Move \OC\DB to PSR-4

Besides the statement wrapper that is moved to the legacy folder
(namepsace of shame folder)

31 files changed, 0 insertions, 4573 deletions

diff --git a/lib/private/db/adapter.php b/lib/private/db/adapter.php
deleted file mode 100644
index 9522f768c88..00000000000
--- a/lib/private/db/adapter.php
+++ /dev/null
@@ -1,95 +0,0 @@
-<?php
-/**
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Joas Schilling <nickvergessen@owncloud.com>
- * @author Jonny007-MKD <1-23-4-5@web.de>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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;
-
-/**
- * This handles the way we use to write queries, into something that can be
- * handled by the database abstraction layer.
- */
-class Adapter {
-
-	/**
-	 * @var \OC\DB\Connection $conn
-	 */
-	protected $conn;
-
-	public function __construct($conn) {
-		$this->conn = $conn;
-	}
-
-	/**
-	 * @param string $table name
-	 * @return int id of last insert statement
-	 */
-	public function lastInsertId($table) {
-		return $this->conn->realLastInsertId($table);
-	}
-
-	/**
-	 * @param string $statement that needs to be changed so the db can handle it
-	 * @return string changed statement
-	 */
-	public function fixupStatement($statement) {
-		return $statement;
-	}
-
-	/**
-	 * 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 $compare = null) {
-		if (empty($compare)) {
-			$compare = array_keys($input);
-		}
-		$query = 'INSERT INTO `' .$table . '` (`'
-			. implode('`,`', array_keys($input)) . '`) SELECT '
-			. str_repeat('?,', count($input)-1).'? ' // Is there a prettier alternative?
-			. 'FROM `' . $table . '` WHERE ';
-
-		$inserts = array_values($input);
-		foreach($compare as $key) {
-			$query .= '`' . $key . '`';
-			if (is_null($input[$key])) {
-				$query .= ' IS NULL AND ';
-			} else {
-				$inserts[] = $input[$key];
-				$query .= ' = ? AND ';
-			}
-		}
-		$query = substr($query, 0, strlen($query) - 5);
-		$query .= ' HAVING COUNT(*) = 0';
-
-		return $this->conn->executeUpdate($query, $inserts);
-	}
-}
diff --git a/lib/private/db/adaptermysql.php b/lib/private/db/adaptermysql.php
deleted file mode 100644
index ab87c589747..00000000000
--- a/lib/private/db/adaptermysql.php
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-/**
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- *
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License, version 3,
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *
- */
-
-
-namespace OC\DB;
-
-class AdapterMySQL extends Adapter {
-	public function fixupStatement($statement) {
-		$statement = str_replace(' ILIKE ', ' COLLATE utf8_general_ci LIKE ', $statement);
-		return $statement;
-	}
-}
diff --git a/lib/private/db/adapteroci8.php b/lib/private/db/adapteroci8.php
deleted file mode 100644
index 970d3eefa4d..00000000000
--- a/lib/private/db/adapteroci8.php
+++ /dev/null
@@ -1,50 +0,0 @@
-<?php
-/**
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License, version 3,
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *
- */
-
-
-namespace OC\DB;
-
-class AdapterOCI8 extends Adapter {
-	public function lastInsertId($table) {
-		if (is_null($table)) {
-			throw new \InvalidArgumentException('Oracle requires a table name to be passed into lastInsertId()');
-		}
-		if ($table !== null) {
-			$suffix = '_SEQ';
-			$table = '"' . $table . $suffix . '"';
-		}
-		return $this->conn->realLastInsertId($table);
-	}
-
-	const UNIX_TIMESTAMP_REPLACEMENT = "(cast(sys_extract_utc(systimestamp) as date) - date'1970-01-01') * 86400";
-
-	public function fixupStatement($statement) {
-		$statement = preg_replace('( LIKE \?)', '$0 ESCAPE \'\\\'', $statement);
-		$statement = preg_replace('/`(\w+)` ILIKE \?/', 'REGEXP_LIKE(`$1`, \'^\' || REPLACE(?, \'%\', \'.*\') || \'$\', \'i\')', $statement);
-		$statement = str_replace('`', '"', $statement);
-		$statement = str_ireplace('NOW()', 'CURRENT_TIMESTAMP', $statement);
-		$statement = str_ireplace('UNIX_TIMESTAMP()', self::UNIX_TIMESTAMP_REPLACEMENT, $statement);
-		return $statement;
-	}
-}
diff --git a/lib/private/db/adapterpgsql.php b/lib/private/db/adapterpgsql.php
deleted file mode 100644
index a7d9377a0bf..00000000000
--- a/lib/private/db/adapterpgsql.php
+++ /dev/null
@@ -1,37 +0,0 @@
-<?php
-/**
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Morris Jobke <hey@morrisjobke.de>
- *
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License, version 3,
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *
- */
-
-
-namespace OC\DB;
-
-class AdapterPgSql extends Adapter {
-	public function lastInsertId($table) {
-		return $this->conn->fetchColumn('SELECT lastval()');
-	}
-
-	const UNIX_TIMESTAMP_REPLACEMENT = 'cast(extract(epoch from current_timestamp) as integer)';
-	public function fixupStatement($statement) {
-		$statement = str_replace( '`', '"', $statement );
-		$statement = str_ireplace( 'UNIX_TIMESTAMP()', self::UNIX_TIMESTAMP_REPLACEMENT, $statement );
-		return $statement;
-	}
-}
diff --git a/lib/private/db/adaptersqlite.php b/lib/private/db/adaptersqlite.php
deleted file mode 100644
index d7769238abc..00000000000
--- a/lib/private/db/adaptersqlite.php
+++ /dev/null
@@ -1,74 +0,0 @@
-<?php
-/**
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Joas Schilling <nickvergessen@owncloud.com>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License, version 3,
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *
- */
-
-
-namespace OC\DB;
-
-class AdapterSqlite extends Adapter {
-	public function fixupStatement($statement) {
-		$statement = preg_replace('( I?LIKE \?)', '$0 ESCAPE \'\\\'', $statement);
-		$statement = preg_replace('/`(\w+)` ILIKE \?/', 'LOWER($1) LIKE LOWER(?)', $statement);
-		$statement = str_replace( '`', '"', $statement );
-		$statement = str_ireplace( 'NOW()', 'datetime(\'now\')', $statement );
-		$statement = str_ireplace( 'UNIX_TIMESTAMP()', 'strftime(\'%s\',\'now\')', $statement );
-		return $statement;
-	}
-
-	/**
-	 * 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 $compare = null) {
-		if (empty($compare)) {
-			$compare = array_keys($input);
-		}
-		$fieldList = '`' . implode('`,`', array_keys($input)) . '`';
-		$query = "INSERT INTO `$table` ($fieldList) SELECT "
-			. str_repeat('?,', count($input)-1).'? '
-			. " WHERE NOT EXISTS (SELECT 1 FROM `$table` WHERE ";
-
-		$inserts = array_values($input);
-		foreach($compare as $key) {
-			$query .= '`' . $key . '`';
-			if (is_null($input[$key])) {
-				$query .= ' IS NULL AND ';
-			} else {
-				$inserts[] = $input[$key];
-				$query .= ' = ? AND ';
-			}
-		}
-		$query = substr($query, 0, strlen($query) - 5);
-		$query .= ')';
-
-		return $this->conn->executeUpdate($query, $inserts);
-	}
-}
diff --git a/lib/private/db/connection.php b/lib/private/db/connection.php
deleted file mode 100644
index 7904fab0726..00000000000
--- a/lib/private/db/connection.php
+++ /dev/null
@@ -1,373 +0,0 @@
-<?php
-/**
- * @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 Robin McCorkell <robin@mccorkell.me.uk>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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;
-use OC\DB\QueryBuilder\QueryBuilder;
-use OCP\DB\QueryBuilder\IQueryBuilder;
-use OCP\IDBConnection;
-use OCP\PreconditionNotMetException;
-
-class Connection extends \Doctrine\DBAL\Connection implements IDBConnection {
-	/**
-	 * @var string $tablePrefix
-	 */
-	protected $tablePrefix;
-
-	/**
-	 * @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.
