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452 lines
14 KiB
452 lines
14 KiB
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Ole Ostergaard <ole.c.ostergaard@gmail.com>
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* @author Ole Ostergaard <ole.ostergaard@knime.com>
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* @author Philipp Schaffrath <github@philipp.schaffrath.email>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\DB;
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use Doctrine\Common\EventManager;
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use Doctrine\DBAL\Cache\QueryCacheProfile;
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use Doctrine\DBAL\Configuration;
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use Doctrine\DBAL\DBALException;
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use Doctrine\DBAL\Driver;
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use Doctrine\DBAL\Exception\ConstraintViolationException;
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use Doctrine\DBAL\Platforms\MySqlPlatform;
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use Doctrine\DBAL\Schema\Schema;
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use OC\DB\QueryBuilder\QueryBuilder;
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use OCP\DB\QueryBuilder\IQueryBuilder;
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use OCP\IDBConnection;
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use OCP\PreConditionNotMetException;
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class Connection extends ReconnectWrapper 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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/**
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* @var \OC\DB\Adapter $adapter
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*/
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protected $adapter;
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protected $lockedTable = null;
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public function connect() {
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try {
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return parent::connect();
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} catch (DBALException $e) {
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// throw a new exception to prevent leaking info from the stacktrace
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throw new DBALException('Failed to connect to the database: ' . $e->getMessage(), $e->getCode());
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}
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}
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/**
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* Returns a QueryBuilder for the connection.
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*
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* @return \OCP\DB\QueryBuilder\IQueryBuilder
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*/
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public function getQueryBuilder() {
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return new QueryBuilder(
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$this,
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\OC::$server->getSystemConfig(),
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\OC::$server->getLogger()
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);
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}
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/**
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* Gets the QueryBuilder for the connection.
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*
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* @return \Doctrine\DBAL\Query\QueryBuilder
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* @deprecated please use $this->getQueryBuilder() instead
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*/
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public function createQueryBuilder() {
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$backtrace = $this->getCallerBacktrace();
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\OC::$server->getLogger()->debug('Doctrine QueryBuilder retrieved in {backtrace}', ['app' => 'core', 'backtrace' => $backtrace]);
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return parent::createQueryBuilder();
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}
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/**
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* Gets the ExpressionBuilder for the connection.
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*
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* @return \Doctrine\DBAL\Query\Expression\ExpressionBuilder
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* @deprecated please use $this->getQueryBuilder()->expr() instead
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*/
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public function getExpressionBuilder() {
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$backtrace = $this->getCallerBacktrace();
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\OC::$server->getLogger()->debug('Doctrine ExpressionBuilder retrieved in {backtrace}', ['app' => 'core', 'backtrace' => $backtrace]);
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return parent::getExpressionBuilder();
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}
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/**
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* Get the file and line that called the method where `getCallerBacktrace()` was used
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*
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* @return string
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*/
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protected function getCallerBacktrace() {
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$traces = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
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// 0 is the method where we use `getCallerBacktrace`
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// 1 is the target method which uses the method we want to log
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if (isset($traces[1])) {
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return $traces[1]['file'] . ':' . $traces[1]['line'];
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}
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return '';
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}
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/**
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* @return string
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*/
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public function getPrefix() {
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return $this->tablePrefix;
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}
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/**
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* Initializes a new instance of the Connection class.
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*
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* @param array $params The connection parameters.
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* @param \Doctrine\DBAL\Driver $driver
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* @param \Doctrine\DBAL\Configuration $config
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* @param \Doctrine\Common\EventManager $eventManager
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* @throws \Exception
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*/
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public function __construct(array $params, Driver $driver, Configuration $config = null,
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EventManager $eventManager = null) {
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if (!isset($params['adapter'])) {
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throw new \Exception('adapter not set');
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}
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if (!isset($params['tablePrefix'])) {
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throw new \Exception('tablePrefix not set');
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}
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parent::__construct($params, $driver, $config, $eventManager);
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$this->adapter = new $params['adapter']($this);
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$this->tablePrefix = $params['tablePrefix'];
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}
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/**
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* Prepares an SQL statement.
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*
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* @param string $statement The SQL statement to prepare.
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* @param int $limit
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* @param int $offset
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* @return \Doctrine\DBAL\Driver\Statement The prepared statement.
