88 lines
2.5 KiB
PHP
88 lines
2.5 KiB
PHP
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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\db\mssql;
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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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* @author Timur Ruziev <resurtm@gmail.com>
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* @since 2.0
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*/
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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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