-	 * @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'];
-
-		parent::setTransactionIsolation(parent::TRANSACTION_READ_COMMITTED);
-	}
-
-	/**
-	 * 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);
-		}
-		$statement = $this->replaceTablePrefix($statement);
-		$statement = $this->adapter->fixupStatement($statement);
-
-		if(\OC::$server->getSystemConfig()->getValue( 'log_query', false)) {
-			\OCP\Util::writeLog('core', 'DB prepare : '.$statement, \OCP\Util::DEBUG);
-		}
-		return parent::prepare($statement);
-	}
-
-	/**
-	 * Executes an, optionally parametrized, SQL query.
-	 *
-	 * If the query is parametrized, 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 \Doctrine\DBAL\Cache\QueryCacheProfile|null $qcp    The query cache profile, optional.
-	 *
-	 * @return \Doctrine\DBAL\Driver\Statement The executed statement.
-	 *
-	 * @throws \Doctrine\DBAL\DBALException
-	 */
-	public function executeQuery($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  $types  The parameter types.
-	 *
-	 * @return integer The number of affected rows.
-	 *
-	 * @throws \Doctrine\DBAL\DBALException
-	 */
-	public function executeUpdate($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);
-	}
-
-	/**
-	 * 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, $compare);
-	}
-
-	private function getType($value) {
-		if (is_bool($value)) {
-			return IQueryBuilder::PARAM_BOOL;
-		} else if (is_int($value)) {
-			return IQueryBuilder::PARAM_INT;
-		} else {
-			return IQueryBuilder::PARAM_STR;
-		}
-	}
-
-	/**
-	 * Insert or update a row value
-	 *
-	 * @param string $table
-	 * @param array $keys (column name => value)
-	 * @param array $values (column name => value)
-	 * @param array $updatePreconditionValues ensure values match preconditions (column name => value)
-	 * @return int number of new rows
-	 * @throws \Doctrine\DBAL\DBALException
-	 * @throws PreconditionNotMetException
-	 */
-	public function setValues($table, array $keys, array $values, array $updatePreconditionValues = []) {
-		try {
-			$insertQb = $this->getQueryBuilder();
-			$insertQb->insert($table)
-				->values(
-					array_map(function($value) use ($insertQb) {
-						return $insertQb->createNamedParameter($value, $this->getType($value));
-					}, array_merge($keys, $values))
-				);
-			return $insertQb->execute();
-		} catch (\Doctrine\DBAL\Exception\ConstraintViolationException $e) {
-			// value already exists, try update
-			$updateQb = $this->getQueryBuilder();
-			$updateQb->update($table);
-			foreach ($values as $name => $value) {
-				$updateQb->set($name, $updateQb->createNamedParameter($value, $this->getType($value)));
-			}
-			$where = $updateQb->expr()->andx();
-			$whereValues = array_merge($keys, $updatePreconditionValues);
-			foreach ($whereValues as $name => $value) {
-				$where->add($updateQb->expr()->eq(
-					$name,
-					$updateQb->createNamedParameter($value, $this->getType($value)),
-					$this->getType($value)
-				));
-			}
-			$updateQb->where($where);
-			$affected = $updateQb->execute();
-
-			if ($affected === 0 && !empty($updatePreconditionValues)) {
-				throw new PreconditionNotMetException();
-			}
-
-			return 0;
-		}
-	}
-
-	/**
-	 * 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;
-	}
-
-	/**
-	 * 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);
-		}
-	}
-
-	/**
-	 * 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
-	/**
-	 * @param string $statement
-	 * @return string
-	 */
-	protected function replaceTablePrefix($statement) {
-		return str_replace( '*PREFIX*', $this->tablePrefix, $statement );
-	}
-
-	/**
-	 * Check if a transaction is active
-	 *
-	 * @return bool
-	 * @since 8.2.0
-	 */
-	public function inTransaction() {
-		return $this->getTransactionNestingLevel() > 0;
-	}
-
-	/**
-	 * Espace a parameter to be used in a LIKE query
-	 *
-	 * @param string $param
-	 * @return string
-	 */
-	public function escapeLikeParameter($param) {
-		return addcslashes($param, '\\_%');
-	}
-}
diff --git a/lib/private/db/connectionfactory.php b/lib/private/db/connectionfactory.php
deleted file mode 100644
index 0856d8d19c0..00000000000
--- a/lib/private/db/connectionfactory.php
+++ /dev/null
@@ -1,184 +0,0 @@
-<?php
-/**
- * @author Andreas Fischer <bantu@owncloud.com>
- * @author Jörn Friedrich Dreyer <jfd@butonic.de>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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\Event\Listeners\OracleSessionInit;
-use Doctrine\DBAL\Event\Listeners\SQLSessionInit;
-use Doctrine\DBAL\Event\Listeners\MysqlSessionInit;
-
-/**
-* Takes care of creating and configuring Doctrine connections.
-*/
-class ConnectionFactory {
-	/**
-	* @var array
-	*
-	* Array mapping DBMS type to default connection parameters passed to
-	* \Doctrine\DBAL\DriverManager::getConnection().
-	*/
-	protected $defaultConnectionParams = array(
-		'mysql' => array(
-			'adapter' => '\OC\DB\AdapterMySQL',
-			'charset' => 'UTF8',
-			'driver' => 'pdo_mysql',
-			'wrapperClass' => 'OC\DB\Connection',
-		),
-		'oci' => array(
-			'adapter' => '\OC\DB\AdapterOCI8',
-			'charset' => 'AL32UTF8',
-			'driver' => 'oci8',
-			'wrapperClass' => 'OC\DB\OracleConnection',
-		),
-		'pgsql' => array(
-			'adapter' => '\OC\DB\AdapterPgSql',
-			'driver' => 'pdo_pgsql',
-			'wrapperClass' => 'OC\DB\Connection',
-		),
-		'sqlite3' => array(
-			'adapter' => '\OC\DB\AdapterSqlite',
-			'driver' => 'pdo_sqlite',
-			'wrapperClass' => 'OC\DB\Connection',
-		),
-	);
-
-	/**
-	* @brief Get default connection parameters for a given DBMS.
-	* @param string $type DBMS type
-	* @throws \InvalidArgumentException If $type is invalid
-	* @return array Default connection parameters.
-	*/
-	public function getDefaultConnectionParams($type) {
-		$normalizedType = $this->normalizeType($type);
-		if (!isset($this->defaultConnectionParams[$normalizedType])) {
-			throw new \InvalidArgumentException("Unsupported type: $type");
-		}
-		$result = $this->defaultConnectionParams[$normalizedType];
-		// \PDO::MYSQL_ATTR_FOUND_ROWS may not be defined, e.g. when the MySQL
-		// driver is missing. In this case, we won't be able to connect anyway.
-		if ($normalizedType === 'mysql' && defined('\PDO::MYSQL_ATTR_FOUND_ROWS')) {
-			$result['driverOptions'] = array(
-				\PDO::MYSQL_ATTR_FOUND_ROWS => true,
-			);
-		}
-		return $result;
-	}
-
-	/**
-	* @brief Get default connection parameters for a given DBMS.
-	* @param string $type DBMS type
-	* @param array $additionalConnectionParams Additional connection parameters
-	* @return \OC\DB\Connection
-	*/
-	public function getConnection($type, $additionalConnectionParams) {
-		$normalizedType = $this->normalizeType($type);
-		$eventManager = new \Doctrine\Common\EventManager();
-		switch ($normalizedType) {
-			case 'mysql':
-				// Send "SET NAMES utf8". Only required on PHP 5.3 below 5.3.6.
-				// See http://stackoverflow.com/questions/4361459/php-pdo-charset-set-names#4361485
-				$eventManager->addEventSubscriber(new MysqlSessionInit);
-				$eventManager->addEventSubscriber(
-					new SQLSessionInit("SET SESSION AUTOCOMMIT=1"));
-				break;
-			case 'oci':
-				$eventManager->addEventSubscriber(new OracleSessionInit);
-				break;
-			case 'sqlite3':
-				$journalMode = $additionalConnectionParams['sqlite.journal_mode'];
-				$additionalConnectionParams['platform'] = new OCSqlitePlatform();
-				$eventManager->addEventSubscriber(new SQLiteSessionInit(true, $journalMode));
-				break;
-		}
-		$connection = \Doctrine\DBAL\DriverManager::getConnection(
-			array_merge($this->getDefaultConnectionParams($type), $additionalConnectionParams),
-			new \Doctrine\DBAL\Configuration(),
-			$eventManager
-		);
-		return $connection;
-	}
-
-	/**
-	* @brief Normalize DBMS type
-	* @param string $type DBMS type
-	* @return string Normalized DBMS type
-	*/
-	public function normalizeType($type) {
-		return $type === 'sqlite' ? 'sqlite3' : $type;
-	}
-
-	/**
-	* @brief Checks whether the specified DBMS type is valid.
