nextcloud/lib/private/db/connection.php

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<?php
/**
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* @author Bart Visscher <bartv@thisnet.nl>
* @author Joas Schilling <nickvergessen@owncloud.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <icewind@owncloud.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\DB;
use Doctrine\DBAL\DBALException;
use Doctrine\DBAL\Driver;
use Doctrine\DBAL\Configuration;
use Doctrine\DBAL\Cache\QueryCacheProfile;
use Doctrine\Common\EventManager;
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use OC\DB\QueryBuilder\ExpressionBuilder;
use OC\DB\QueryBuilder\QueryBuilder;
use OCP\IDBConnection;
class Connection extends \Doctrine\DBAL\Connection implements IDBConnection {
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/**
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* @var string $tablePrefix
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*/
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protected $tablePrefix;
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/**
* @var \OC\DB\Adapter $adapter
*/
protected $adapter;
public function connect() {
try {
return parent::connect();
} catch (DBALException $e) {
// throw a new exception to prevent leaking info from the stacktrace
throw new DBALException('Failed to connect to the database: ' . $e->getMessage(), $e->getCode());
}
}
/**
* Returns a QueryBuilder for the connection.
*
* @return \OCP\DB\QueryBuilder\IQueryBuilder
*/
public function getQueryBuilder() {
return new QueryBuilder($this);
}
/**
* Gets the QueryBuilder for the connection.
*
* @return \Doctrine\DBAL\Query\QueryBuilder
* @deprecated please use $this->getQueryBuilder() instead
*/
public function createQueryBuilder() {
$backtrace = $this->getCallerBacktrace();
\OC::$server->getLogger()->debug('Doctrine QueryBuilder retrieved in {backtrace}', ['app' => 'core', 'backtrace' => $backtrace]);
return parent::createQueryBuilder();
}
/**
* Gets the ExpressionBuilder for the connection.
*
* @return \Doctrine\DBAL\Query\Expression\ExpressionBuilder
* @deprecated please use $this->getQueryBuilder()->expr() instead
*/
public function getExpressionBuilder() {
$backtrace = $this->getCallerBacktrace();
\OC::$server->getLogger()->debug('Doctrine ExpressionBuilder retrieved in {backtrace}', ['app' => 'core', 'backtrace' => $backtrace]);
return parent::getExpressionBuilder();
}
/**
* Get the file and line that called the method where `getCallerBacktrace()` was used
*
* @return string
*/
protected function getCallerBacktrace() {
$traces = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
// 0 is the method where we use `getCallerBacktrace`
// 1 is the target method which uses the method we want to log
if (isset($traces[1])) {
return $traces[1]['file'] . ':' . $traces[1]['line'];
}
return '';
}
/**
* @return string
*/
public function getPrefix() {
return $this->tablePrefix;
}
/**
* Initializes a new instance of the Connection class.
*
* @param array $params The connection parameters.
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* @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'])) {
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throw new \Exception('adapter not set');
}
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if (!isset($params['tablePrefix'])) {
throw new \Exception('tablePrefix not set');
}
parent::__construct($params, $driver, $config, $eventManager);
$this->adapter = new $params['adapter']($this);
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$this->tablePrefix = $params['tablePrefix'];
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parent::setTransactionIsolation(parent::TRANSACTION_READ_COMMITTED);
}
/**
* Prepares an SQL statement.
*
* @param string $statement The SQL statement to prepare.
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* @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);
}
$statement = $this->replaceTablePrefix($statement);
$statement = $this->adapter->fixupStatement($statement);
if(\OC_Config::getValue( 'log_query', false)) {
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\OCP\Util::writeLog('core', 'DB prepare : '.$statement, \OCP\Util::DEBUG);
}
return parent::prepare($statement);
}
/**
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* Executes an, optionally parametrized, SQL query.
*
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* If the query is parametrized, a prepared statement is used.
* If an SQLLogger is configured, the execution is logged.
*
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* @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 \Doctrine\DBAL\Cache\QueryCacheProfile|null $qcp The query cache profile, optional.
*
* @return \Doctrine\DBAL\Driver\Statement The executed statement.
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*
* @throws \Doctrine\DBAL\DBALException
*/
public function executeQuery($query, array $params = array(), $types = array(), QueryCacheProfile $qcp = null)
{
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$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.
*
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* @param string $query The SQL query.
* @param array $params The query parameters.
* @param array $types The parameter types.
*
* @return integer The number of affected rows.
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*
* @throws \Doctrine\DBAL\DBALException
*/
public function executeUpdate($query, array $params = array(), array $types = array())
{
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$query = $this->replaceTablePrefix($query);
$query = $this->adapter->fixupStatement($query);
return parent::executeUpdate($query, $params, $types);
}
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/**
* 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($seqName = null) {
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return parent::lastInsertId($seqName);
}
/**
* Insert a row if the matching row does not exists.
*
* @param string $table The table name (will replace *PREFIX* with the actual prefix)
* @param array $input data that should be inserted into the table (column name => value)
* @param array|null $compare List of values that should be checked for "if not exists"
* If this is null or an empty array, all keys of $input will be compared
* Please note: text fields (clob) must not be used in the compare array
* @return int number of inserted rows
* @throws \Doctrine\DBAL\DBALException
*/
public function insertIfNotExist($table, $input, array $compare = null) {
return $this->adapter->insertIfNotExist($table, $input, $compare);
}
/**
* 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;
}
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/**
* Drop a table from the database if it exists
*
* @param string $table table name without the prefix
*/
public function dropTable($table) {
$table = $this->tablePrefix . trim($table);
$schema = $this->getSchemaManager();
if($schema->tablesExist(array($table))) {
$schema->dropTable($table);
}
}
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/**
* Check if a table exists
*
* @param string $table table name without the prefix
* @return bool
*/
public function tableExists($table){
$table = $this->tablePrefix . trim($table);
$schema = $this->getSchemaManager();
return $schema->tablesExist(array($table));
}
// internal use
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/**
* @param string $statement
* @return string
*/
protected function replaceTablePrefix($statement) {
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return str_replace( '*PREFIX*', $this->tablePrefix, $statement );
}
}