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*/
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public function prepare($statement, $limit=null, $offset=null) {
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if ($limit === -1) {
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$limit = null;
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}
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if (!is_null($limit)) {
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$platform = $this->getDatabasePlatform();
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$statement = $platform->modifyLimitQuery($statement, $limit, $offset);
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}
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$statement = $this->replaceTablePrefix($statement);
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$statement = $this->adapter->fixupStatement($statement);
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return parent::prepare($statement);
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}
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/**
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* Executes an, optionally parametrized, SQL query.
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*
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* If the query is parametrized, a prepared statement is used.
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* If an SQLLogger is configured, the execution is logged.
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*
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* @param string $query The SQL query to execute.
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* @param array $params The parameters to bind to the query, if any.
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* @param array $types The types the previous parameters are in.
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* @param \Doctrine\DBAL\Cache\QueryCacheProfile|null $qcp The query cache profile, optional.
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*
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* @return \Doctrine\DBAL\Driver\Statement The executed statement.
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*
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* @throws \Doctrine\DBAL\DBALException
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*/
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public function executeQuery($query, array $params = [], $types = [], QueryCacheProfile $qcp = null) {
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$query = $this->replaceTablePrefix($query);
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$query = $this->adapter->fixupStatement($query);
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return parent::executeQuery($query, $params, $types, $qcp);
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}
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/**
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* Executes an SQL INSERT/UPDATE/DELETE query with the given parameters
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* and returns the number of affected rows.
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*
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* This method supports PDO binding types as well as DBAL mapping types.
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*
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* @param string $query The SQL query.
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* @param array $params The query parameters.
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* @param array $types The parameter types.
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*
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* @return integer The number of affected rows.
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*
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* @throws \Doctrine\DBAL\DBALException
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*/
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public function executeUpdate($query, array $params = [], array $types = []) {
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$query = $this->replaceTablePrefix($query);
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$query = $this->adapter->fixupStatement($query);
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return parent::executeUpdate($query, $params, $types);
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}
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/**
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* Returns the ID of the last inserted row, or the last value from a sequence object,
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* depending on the underlying driver.
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*
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* Note: This method may not return a meaningful or consistent result across different drivers,
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* because the underlying database may not even support the notion of AUTO_INCREMENT/IDENTITY
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* columns or sequences.
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*
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* @param string $seqName Name of the sequence object from which the ID should be returned.
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* @return string A string representation of the last inserted ID.
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*/
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public function lastInsertId($seqName = null) {
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if ($seqName) {
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$seqName = $this->replaceTablePrefix($seqName);
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}
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return $this->adapter->lastInsertId($seqName);
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}
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// internal use
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public function realLastInsertId($seqName = null) {
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return parent::lastInsertId($seqName);
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}
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/**
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* Insert a row if the matching row does not exists. To accomplish proper race condition avoidance
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* it is needed that there is also a unique constraint on the values. Then this method will
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* catch the exception and return 0.
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*
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* @param string $table The table name (will replace *PREFIX* with the actual prefix)
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* @param array $input data that should be inserted into the table (column name => value)
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* @param array|null $compare List of values that should be checked for "if not exists"
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* If this is null or an empty array, all keys of $input will be compared
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* Please note: text fields (clob) must not be used in the compare array
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* @return int number of inserted rows
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* @throws \Doctrine\DBAL\DBALException
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* @deprecated 15.0.0 - use unique index and "try { $db->insert() } catch (UniqueConstraintViolationException $e) {}" instead, because it is more reliable and does not have the risk for deadlocks - see https://github.com/nextcloud/server/pull/12371
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*/
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public function insertIfNotExist($table, $input, array $compare = null) {
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return $this->adapter->insertIfNotExist($table, $input, $compare);
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}
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public function insertIgnoreConflict(string $table, array $values) : int {
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return $this->adapter->insertIgnoreConflict($table, $values);
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}
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private function getType($value) {
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if (is_bool($value)) {
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return IQueryBuilder::PARAM_BOOL;
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} elseif (is_int($value)) {
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return IQueryBuilder::PARAM_INT;
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} else {
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return IQueryBuilder::PARAM_STR;
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}
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}
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/**
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* Insert or update a row value
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*
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* @param string $table
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* @param array $keys (column name => value)
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* @param array $values (column name => value)
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* @param array $updatePreconditionValues ensure values match preconditions (column name => value)
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* @return int number of new rows
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* @throws \Doctrine\DBAL\DBALException
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* @throws PreConditionNotMetException
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*/
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public function setValues($table, array $keys, array $values, array $updatePreconditionValues = []) {
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try {
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$insertQb = $this->getQueryBuilder();
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$insertQb->insert($table)
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->values(
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array_map(function ($value) use ($insertQb) {
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return $insertQb->createNamedParameter($value, $this->getType($value));
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}, array_merge($keys, $values))
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);
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return $insertQb->execute();