-	* @return bool
-	*/
-	public function isValidType($type) {
-		$normalizedType = $this->normalizeType($type);
-		return isset($this->defaultConnectionParams[$normalizedType]);
-	}
-
-	/**
-	 * Create the connection parameters for the config
-	 *
-	 * @param \OC\SystemConfig $config
-	 * @return array
-	 */
-	public function createConnectionParams($config) {
-		$type = $config->getValue('dbtype', 'sqlite');
-
-		$connectionParams = array(
-			'user' => $config->getValue('dbuser', ''),
-			'password' => $config->getValue('dbpassword', ''),
-		);
-		$name = $config->getValue('dbname', 'owncloud');
-
-		if ($this->normalizeType($type) === 'sqlite3') {
-			$dataDir = $config->getValue("datadirectory", \OC::$SERVERROOT . '/data');
-			$connectionParams['path'] = $dataDir . '/' . $name . '.db';
-		} else {
-			$host = $config->getValue('dbhost', '');
-			if (strpos($host, ':')) {
-				// Host variable may carry a port or socket.
-				list($host, $portOrSocket) = explode(':', $host, 2);
-				if (ctype_digit($portOrSocket)) {
-					$connectionParams['port'] = $portOrSocket;
-				} else {
-					$connectionParams['unix_socket'] = $portOrSocket;
-				}
-			}
-			$connectionParams['host'] = $host;
-			$connectionParams['dbname'] = $name;
-		}
-
-		$connectionParams['tablePrefix'] = $config->getValue('dbtableprefix', 'oc_');
-		$connectionParams['sqlite.journal_mode'] = $config->getValue('sqlite.journal_mode', 'WAL');
-
-		//additional driver options, eg. for mysql ssl
-		$driverOptions = $config->getValue('dbdriveroptions', null);
-		if ($driverOptions) {
-			$connectionParams['driverOptions'] = $driverOptions;
-		}
-
-		return $connectionParams;
-	}
-}
diff --git a/lib/private/db/mdb2schemamanager.php b/lib/private/db/mdb2schemamanager.php
deleted file mode 100644
index f73f6b4351a..00000000000
--- a/lib/private/db/mdb2schemamanager.php
+++ /dev/null
@@ -1,178 +0,0 @@
-<?php
-/**
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Jörn Friedrich Dreyer <jfd@butonic.de>
- * @author Lukas Reschke <lukas@owncloud.com>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Roeland Jago Douma <rullzer@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- * @author Vincent Petry <pvince81@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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\Platforms\MySqlPlatform;
-use Doctrine\DBAL\Platforms\OraclePlatform;
-use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
-use Doctrine\DBAL\Platforms\SqlitePlatform;
-use OCP\IDBConnection;
-
-class MDB2SchemaManager {
-	/** @var \OC\DB\Connection $conn */
-	protected $conn;
-
-	/**
-	 * @param IDBConnection $conn
-	 */
-	public function __construct($conn) {
-		$this->conn = $conn;
-	}
-
-	/**
-	 * saves database scheme to xml file
-	 * @param string $file name of file
-	 * @return bool
-	 *
-	 * TODO: write more documentation
-	 */
-	public function getDbStructure($file) {
-		return \OC\DB\MDB2SchemaWriter::saveSchemaToFile($file, $this->conn);
-	}
-
-	/**
-	 * Creates tables from XML file
-	 * @param string $file file to read structure from
-	 * @return bool
-	 *
-	 * TODO: write more documentation
-	 */
-	public function createDbFromStructure($file) {
-		$schemaReader = new MDB2SchemaReader(\OC::$server->getConfig(), $this->conn->getDatabasePlatform());
-		$toSchema = $schemaReader->loadSchemaFromFile($file);
-		return $this->executeSchemaChange($toSchema);
-	}
-
-	/**
-	 * @return \OC\DB\Migrator
-	 */
-	public function getMigrator() {
-		$random = \OC::$server->getSecureRandom();
-		$platform = $this->conn->getDatabasePlatform();
-		$config = \OC::$server->getConfig();
-		$dispatcher = \OC::$server->getEventDispatcher();
-		if ($platform instanceof SqlitePlatform) {
-			return new SQLiteMigrator($this->conn, $random, $config, $dispatcher);
-		} else if ($platform instanceof OraclePlatform) {
-			return new OracleMigrator($this->conn, $random, $config, $dispatcher);
-		} else if ($platform instanceof MySqlPlatform) {
-			return new MySQLMigrator($this->conn, $random, $config, $dispatcher);
-		} else if ($platform instanceof PostgreSqlPlatform) {
-			return new Migrator($this->conn, $random, $config, $dispatcher);
-		} else {
-			return new NoCheckMigrator($this->conn, $random, $config, $dispatcher);
-		}
-	}
-
-	/**
-	 * Reads database schema from file
-	 *
-	 * @param string $file file to read from
-	 * @return \Doctrine\DBAL\Schema\Schema
-	 */
-	private function readSchemaFromFile($file) {
-		$platform = $this->conn->getDatabasePlatform();
-		$schemaReader = new MDB2SchemaReader(\OC::$server->getConfig(), $platform);
-		return $schemaReader->loadSchemaFromFile($file);
-	}
-
-	/**
-	 * update the database scheme
-	 * @param string $file file to read structure from
-	 * @param bool $generateSql only return the sql needed for the upgrade
-	 * @return string|boolean
-	 */
-	public function updateDbFromStructure($file, $generateSql = false) {
-		$toSchema = $this->readSchemaFromFile($file);
-		$migrator = $this->getMigrator();
-
-		if ($generateSql) {
-			return $migrator->generateChangeScript($toSchema);
-		} else {
-			$migrator->migrate($toSchema);
-			return true;
-		}
-	}
-
-	/**
-	 * update the database scheme
-	 * @param string $file file to read structure from
-	 * @return boolean
-	 */
-	public function simulateUpdateDbFromStructure($file) {
-		$toSchema = $this->readSchemaFromFile($file);
-		$this->getMigrator()->checkMigrate($toSchema);
-		return true;
-	}
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Schema $schema
-	 * @return string
-	 */
-	public function generateChangeScript($schema) {
-		$migrator = $this->getMigrator();
-		return $migrator->generateChangeScript($schema);
-	}
-
-	/**
-	 * remove all tables defined in a database structure xml file
-	 *
-	 * @param string $file the xml file describing the tables
-	 */
-	public function removeDBStructure($file) {
-		$schemaReader = new MDB2SchemaReader(\OC::$server->getConfig(), $this->conn->getDatabasePlatform());
-		$fromSchema = $schemaReader->loadSchemaFromFile($file);
-		$toSchema = clone $fromSchema;
-		/** @var $table \Doctrine\DBAL\Schema\Table */
-		foreach ($toSchema->getTables() as $table) {
-			$toSchema->dropTable($table->getName());
-		}
-		$comparator = new \Doctrine\DBAL\Schema\Comparator();
-		$schemaDiff = $comparator->compare($fromSchema, $toSchema);
-		$this->executeSchemaChange($schemaDiff);
-	}
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Schema|\Doctrine\DBAL\Schema\SchemaDiff $schema
-	 * @return bool
-	 */
-	private function executeSchemaChange($schema) {
-		$this->conn->beginTransaction();
-		foreach ($schema->toSql($this->conn->getDatabasePlatform()) as $sql) {
-			$this->conn->query($sql);
-		}
-		$this->conn->commit();
-
-		if ($this->conn->getDatabasePlatform() instanceof SqlitePlatform) {
-			$this->conn->close();
-			$this->conn->connect();
-		}
-		return true;
-	}
-}
diff --git a/lib/private/db/mdb2schemareader.php b/lib/private/db/mdb2schemareader.php
deleted file mode 100644
index 375fec185cb..00000000000
--- a/lib/private/db/mdb2schemareader.php
+++ /dev/null
@@ -1,359 +0,0 @@
-<?php
-/**
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Joas Schilling <nickvergessen@owncloud.com>
- * @author Jörn Friedrich Dreyer <jfd@butonic.de>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Oliver Gasser <oliver.gasser@gmail.com>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Robin McCorkell <robin@mccorkell.me.uk>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- * @author Victor Dubiniuk <dubiniuk@owncloud.com>
- * @author Vincent Petry <pvince81@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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\Platforms\AbstractPlatform;
-use Doctrine\DBAL\Schema\SchemaConfig;
-use OCP\IConfig;
-
-class MDB2SchemaReader {
-	/**
-	 * @var string $DBNAME
-	 */
-	protected $DBNAME;
-
-	/**
-	 * @var string $DBTABLEPREFIX
-	 */
-	protected $DBTABLEPREFIX;
-
-	/**
-	 * @var \Doctrine\DBAL\Platforms\AbstractPlatform $platform
-	 */
-	protected $platform;
-
-	/** @var \Doctrine\DBAL\Schema\SchemaConfig $schemaConfig */
-	protected $schemaConfig;
-
-	/**
-	 * @param \OCP\IConfig $config
-	 * @param \Doctrine\DBAL\Platforms\AbstractPlatform $platform
-	 */
-	public function __construct(IConfig $config, AbstractPlatform $platform) {
-		$this->platform = $platform;
-		$this->DBNAME = $config->getSystemValue('dbname', 'owncloud');
-		$this->DBTABLEPREFIX = $config->getSystemValue('dbtableprefix', 'oc_');
-
-		// Oracle does not support longer index names then 30 characters.
