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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Db\Mssql\Pdo; |
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/** |
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* This is an extension of the default PDO class of MSSQL and DBLIB drivers. |
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* It provides workarounds for improperly implemented functionalities of the MSSQL and DBLIB drivers. |
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*/ |
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final class PDO extends \PDO |
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{ |
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/** |
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* Returns value of the last inserted ID. |
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* @param string|null $sequence the sequence name. Defaults to null. |
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* @return int last inserted ID value. |
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*/ |
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public function lastInsertId($sequence = null) |
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{ |
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return $this->query('SELECT CAST(COALESCE(SCOPE_IDENTITY(), @@IDENTITY) AS bigint)')->fetchColumn(); |
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} |
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/** |
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* Starts a transaction. It is necessary to override PDO's method as MSSQL PDO driver does not |
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* natively support transactions. |
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* @return bool the result of a transaction start. |
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*/ |
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public function beginTransaction() |
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{ |
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$this->exec('BEGIN TRANSACTION'); |
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return true; |
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} |
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/** |
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* Commits a transaction. It is necessary to override PDO's method as MSSQL PDO driver does not |
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* natively support transactions. |
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* @return bool the result of a transaction commit. |
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*/ |
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public function commit() |
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{ |
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$this->exec('COMMIT TRANSACTION'); |
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return true; |
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} |
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/** |
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* Rollbacks a transaction. It is necessary to override PDO's method as MSSQL PDO driver does not |
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* natively support transactions. |
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* @return bool the result of a transaction roll back. |
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*/ |
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public function rollBack() |
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{ |
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$this->exec('ROLLBACK TRANSACTION'); |
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return true; |
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} |
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/** |
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* Retrieve a database connection attribute. |
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* |
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* It is necessary to override PDO's method as some MSSQL PDO driver (e.g. dblib) does not |
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* support getting attributes. |
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* @param int $attribute One of the PDO::ATTR_* constants. |
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* @return mixed A successful call returns the value of the requested PDO attribute. |
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* An unsuccessful call returns null. |
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*/ |
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public function getAttribute($attribute) |
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{ |
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try { |
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return parent::getAttribute($attribute); |
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} catch (\PDOException $e) { |
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switch ($attribute) { |
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case self::ATTR_SERVER_VERSION: |
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return $this->query("SELECT CAST(SERVERPROPERTY('productversion') AS VARCHAR)")->fetchColumn(); |
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default: |
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throw $e; |
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} |
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} |
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} |
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} |
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yiisoft /
db-mssql