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} catch (ConstraintViolationException $e) {
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// value already exists, try update
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$updateQb = $this->getQueryBuilder();
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$updateQb->update($table);
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foreach ($values as $name => $value) {
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$updateQb->set($name, $updateQb->createNamedParameter($value, $this->getType($value)));
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}
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$where = $updateQb->expr()->andX();
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$whereValues = array_merge($keys, $updatePreconditionValues);
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foreach ($whereValues as $name => $value) {
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$where->add($updateQb->expr()->eq(
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$name,
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$updateQb->createNamedParameter($value, $this->getType($value)),
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$this->getType($value)
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));
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}
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$updateQb->where($where);
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$affected = $updateQb->execute();
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if ($affected === 0 && !empty($updatePreconditionValues)) {
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throw new PreConditionNotMetException();
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}
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return 0;
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}
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}
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/**
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* Create an exclusive read+write lock on a table
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*
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* @param string $tableName
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* @throws \BadMethodCallException When trying to acquire a second lock
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* @since 9.1.0
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*/
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public function lockTable($tableName) {
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if ($this->lockedTable !== null) {
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throw new \BadMethodCallException('Can not lock a new table until the previous lock is released.');
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}
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$tableName = $this->tablePrefix . $tableName;
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$this->lockedTable = $tableName;
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$this->adapter->lockTable($tableName);
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}
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/**
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* Release a previous acquired lock again
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*
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* @since 9.1.0
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*/
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public function unlockTable() {
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$this->adapter->unlockTable();
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$this->lockedTable = null;
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}
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/**
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* returns the error code and message as a string for logging
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* works with DoctrineException
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* @return string
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*/
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public function getError() {
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$msg = $this->errorCode() . ': ';
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$errorInfo = $this->errorInfo();
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if (is_array($errorInfo)) {
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$msg .= 'SQLSTATE = '.$errorInfo[0] . ', ';
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$msg .= 'Driver Code = '.$errorInfo[1] . ', ';
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$msg .= 'Driver Message = '.$errorInfo[2];
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}
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return $msg;
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}
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/**
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* Drop a table from the database if it exists
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*
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* @param string $table table name without the prefix
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*/
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public function dropTable($table) {
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$table = $this->tablePrefix . trim($table);
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$schema = $this->getSchemaManager();
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if ($schema->tablesExist([$table])) {
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$schema->dropTable($table);
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}
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}
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/**
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* Check if a table exists
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*
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* @param string $table table name without the prefix
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* @return bool
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*/
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public function tableExists($table) {
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$table = $this->tablePrefix . trim($table);
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$schema = $this->getSchemaManager();
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return $schema->tablesExist([$table]);
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}
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// internal use
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/**
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* @param string $statement
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* @return string
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*/
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protected function replaceTablePrefix($statement) {
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return str_replace('*PREFIX*', $this->tablePrefix, $statement);
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}
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/**
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* Check if a transaction is active
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*
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* @return bool
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* @since 8.2.0
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*/
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public function inTransaction() {
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return $this->getTransactionNestingLevel() > 0;
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}
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/**
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* Escape a parameter to be used in a LIKE query
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*
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* @param string $param
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* @return string
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*/
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public function escapeLikeParameter($param) {
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return addcslashes($param, '\\_%');
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}
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/**
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* Check whether or not the current database support 4byte wide unicode
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*
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* @return bool
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* @since 11.0.0
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*/
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public function supports4ByteText() {
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if (!$this->getDatabasePlatform() instanceof MySqlPlatform) {
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return true;
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}
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return $this->getParams()['charset'] === 'utf8mb4';
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}
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/**
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* Create the schema of the connected database
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*
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* @return Schema
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*/
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public function createSchema() {
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$schemaManager = new MDB2SchemaManager($this);
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$migrator = $schemaManager->getMigrator();
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return $migrator->createSchema();
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}
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/**
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* Migrate the database to the given schema
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*
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* @param Schema $toSchema
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*/
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public function migrateToSchema(Schema $toSchema) {
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$schemaManager = new MDB2SchemaManager($this);
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$migrator = $schemaManager->getMigrator();
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$migrator->migrate($toSchema);
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}
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}
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