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<?php
/**
* Copyright (c) 2013 Bart Visscher <bartv@thisnet.nl>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC\DB;
use Doctrine\DBAL\Driver;
use Doctrine\DBAL\Configuration;
use Doctrine\DBAL\Cache\QueryCacheProfile;
use Doctrine\Common\EventManager;
class Connection extends \Doctrine\DBAL\Connection implements \OCP\IDBConnection {
/**
* @var string $tablePrefix
*/
protected $tablePrefix;
/**
* @var \OC\DB\Adapter $adapter
*/
protected $adapter;
/**
* @var \Doctrine\DBAL\Driver\Statement[] $preparedQueries
*/
protected $preparedQueries = array();
protected $cachingQueryStatementEnabled = true;
/**
* Initializes a new instance of the Connection class.
*
* @param array $params The connection parameters.
* @param \Doctrine\DBAL\Driver $driver
* @param \Doctrine\DBAL\Configuration $config
* @param \Doctrine\Common\EventManager $eventManager
* @throws \Exception
*/
public function __construct(array $params, Driver $driver, Configuration $config = null,
EventManager $eventManager = null)
{
if (!isset($params['adapter'])) {
throw new \Exception('adapter not set');
}
if (!isset($params['tablePrefix'])) {
throw new \Exception('tablePrefix not set');
}
parent::__construct($params, $driver, $config, $eventManager);
$this->adapter = new $params['adapter']($this);
$this->tablePrefix = $params['tablePrefix'];
}
/**
* Prepares an SQL statement.
*
* @param string $statement The SQL statement to prepare.
* @param int $limit
* @param int $offset
* @return \Doctrine\DBAL\Driver\Statement The prepared statement.
*/
public function prepare( $statement, $limit=null, $offset=null ) {
if ($limit === -1) {
$limit = null;
}
if (!is_null($limit)) {
$platform = $this->getDatabasePlatform();
$statement = $platform->modifyLimitQuery($statement, $limit, $offset);
} else {
if (isset($this->preparedQueries[$statement]) && $this->cachingQueryStatementEnabled) {
return $this->preparedQueries[$statement];
}
$origStatement = $statement;
}
$statement = $this->replaceTablePrefix($statement);
$statement = $this->adapter->fixupStatement($statement);
if(\OC_Config::getValue( 'log_query', false)) {
\OC_Log::write('core', 'DB prepare : '.$statement, \OC_Log::DEBUG);
}
$result = parent::prepare($statement);
if (is_null($limit) && $this->cachingQueryStatementEnabled) {
$this->preparedQueries[$origStatement] = $result;
}
return $result;
}
/**
* Executes an, optionally parameterized, SQL query.
*
* If the query is parameterized, a prepared statement is used.
* If an SQLLogger is configured, the execution is logged.
*
* @param string $query The SQL query to execute.
* @param array $params The parameters to bind to the query, if any.
* @param array $types The types the previous parameters are in.
* @param QueryCacheProfile $qcp
* @return \Doctrine\DBAL\Driver\Statement The executed statement.
* @internal PERF: Directly prepares a driver statement, not a wrapper.
*/
public function executeQuery($query, array $params = array(), $types = array(), QueryCacheProfile $qcp = null)
{
$query = $this->replaceTablePrefix($query);
$query = $this->adapter->fixupStatement($query);
return parent::executeQuery($query, $params, $types, $qcp);
}
/**
* Executes an SQL INSERT/UPDATE/DELETE query with the given parameters
* and returns the number of affected rows.
*
* This method supports PDO binding types as well as DBAL mapping types.
*
* @param string $query The SQL query.
* @param array $params The query parameters.
* @param array $types The parameter types.
* @return integer The number of affected rows.
* @internal PERF: Directly prepares a driver statement, not a wrapper.
*/
public function executeUpdate($query, array $params = array(), array $types = array())
{
$query = $this->replaceTablePrefix($query);
$query = $this->adapter->fixupStatement($query);
return parent::executeUpdate($query, $params, $types);
}
/**
* Returns the ID of the last inserted row, or the last value from a sequence object,
* depending on the underlying driver.
*
* Note: This method may not return a meaningful or consistent result across different drivers,
* because the underlying database may not even support the notion of AUTO_INCREMENT/IDENTITY
* columns or sequences.
*
* @param string $seqName Name of the sequence object from which the ID should be returned.
* @return string A string representation of the last inserted ID.
*/
public function lastInsertId($seqName = null)
{
if ($seqName) {
$seqName = $this->replaceTablePrefix($seqName);
}
return $this->adapter->lastInsertId($seqName);
}
// internal use
public function realLastInsertId($seqName = null)
{
return parent::lastInsertId($seqName);
}
/**
* @brief Insert a row if a matching row doesn't exists.
* @param string $table. The table to insert into in the form '*PREFIX*tableName'
* @param array $input. An array of fieldname/value pairs
* @return bool The return value from execute()
*/
public function insertIfNotExist($table, $input) {
return $this->adapter->insertIfNotExist($table, $input);
}
/**
* returns the error code and message as a string for logging
* works with DoctrineException
* @return string
*/
public function getError() {
$msg = $this->errorCode() . ': ';
$errorInfo = $this->errorInfo();
if (is_array($errorInfo)) {
$msg .= 'SQLSTATE = '.$errorInfo[0] . ', ';
$msg .= 'Driver Code = '.$errorInfo[1] . ', ';
$msg .= 'Driver Message = '.$errorInfo[2];
}
return $msg;
}
// internal use
/**
* @param string $statement
* @return string
*/
protected function replaceTablePrefix($statement) {
return str_replace( '*PREFIX*', $this->tablePrefix, $statement );
}
public function enableQueryStatementCaching() {
$this->cachingQueryStatementEnabled = true;
}
public function disableQueryStatementCaching() {
$this->cachingQueryStatementEnabled = false;
$this->preparedQueries = array();
}
}
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