-		// We use this limit for all DBs to make sure it does not cause a
-		// problem.
-		$this->schemaConfig = new SchemaConfig();
-		$this->schemaConfig->setMaxIdentifierLength(30);
-	}
-
-	/**
-	 * @param string $file
-	 * @return \Doctrine\DBAL\Schema\Schema
-	 * @throws \DomainException
-	 */
-	public function loadSchemaFromFile($file) {
-		$schema = new \Doctrine\DBAL\Schema\Schema();
-		$loadEntities = libxml_disable_entity_loader(false);
-		$xml = simplexml_load_file($file);
-		libxml_disable_entity_loader($loadEntities);
-		foreach ($xml->children() as $child) {
-			/**
-			 * @var \SimpleXMLElement $child
-			 */
-			switch ($child->getName()) {
-				case 'name':
-				case 'create':
-				case 'overwrite':
-				case 'charset':
-					break;
-				case 'table':
-					$this->loadTable($schema, $child);
-					break;
-				default:
-					throw new \DomainException('Unknown element: ' . $child->getName());
-
-			}
-		}
-		return $schema;
-	}
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Schema $schema
-	 * @param \SimpleXMLElement $xml
-	 * @throws \DomainException
-	 */
-	private function loadTable($schema, $xml) {
-		$table = null;
-		foreach ($xml->children() as $child) {
-			/**
-			 * @var \SimpleXMLElement $child
-			 */
-			switch ($child->getName()) {
-				case 'name':
-					$name = (string)$child;
-					$name = str_replace('*dbprefix*', $this->DBTABLEPREFIX, $name);
-					$name = $this->platform->quoteIdentifier($name);
-					$table = $schema->createTable($name);
-					$table->addOption('collate', 'utf8_bin');
-					$table->setSchemaConfig($this->schemaConfig);
-					break;
-				case 'create':
-				case 'overwrite':
-				case 'charset':
-					break;
-				case 'declaration':
-					if (is_null($table)) {
-						throw new \DomainException('Table declaration before table name');
-					}
-					$this->loadDeclaration($table, $child);
-					break;
-				default:
-					throw new \DomainException('Unknown element: ' . $child->getName());
-
-			}
-		}
-	}
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Table $table
-	 * @param \SimpleXMLElement $xml
-	 * @throws \DomainException
-	 */
-	private function loadDeclaration($table, $xml) {
-		foreach ($xml->children() as $child) {
-			/**
-			 * @var \SimpleXMLElement $child
-			 */
-			switch ($child->getName()) {
-				case 'field':
-					$this->loadField($table, $child);
-					break;
-				case 'index':
-					$this->loadIndex($table, $child);
-					break;
-				default:
-					throw new \DomainException('Unknown element: ' . $child->getName());
-
-			}
-		}
-	}
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Table $table
-	 * @param \SimpleXMLElement $xml
-	 * @throws \DomainException
-	 */
-	private function loadField($table, $xml) {
-		$options = array( 'notnull' => false );
-		foreach ($xml->children() as $child) {
-			/**
-			 * @var \SimpleXMLElement $child
-			 */
-			switch ($child->getName()) {
-				case 'name':
-					$name = (string)$child;
-					$name = $this->platform->quoteIdentifier($name);
-					break;
-				case 'type':
-					$type = (string)$child;
-					switch ($type) {
-						case 'text':
-							$type = 'string';
-							break;
-						case 'clob':
-							$type = 'text';
-							break;
-						case 'timestamp':
-							$type = 'datetime';
-							break;
-						case 'numeric':
-							$type = 'decimal';
-							break;
-					}
-					break;
-				case 'length':
-					$length = (string)$child;
-					$options['length'] = $length;
-					break;
-				case 'unsigned':
-					$unsigned = $this->asBool($child);
-					$options['unsigned'] = $unsigned;
-					break;
-				case 'notnull':
-					$notnull = $this->asBool($child);
-					$options['notnull'] = $notnull;
-					break;
-				case 'autoincrement':
-					$autoincrement = $this->asBool($child);
-					$options['autoincrement'] = $autoincrement;
-					break;
-				case 'default':
-					$default = (string)$child;
-					$options['default'] = $default;
-					break;
-				case 'comments':
-					$comment = (string)$child;
-					$options['comment'] = $comment;
-					break;
-				case 'primary':
-					$primary = $this->asBool($child);
-					$options['primary'] = $primary;
-					break;
-				case 'precision':
-					$precision = (string)$child;
-					$options['precision'] = $precision;
-					break;
-				case 'scale':
-					$scale = (string)$child;
-					$options['scale'] = $scale;
-					break;
-				default:
-					throw new \DomainException('Unknown element: ' . $child->getName());
-
-			}
-		}
-		if (isset($name) && isset($type)) {
-			if (isset($options['default']) && empty($options['default'])) {
-				if (empty($options['notnull']) || !$options['notnull']) {
-					unset($options['default']);
-					$options['notnull'] = false;
-				} else {
-					$options['default'] = '';
-				}
-				if ($type == 'integer' || $type == 'decimal') {
-					$options['default'] = 0;
-				} elseif ($type == 'boolean') {
-					$options['default'] = false;
-				}
-				if (!empty($options['autoincrement']) && $options['autoincrement']) {
-					unset($options['default']);
-				}
-			}
-			if ($type === 'integer' && isset($options['default'])) {
-				$options['default'] = (int)$options['default'];
-			}
-			if ($type === 'integer' && isset($options['length'])) {
-				$length = $options['length'];
-				if ($length < 4) {
-					$type = 'smallint';
-				} else if ($length > 4) {
-					$type = 'bigint';
-				}
-			}
-			if ($type === 'boolean' && isset($options['default'])) {
-				$options['default'] = $this->asBool($options['default']);
-			}
-			if (!empty($options['autoincrement'])
-				&& !empty($options['notnull'])
-			) {
-				$options['primary'] = true;
-			}
-			$table->addColumn($name, $type, $options);
-			if (!empty($options['primary']) && $options['primary']) {
-				$table->setPrimaryKey(array($name));
-			}
-		}
-	}
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Table $table
-	 * @param \SimpleXMLElement $xml
-	 * @throws \DomainException
-	 */
-	private function loadIndex($table, $xml) {
-		$name = null;
-		$fields = array();
-		foreach ($xml->children() as $child) {
-			/**
-			 * @var \SimpleXMLElement $child
-			 */
-			switch ($child->getName()) {
-				case 'name':
-					$name = (string)$child;
-					break;
-				case 'primary':
-					$primary = $this->asBool($child);
-					break;
-				case 'unique':
-					$unique = $this->asBool($child);
-					break;
-				case 'field':
-					foreach ($child->children() as $field) {
-						/**
-						 * @var \SimpleXMLElement $field
-						 */
-						switch ($field->getName()) {
-							case 'name':
-								$field_name = (string)$field;
-								$field_name = $this->platform->quoteIdentifier($field_name);
-								$fields[] = $field_name;
-								break;
-							case 'sorting':
-								break;
-							default:
-								throw new \DomainException('Unknown element: ' . $field->getName());
-
-						}
-					}
-					break;
-				default:
-					throw new \DomainException('Unknown element: ' . $child->getName());
-
-			}
-		}
-		if (!empty($fields)) {
-			if (isset($primary) && $primary) {
-				if ($table->hasPrimaryKey()) {
-					return;
-				}
-				$table->setPrimaryKey($fields, $name);
-			} else {
-				if (isset($unique) && $unique) {
-					$table->addUniqueIndex($fields, $name);
-				} else {
-					$table->addIndex($fields, $name);
-				}
-			}
-		} else {
-			throw new \DomainException('Empty index definition: ' . $name . ' options:' . print_r($fields, true));
-		}
-	}
-
-	/**
