->getEmulatePrepare() !== null && constant('PDO::ATTR_EMULATE_PREPARES')) { |
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$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, $this->getEmulatePrepare()); |
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} |
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$charset = $this->getCharset(); |
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if ($charset !== null) { |
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$pdo->exec('SET NAMES ' . $pdo->quote($charset)); |
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} |
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} |
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} |
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/** |
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* Returns the name of the DB driver. |
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* |
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* @return string name of the DB driver |
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*/ |
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public function getDriverName(): string |
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{ |
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return 'mysql'; |
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} |
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} |
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yiisoft /
db-mysql
