miniflux-legacy/vendor/fguillot/picodb/lib/PicoDb/Driver/Mssql.php
2016-07-30 18:41:42 -04:00

179 lines
3.8 KiB
PHP

<?php
namespace PicoDb\Driver;
use PDO;
/**
* Microsoft SQL Server Driver
*
* @package PicoDb\Driver
* @author Algy Taylor <thomas.taylor@cmft.nhs.uk>
*/
class Mssql extends Base
{
/**
* List of required settings options
*
* @access protected
* @var array
*/
protected $requiredAttributes = array(
'hostname',
'username',
'password',
'database',
);
/**
* Table to store the schema version
*
* @access private
* @var array
*/
private $schemaTable = 'schema_version';
/**
* Create a new PDO connection
*
* @access public
* @param array $settings
*/
public function createConnection(array $settings)
{
$dsn = 'sqlsrv:Server=' . $settings['hostname'] . ';Database=' . $settings['database'];
if (! empty($settings['port'])) {
$dsn .= ';port=' . $settings['port'];
}
$this->pdo = new PDO($dsn, $settings['username'], $settings['password']);
if (isset($settings['schema_table'])) {
$this->schemaTable = $settings['schema_table'];
}
}
/**
* Enable foreign keys
*
* @access public
*/
public function enableForeignKeys()
{
$this->pdo->exec('EXEC sp_MSforeachtable @command1="ALTER TABLE ? CHECK CONSTRAINT ALL"; GO;');
}
/**
* Disable foreign keys
*
* @access public
*/
public function disableForeignKeys()
{
$this->pdo->exec('EXEC sp_MSforeachtable @command1="ALTER TABLE ? NOCHECK CONSTRAINT ALL"; GO;');
}
/**
* Return true if the error code is a duplicate key
*
* @access public
* @param integer $code
* @return boolean
*/
public function isDuplicateKeyError($code)
{
return $code == 2601;
}
/**
* Escape identifier
*
* https://msdn.microsoft.com/en-us/library/ms175874.aspx
*
* @access public
* @param string $identifier
* @return string
*/
public function escape($identifier)
{
return '['.$identifier.']';
}
/**
* Get non standard operator
*
* @access public
* @param string $operator
* @return string
*/
public function getOperator($operator)
{
if ($operator === 'LIKE' || $operator === 'ILIKE') {
return 'LIKE';
}
return '';
}
/**
* Get last inserted id
*
* @access public
* @return integer
*/
public function getLastId()
{
return $this->pdo->lastInsertId();
}
/**
* Get current schema version
*
* @access public
* @return integer
*/
public function getSchemaVersion()
{
$this->pdo->exec("CREATE TABLE IF NOT EXISTS [".$this->schemaTable."] ([version] INT DEFAULT '0')");
$rq = $this->pdo->prepare('SELECT [version] FROM ['.$this->schemaTable.']');
$rq->execute();
$result = $rq->fetchColumn();
if ($result !== false) {
return (int) $result;
}
else {
$this->pdo->exec('INSERT INTO ['.$this->schemaTable.'] VALUES(0)');
}
return 0;
}
/**
* Set current schema version
*
* @access public
* @param integer $version
*/
public function setSchemaVersion($version)
{
$rq = $this->pdo->prepare('UPDATE ['.$this->schemaTable.'] SET [version]=?');
$rq->execute(array($version));
}
/**
* Run EXPLAIN command
*
* @param string $sql
* @param array $values
* @return array
*/
public function explain($sql, array $values)
{
$this->getConnection()->exec('SET SHOWPLAN_ALL ON');
return $this->getConnection()->query($this->getSqlFromPreparedStatement($sql, $values))->fetchAll(PDO::FETCH_ASSOC);
}
}