-	 * @param \SimpleXMLElement|string $xml
-	 * @return bool
-	 */
-	private function asBool($xml) {
-		$result = (string)$xml;
-		if ($result == 'true') {
-			$result = true;
-		} elseif ($result == 'false') {
-			$result = false;
-		}
-		return (bool)$result;
-	}
-
-}
diff --git a/lib/private/db/mdb2schemawriter.php b/lib/private/db/mdb2schemawriter.php
deleted file mode 100644
index 7dc3bd223a7..00000000000
--- a/lib/private/db/mdb2schemawriter.php
+++ /dev/null
@@ -1,178 +0,0 @@
-<?php
-/**
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Jörn Friedrich Dreyer <jfd@butonic.de>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author tbelau666 <thomas.belau@gmx.de>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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\Schema\Column;
-use Doctrine\DBAL\Schema\Index;
-
-class MDB2SchemaWriter {
-
-	/**
-	 * @param string $file
-	 * @param \OC\DB\Connection $conn
-	 * @return bool
-	 */
-	static public function saveSchemaToFile($file, \OC\DB\Connection $conn) {
-		$config = \OC::$server->getConfig();
-
-		$xml = new \SimpleXMLElement('<database/>');
-		$xml->addChild('name', $config->getSystemValue('dbname', 'owncloud'));
-		$xml->addChild('create', 'true');
-		$xml->addChild('overwrite', 'false');
-		$xml->addChild('charset', 'utf8');
-
-		// FIX ME: bloody work around
-		if ($config->getSystemValue('dbtype', 'sqlite') === 'oci') {
-			$filterExpression = '/^"' . preg_quote($conn->getPrefix()) . '/';
-		} else {
-			$filterExpression = '/^' . preg_quote($conn->getPrefix()) . '/';
-		}
-		$conn->getConfiguration()->setFilterSchemaAssetsExpression($filterExpression);
-
-		foreach ($conn->getSchemaManager()->listTables() as $table) {
-			self::saveTable($table, $xml->addChild('table'));
-		}
-		file_put_contents($file, $xml->asXML());
-		return true;
-	}
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Table $table
-	 * @param \SimpleXMLElement $xml
-	 */
-	private static function saveTable($table, $xml) {
-		$xml->addChild('name', $table->getName());
-		$declaration = $xml->addChild('declaration');
-		foreach($table->getColumns() as $column) {
-			self::saveColumn($column, $declaration->addChild('field'));
-		}
-		foreach($table->getIndexes() as $index) {
-			if ($index->getName() == 'PRIMARY') {
-				$autoincrement = false;
-				foreach($index->getColumns() as $column) {
-					if ($table->getColumn($column)->getAutoincrement()) {
-						$autoincrement = true;
-					}
-				}
-				if ($autoincrement) {
-					continue;
-				}
-			}
-			self::saveIndex($index, $declaration->addChild('index'));
-		}
-	}
-
-	/**
-	 * @param Column $column
-	 * @param \SimpleXMLElement $xml
-	 */
-	private static function saveColumn($column, $xml) {
-		$xml->addChild('name', $column->getName());
-		switch($column->getType()) {
-			case 'SmallInt':
-			case 'Integer':
-			case 'BigInt':
-				$xml->addChild('type', 'integer');
-				$default = $column->getDefault();
-				if (is_null($default) && $column->getAutoincrement()) {
-					$default = '0';
-				}
-				$xml->addChild('default', $default);
-				$xml->addChild('notnull', self::toBool($column->getNotnull()));
-				if ($column->getAutoincrement()) {
-					$xml->addChild('autoincrement', '1');
-				}
-				if ($column->getUnsigned()) {
-					$xml->addChild('unsigned', 'true');
-				}
-				$length = '4';
-				if ($column->getType() == 'SmallInt') {
-					$length = '2';
-				}
-				elseif ($column->getType() == 'BigInt') {
-					$length = '8';
-				}
-				$xml->addChild('length', $length);
-				break;
-			case 'String':
-				$xml->addChild('type', 'text');
-				$default = trim($column->getDefault());
-				if ($default === '') {
-					$default = false;
-				}
-				$xml->addChild('default', $default);
-				$xml->addChild('notnull', self::toBool($column->getNotnull()));
-				$xml->addChild('length', $column->getLength());
-				break;
-			case 'Text':
-				$xml->addChild('type', 'clob');
-				$xml->addChild('notnull', self::toBool($column->getNotnull()));
-				break;
-			case 'Decimal':
-				$xml->addChild('type', 'decimal');
-				$xml->addChild('default', $column->getDefault());
-				$xml->addChild('notnull', self::toBool($column->getNotnull()));
-				$xml->addChild('length', '15');
-				break;
-			case 'Boolean':
-				$xml->addChild('type', 'integer');
-				$xml->addChild('default', $column->getDefault());
-				$xml->addChild('notnull', self::toBool($column->getNotnull()));
-				$xml->addChild('length', '1');
-				break;
-			case 'DateTime':
-				$xml->addChild('type', 'timestamp');
-				$xml->addChild('default', $column->getDefault());
-				$xml->addChild('notnull', self::toBool($column->getNotnull()));
-				break;
-
-		}
-	}
-
-	/**
-	 * @param Index $index
-	 * @param \SimpleXMLElement $xml
-	 */
-	private static function saveIndex($index, $xml) {
-		$xml->addChild('name', $index->getName());
-		if ($index->isPrimary()) {
-			$xml->addChild('primary', 'true');
-		}
-		elseif ($index->isUnique()) {
-			$xml->addChild('unique', 'true');
-		}
-		foreach($index->getColumns() as $column) {
-			$field = $xml->addChild('field');
-			$field->addChild('name', $column);
-			$field->addChild('sorting', 'ascending');
-			
-		}
-	}
-
-	private static function toBool($bool) {
-		return $bool ? 'true' : 'false';
-	}
-}
diff --git a/lib/private/db/migrationexception.php b/lib/private/db/migrationexception.php
deleted file mode 100644
index 57e4c5b8334..00000000000
--- a/lib/private/db/migrationexception.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-/**
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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;
-
-
-class MigrationException extends \Exception {
-	private $table;
-
-	public function __construct($table, $message) {
-		$this->table = $table;
-		parent::__construct($message);
-	}
-
-	/**
-	 * @return string
-	 */
-	public function getTable() {
-		return $this->table;
-	}
-}
diff --git a/lib/private/db/migrator.php b/lib/private/db/migrator.php
deleted file mode 100644
index 8b8a34d9865..00000000000
--- a/lib/private/db/migrator.php
+++ /dev/null
@@ -1,292 +0,0 @@
-<?php
-/**
- * @author martin-rueegg <martin.rueegg@metaworx.ch>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author tbelau666 <thomas.belau@gmx.de>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- * @author Victor Dubiniuk <dubiniuk@owncloud.com>
- * @author Vincent Petry <pvince81@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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\Schema\Index;
-use \Doctrine\DBAL\Schema\Table;
-use \Doctrine\DBAL\Schema\Schema;
-use \Doctrine\DBAL\Schema\SchemaConfig;
-use \Doctrine\DBAL\Schema\Comparator;
-use OCP\IConfig;
-use OCP\Security\ISecureRandom;
-use Symfony\Component\EventDispatcher\EventDispatcher;
-use Symfony\Component\EventDispatcher\GenericEvent;
-
-class Migrator {
-
-	/**
-	 * @var \Doctrine\DBAL\Connection $connection
-	 */
-	protected $connection;
-
-	/**
-	 * @var ISecureRandom
-	 */
-	private $random;
-
-	/** @var IConfig */
-	protected $config;
-
-	/** @var EventDispatcher  */
-	private $dispatcher;
-
-	/** @var bool */
-	private $noEmit = false;
-
-	/**
-	 * @param \Doctrine\DBAL\Connection|Connection $connection
-	 * @param ISecureRandom $random
-	 * @param IConfig $config
-	 * @param EventDispatcher $dispatcher
-	 */
-	public function __construct(\Doctrine\DBAL\Connection $connection,
-								ISecureRandom $random,
-								IConfig $config,
-								EventDispatcher $dispatcher = null) {
-		$this->connection = $connection;
-		$this->random = $random;
-		$this->config = $config;
-		$this->dispatcher = $dispatcher;
-	}
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Schema $targetSchema
-	 */
-	public function migrate(Schema $targetSchema) {
-		$this->noEmit = true;
-		$this->applySchema($targetSchema);
-	}
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Schema $targetSchema
-	 * @return string
-	 */
-	public function generateChangeScript(Schema $targetSchema) {
-		$schemaDiff = $this->getDiff($targetSchema, $this->connection);
-
-		$script = '';
-		$sqls = $schemaDiff->toSql($this->connection->getDatabasePlatform());
-		foreach ($sqls as $sql) {
-			$script .= $this->convertStatementToScript($sql);
-		}
-
-		return $script;
-	}
-
-	/**
-	 * @param Schema $targetSchema
-	 * @throws \OC\DB\MigrationException
-	 */
-	public function checkMigrate(Schema $targetSchema) {
-		$this->noEmit = true;
-		/**@var \Doctrine\DBAL\Schema\Table[] $tables */
-		$tables = $targetSchema->getTables();
-		$filterExpression = $this->getFilterExpression();
-		$this->connection->getConfiguration()->
-			setFilterSchemaAssetsExpression($filterExpression);
-		$existingTables = $this->connection->getSchemaManager()->listTableNames();
-
-		$step = 0;
-		foreach ($tables as $table) {
-			if (strpos($table->getName(), '.')) {
-				list(, $tableName) = explode('.', $table->getName());
-			} else {
-				$tableName = $table->getName();
-			}
-			$this->emitCheckStep($tableName, $step++, count($tables));
-			// don't need to check for new tables
-			if (array_search($tableName, $existingTables) !== false) {
-				$this->checkTableMigrate($table);
-			}
-		}
-	}
-
-	/**
-	 * Create a unique name for the temporary table
-	 *
-	 * @param string $name
-	 * @return string
-	 */
-	protected function generateTemporaryTableName($name) {
-		return $this->config->getSystemValue('dbtableprefix', 'oc_') . $name . '_' . $this->random->generate(13, ISecureRandom::CHAR_LOWER . ISecureRandom::CHAR_DIGITS);
-	}
-
-	/**
-	 * Check the migration of a table on a copy so we can detect errors before messing with the real table
-	 *
-	 * @param \Doctrine\DBAL\Schema\Table $table
-	 * @throws \OC\DB\MigrationException
-	 */
-	protected function checkTableMigrate(Table $table) {
-		$name = $table->getName();
-		$tmpName = $this->generateTemporaryTableName($name);
-
-		$this->copyTable($name, $tmpName);
-
-		//create the migration schema for the temporary table
-		$tmpTable = $this->renameTableSchema($table, $tmpName);
-		$schemaConfig = new SchemaConfig();
-		$schemaConfig->setName($this->connection->getDatabase());
-		$schema = new Schema(array($tmpTable), array(), $schemaConfig);
-
-		try {
-			$this->applySchema($schema);
-			$this->dropTable($tmpName);
-		} catch (DBALException $e) {
-			// pgsql needs to commit it's failed transaction before doing anything else
-			if ($this->connection->isTransactionActive()) {
-				$this->connection->commit();
-			}
-			$this->dropTable($tmpName);
-			throw new MigrationException($table->getName(), $e->getMessage());
-		}
-	}
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Table $table
-	 * @param string $newName
-	 * @return \Doctrine\DBAL\Schema\Table
-	 */
-	protected function renameTableSchema(Table $table, $newName) {
-		/**
-		 * @var \Doctrine\DBAL\Schema\Index[] $indexes
-		 */
-		$indexes = $table->getIndexes();
-		$newIndexes = array();
-		foreach ($indexes as $index) {
-			if ($index->isPrimary()) {
-				// do not rename primary key
-				$indexName = $index->getName();
-			} else {
-				// avoid conflicts in index names
-				$indexName = $this->config->getSystemValue('dbtableprefix', 'oc_') . $this->random->generate(13, ISecureRandom::CHAR_LOWER);
-			}
-			$newIndexes[] = new Index($indexName, $index->getColumns(), $index->isUnique(), $index->isPrimary());
-		}
-
-		// foreign keys are not supported so we just set it to an empty array
-		return new Table($newName, $table->getColumns(), $newIndexes, array(), 0, $table->getOptions());
-	}
-
-	protected function getDiff(Schema $targetSchema, \Doctrine\DBAL\Connection $connection) {
-		$filterExpression = $this->getFilterExpression();
-		$this->connection->getConfiguration()->
-		setFilterSchemaAssetsExpression($filterExpression);
-		$sourceSchema = $connection->getSchemaManager()->createSchema();
-
-		// remove tables we don't know about
-		/** @var $table \Doctrine\DBAL\Schema\Table */
-		foreach ($sourceSchema->getTables() as $table) {
-			if (!$targetSchema->hasTable($table->getName())) {
-				$sourceSchema->dropTable($table->getName());
-			}
-		}
-		// remove sequences we don't know about
-		foreach ($sourceSchema->getSequences() as $table) {
-			if (!$targetSchema->hasSequence($table->getName())) {
-				$sourceSchema->dropSequence($table->getName());
-			}
-		}
-
-		$comparator = new Comparator();
-		return $comparator->compare($sourceSchema, $targetSchema);
-	}
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Schema $targetSchema
-	 * @param \Doctrine\DBAL\Connection $connection
-	 */
-	protected function applySchema(Schema $targetSchema, \Doctrine\DBAL\Connection $connection = null) {
-		if (is_null($connection)) {
-			$connection = $this->connection;
-		}
-
-		$schemaDiff = $this->getDiff($targetSchema, $connection);
-
-		$connection->beginTransaction();
-		$sqls = $schemaDiff->toSql($connection->getDatabasePlatform());
-		$step = 0;
-		foreach ($sqls as $sql) {
-			$this->emit($sql, $step++, count($sqls));
-			$connection->query($sql);
-		}
-		$connection->commit();
-	}
-
-	/**
-	 * @param string $sourceName
-	 * @param string $targetName
-	 */
-	protected function copyTable($sourceName, $targetName) {
-		$quotedSource = $this->connection->quoteIdentifier($sourceName);
-		$quotedTarget = $this->connection->quoteIdentifier($targetName);
-
-		$this->connection->exec('CREATE TABLE ' . $quotedTarget . ' (LIKE ' . $quotedSource . ')');
-		$this->connection->exec('INSERT INTO ' . $quotedTarget . ' SELECT * FROM ' . $quotedSource);
-	}
-
-	/**
-	 * @param string $name
-	 */
-	protected function dropTable($name) {
-		$this->connection->exec('DROP TABLE ' . $this->connection->quoteIdentifier($name));
-	}
-
-	/**
-	 * @param $statement
-	 * @return string
-	 */
-	protected function convertStatementToScript($statement) {
-		$script = $statement . ';';
-		$script .= PHP_EOL;
-		$script .= PHP_EOL;
-		return $script;
-	}
-
-	protected function getFilterExpression() {
-		return '/^' . preg_quote($this->config->getSystemValue('dbtableprefix', 'oc_')) . '/';
-	}
-
-	protected function emit($sql, $step, $max) {
-		if ($this->noEmit) {
-			return;
-		}
-		if(is_null($this->dispatcher)) {
-			return;
-		}
-		$this->dispatcher->dispatch('\OC\DB\Migrator::executeSql', new GenericEvent($sql, [$step+1, $max]));
-	}
-
-	private function emitCheckStep($tableName, $step, $max) {
-		if(is_null($this->dispatcher)) {
-			return;
-		}
-		$this->dispatcher->dispatch('\OC\DB\Migrator::checkTable', new GenericEvent($tableName, [$step+1, $max]));
-	}
-}
diff --git a/lib/private/db/mysqlmigrator.php b/lib/private/db/mysqlmigrator.php
deleted file mode 100644
index 1b3f70a817d..00000000000
--- a/lib/private/db/mysqlmigrator.php
+++ /dev/null
@@ -1,51 +0,0 @@
-<?php
-/**
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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\Schema\Schema;
-
-class MySQLMigrator extends Migrator {
-	/**
-	 * @param Schema $targetSchema
-	 * @param \Doctrine\DBAL\Connection $connection
-	 * @return \Doctrine\DBAL\Schema\SchemaDiff
-	 */
-	protected function getDiff(Schema $targetSchema, \Doctrine\DBAL\Connection $connection) {
-		$platform = $connection->getDatabasePlatform();
-		$platform->registerDoctrineTypeMapping('enum', 'string');
-		$platform->registerDoctrineTypeMapping('bit', 'string');
-
-		$schemaDiff = parent::getDiff($targetSchema, $connection);
-
-		// identifiers need to be quoted for mysql
-		foreach ($schemaDiff->changedTables as $tableDiff) {
-			$tableDiff->name = $this->connection->quoteIdentifier($tableDiff->name);
-			foreach ($tableDiff->changedColumns as $column) {
-				$column->oldColumnName = $this->connection->quoteIdentifier($column->oldColumnName);
-			}
-		}
-
-		return $schemaDiff;
-	}
-}
diff --git a/lib/private/db/nocheckmigrator.php b/lib/private/db/nocheckmigrator.php
deleted file mode 100644
index 23afae11816..00000000000
--- a/lib/private/db/nocheckmigrator.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-/**
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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\Schema\Schema;
-
-/**
- * migrator for database platforms that don't support the upgrade check
- *
- * @package OC\DB
- */
-class NoCheckMigrator extends Migrator {
-	/**
-	 * @param \Doctrine\DBAL\Schema\Schema $targetSchema
-	 * @throws \OC\DB\MigrationException
-	 */
-	public function checkMigrate(Schema $targetSchema) {}
-}
diff --git a/lib/private/db/ocsqliteplatform.php b/lib/private/db/ocsqliteplatform.php
deleted file mode 100644
index fe68bc3cc91..00000000000
--- a/lib/private/db/ocsqliteplatform.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-/**
- * @author Robin Appelman <icewind@owncloud.com>
- *
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License, version 3,
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *
- */
-
-namespace OC\DB;
-
-class OCSqlitePlatform extends \Doctrine\DBAL\Platforms\SqlitePlatform {
-	/**
-	 * {@inheritDoc}
-	 */
-	public function getColumnDeclarationSQL($name, array $field) {
-		$def = parent::getColumnDeclarationSQL($name, $field);
-		if (!empty($field['autoincrement'])) {
-			$def .= ' PRIMARY KEY AUTOINCREMENT';
-		}
-		return $def;
-	}
-
-	/**
-	 * {@inheritDoc}
-	 */
-	protected function _getCreateTableSQL($name, array $columns, array $options = array()){
-		// if auto increment is set the column is already defined as primary key
-		foreach ($columns as $column) {
-			if (!empty($column['autoincrement'])) {
-				$options['primary'] = null;
-			}
-		}
-		return parent::_getCreateTableSQL($name, $columns, $options);
-	}
-}
diff --git a/lib/private/db/oracleconnection.php b/lib/private/db/oracleconnection.php
deleted file mode 100644
index a95f37a8e6c..00000000000
--- a/lib/private/db/oracleconnection.php
+++ /dev/null
@@ -1,93 +0,0 @@
-<?php
-/**
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Lukas Reschke <lukas@owncloud.com>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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;
-
-class OracleConnection extends Connection {
-	/**
-	 * Quote the keys of the array
-	 */
-	private function quoteKeys(array $data) {
-		$return = array();
-		foreach($data as $key => $value) {
-			$return[$this->quoteIdentifier($key)] = $value;
-		}
-		return $return;
-	}
-
-	/**
-	 * {@inheritDoc}
-	 */
-	public function insert($tableName, array $data, array $types = array()) {
-		$tableName = $this->quoteIdentifier($tableName);
-		$data = $this->quoteKeys($data);
-		return parent::insert($tableName, $data, $types);
-	}
-
-	/**
-	 * {@inheritDoc}
-	 */
-	public function update($tableName, array $data, array $identifier, array $types = array()) {
-		$tableName = $this->quoteIdentifier($tableName);
-		$data = $this->quoteKeys($data);
-		$identifier = $this->quoteKeys($identifier);
-		return parent::update($tableName, $data, $identifier, $types);
-	}
-
-	/**
-	 * {@inheritDoc}
-	 */
-	public function delete($tableExpression, array $identifier, array $types = array()) {
-		$tableName = $this->quoteIdentifier($tableExpression);
-		$identifier = $this->quoteKeys($identifier);
-		return parent::delete($tableName, $identifier);
-	}
-
-	/**
-	 * 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);
-		$table = $this->quoteIdentifier($table);
-		$schema = $this->getSchemaManager();
-		if($schema->tablesExist(array($table))) {
-			$schema->dropTable($table);
-		}
-	}
-
-	/**
-	 * Check if a table exists
-	 *
-	 * @param string $table table name without the prefix
-	 * @return bool
-	 */
-	public function tableExists($table){
-		$table = $this->tablePrefix . trim($table);
-		$table = $this->quoteIdentifier($table);
-		$schema = $this->getSchemaManager();
-		return $schema->tablesExist(array($table));
-	}
-}
diff --git a/lib/private/db/oraclemigrator.php b/lib/private/db/oraclemigrator.php
deleted file mode 100644
index ceb89cf64d4..00000000000
--- a/lib/private/db/oraclemigrator.php
+++ /dev/null
@@ -1,74 +0,0 @@
-<?php
-/**
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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\Schema\Schema;
-
-class OracleMigrator extends NoCheckMigrator {
-	/**
-	 * @param Schema $targetSchema
-	 * @param \Doctrine\DBAL\Connection $connection
-	 * @return \Doctrine\DBAL\Schema\SchemaDiff
-	 */
-	protected function getDiff(Schema $targetSchema, \Doctrine\DBAL\Connection $connection) {
-		$schemaDiff = parent::getDiff($targetSchema, $connection);
-
-		// oracle forces us to quote the identifiers
-		foreach ($schemaDiff->changedTables as $tableDiff) {
-			$tableDiff->name = $this->connection->quoteIdentifier($tableDiff->name);
-			foreach ($tableDiff->changedColumns as $column) {
-				$column->oldColumnName = $this->connection->quoteIdentifier($column->oldColumnName);
-			}
-		}
-
-		return $schemaDiff;
-	}
-
-	/**
-	 * @param string $name
-	 * @return string
-	 */
-	protected function generateTemporaryTableName($name) {
-		return 'oc_' . uniqid();
-	}
-
-	/**
-	 * @param $statement
-	 * @return string
-	 */
-	protected function convertStatementToScript($statement) {
-		if (substr($statement, -1) === ';') {
-			return $statement . PHP_EOL . '/' . PHP_EOL;
-		}
-		$script = $statement . ';';
-		$script .= PHP_EOL;
-		$script .= PHP_EOL;
-		return $script;
-	}
-
-	protected function getFilterExpression() {
-		return '/^"' . preg_quote($this->config->getSystemValue('dbtableprefix', 'oc_')) . '/';
-	}
-
-}
diff --git a/lib/private/db/pgsqltools.php b/lib/private/db/pgsqltools.php
deleted file mode 100644
index e9e507551e6..00000000000
--- a/lib/private/db/pgsqltools.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php
-/**
- * @author Andreas Fischer <bantu@owncloud.com>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author tbelau666 <thomas.belau@gmx.de>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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 OCP\IConfig;
-
-/**
-* Various PostgreSQL specific helper functions.
-*/
-class PgSqlTools {
-
-	/** @var \OCP\IConfig */
-	private $config;
-
-	/**
-	 * @param \OCP\IConfig $config
-	 */
-	public function __construct(IConfig $config) {
-		$this->config = $config;
-	}
-
-	/**
-	* @brief Resynchronizes all sequences of a database after using INSERTs
-	*        without leaving out the auto-incremented column.
-	* @param \OC\DB\Connection $conn
-	* @return null
-	*/
-	public function resynchronizeDatabaseSequences(Connection $conn) {
-		$filterExpression = '/^' . preg_quote($this->config->getSystemValue('dbtableprefix', 'oc_')) . '/';
-		$databaseName = $conn->getDatabase();
-		$conn->getConfiguration()->setFilterSchemaAssetsExpression($filterExpression);
-
-		foreach ($conn->getSchemaManager()->listSequences() as $sequence) {
-			$sequenceName = $sequence->getName();
-			$sqlInfo = 'SELECT table_schema, table_name, column_name
-				FROM information_schema.columns
-				WHERE column_default = ? AND table_catalog = ?';
-			$sequenceInfo = $conn->fetchAssoc($sqlInfo, array(
-				"nextval('$sequenceName'::regclass)",
-				$databaseName
-			));
-			$tableName = $sequenceInfo['table_name'];
-			$columnName = $sequenceInfo['column_name'];
-			$sqlMaxId = "SELECT MAX($columnName) FROM $tableName";
-			$sqlSetval = "SELECT setval('$sequenceName', ($sqlMaxId))";
-			$conn->executeQuery($sqlSetval);
-		}
-	}
-}
diff --git a/lib/private/db/querybuilder/compositeexpression.php b/lib/private/db/querybuilder/compositeexpression.php
deleted file mode 100644
index 927dfe38378..00000000000
--- a/lib/private/db/querybuilder/compositeexpression.php
+++ /dev/null
@@ -1,92 +0,0 @@
-<?php
-/**
- * @author Joas Schilling <nickvergessen@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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\QueryBuilder;
-
-use OCP\DB\QueryBuilder\ICompositeExpression;
-
-class CompositeExpression implements ICompositeExpression, \Countable {
-	/** @var \Doctrine\DBAL\Query\Expression\CompositeExpression */
-	protected $compositeExpression;
-
-	/**
-	 * Constructor.
-	 *
-	 * @param \Doctrine\DBAL\Query\Expression\CompositeExpression $compositeExpression
-	 */
-	public function __construct(\Doctrine\DBAL\Query\Expression\CompositeExpression $compositeExpression) {
-		$this->compositeExpression = $compositeExpression;
-	}
-
-	/**
-	 * Adds multiple parts to composite expression.
-	 *
-	 * @param array $parts
-	 *
-	 * @return \OCP\DB\QueryBuilder\ICompositeExpression
-	 */
-	public function addMultiple(array $parts = array()) {
-		$this->compositeExpression->addMultiple($parts);
-
-		return $this;
-	}
-
-	/**
-	 * Adds an expression to composite expression.
-	 *
-	 * @param mixed $part
-	 *
-	 * @return \OCP\DB\QueryBuilder\ICompositeExpression
-	 */
-	public function add($part) {
-		$this->compositeExpression->add($part);
-
-		return $this;
-	}
-
-	/**
-	 * Retrieves the amount of expressions on composite expression.
-	 *
-	 * @return integer
-	 */
-	public function count() {
-		return $this->compositeExpression->count();
-	}
-
-	/**
-	 * Returns the type of this composite expression (AND/OR).
-	 *
-	 * @return string
-	 */
-	public function getType() {
-		return $this->compositeExpression->getType();
-	}
-
-	/**
-	 * Retrieves the string representation of this composite expression.
-	 *
-	 * @return string
-	 */
-	public function __toString()
-	{
-		return (string) $this->compositeExpression;
-	}
-}
diff --git a/lib/private/db/querybuilder/expressionbuilder/expressionbuilder.php b/lib/private/db/querybuilder/expressionbuilder/expressionbuilder.php
deleted file mode 100644
index ce98816c42d..00000000000
--- a/lib/private/db/querybuilder/expressionbuilder/expressionbuilder.php
+++ /dev/null
@@ -1,370 +0,0 @@
-<?php
-/**
- * @author Joas Schilling <nickvergessen@owncloud.com>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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\QueryBuilder\ExpressionBuilder;
-
-use Doctrine\DBAL\Query\Expression\ExpressionBuilder as DoctrineExpressionBuilder;
-use OC\DB\QueryBuilder\CompositeExpression;
-use OC\DB\QueryBuilder\Literal;
-use OC\DB\QueryBuilder\QueryFunction;
-use OC\DB\QueryBuilder\QuoteHelper;
-use OCP\DB\QueryBuilder\IExpressionBuilder;
-use OCP\IDBConnection;
-
-class ExpressionBuilder implements IExpressionBuilder {
-	/** @var \Doctrine\DBAL\Query\Expression\ExpressionBuilder */
-	protected $expressionBuilder;
-
-	/** @var QuoteHelper */
-	protected $helper;
-
-	/**
-	 * Initializes a new <tt>ExpressionBuilder</tt>.
-	 *
-	 * @param \OCP\IDBConnection $connection
-	 */
-	public function __construct(IDBConnection $connection) {
-		$this->helper = new QuoteHelper();
-		$this->expressionBuilder = new DoctrineExpressionBuilder($connection);
-	}
-
-	/**
-	 * Creates a conjunction of the given boolean expressions.
-	 *
-	 * Example:
-	 *
-	 *     [php]
-	 *     // (u.type = ?) AND (u.role = ?)
-	 *     $expr->andX('u.type = ?', 'u.role = ?'));
-	 *
-	 * @param mixed $x Optional clause. Defaults = null, but requires
-	 *                 at least one defined when converting to string.
-	 *
-	 * @return \OCP\DB\QueryBuilder\ICompositeExpression
-	 */
-	public function andX($x = null) {
-		$arguments = func_get_args();
-		$compositeExpression = call_user_func_array([$this->expressionBuilder, 'andX'], $arguments);
-		return new CompositeExpression($compositeExpression);
-	}
-
-	/**
-	 * Creates a disjunction of the given boolean expressions.
-	 *
-	 * Example:
-	 *
-	 *     [php]
-	 *     // (u.type = ?) OR (u.role = ?)
-	 *     $qb->where($qb->expr()->orX('u.type = ?', 'u.role = ?'));
-	 *
-	 * @param mixed $x Optional clause. Defaults = null, but requires
-	 *                 at least one defined when converting to string.
-	 *
-	 * @return \OCP\DB\QueryBuilder\ICompositeExpression
-	 */
-	public function orX($x = null) {
-		$arguments = func_get_args();
-		$compositeExpression = call_user_func_array([$this->expressionBuilder, 'orX'], $arguments);
-		return new CompositeExpression($compositeExpression);
-	}
-
-	/**
-	 * Creates a comparison expression.
-	 *
-	 * @param mixed $x The left expression.
-	 * @param string $operator One of the IExpressionBuilder::* constants.
-	 * @param mixed $y The right expression.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 */
-	public function comparison($x, $operator, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->comparison($x, $operator, $y);
-	}
-
-	/**
-	 * Creates an equality comparison expression with the given arguments.
-	 *
-	 * First argument is considered the left expression and the second is the right expression.
-	 * When converted to string, it will generated a <left expr> = <right expr>. Example:
-	 *
-	 *     [php]
-	 *     // u.id = ?
-	 *     $expr->eq('u.id', '?');
-	 *
-	 * @param mixed $x The left expression.
-	 * @param mixed $y The right expression.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 */
-	public function eq($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->eq($x, $y);
-	}
-
-	/**
-	 * Creates a non equality comparison expression with the given arguments.
-	 * First argument is considered the left expression and the second is the right expression.
-	 * When converted to string, it will generated a <left expr> <> <right expr>. Example:
-	 *
-	 *     [php]
-	 *     // u.id <> 1
-	 *     $q->where($q->expr()->neq('u.id', '1'));
-	 *
-	 * @param mixed $x The left expression.
-	 * @param mixed $y The right expression.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 */
-	public function neq($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->neq($x, $y);
-	}
-
-	/**
-	 * Creates a lower-than comparison expression with the given arguments.
-	 * First argument is considered the left expression and the second is the right expression.
-	 * When converted to string, it will generated a <left expr> < <right expr>. Example:
-	 *
-	 *     [php]
-	 *     // u.id < ?
-	 *     $q->where($q->expr()->lt('u.id', '?'));
-	 *
-	 * @param mixed $x The left expression.
-	 * @param mixed $y The right expression.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 */
-	public function lt($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->lt($x, $y);
-	}
-
-	/**
-	 * Creates a lower-than-equal comparison expression with the given arguments.
-	 * First argument is considered the left expression and the second is the right expression.
-	 * When converted to string, it will generated a <left expr> <= <right expr>. Example:
-	 *
-	 *     [php]
-	 *     // u.id <= ?
-	 *     $q->where($q->expr()->lte('u.id', '?'));
-	 *
-	 * @param mixed $x The left expression.
-	 * @param mixed $y The right expression.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 */
-	public function lte($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->lte($x, $y);
-	}
-
-	/**
-	 * Creates a greater-than comparison expression with the given arguments.
-	 * First argument is considered the left expression and the second is the right expression.
-	 * When converted to string, it will generated a <left expr> > <right expr>. Example:
-	 *
-	 *     [php]
-	 *     // u.id > ?
-	 *     $q->where($q->expr()->gt('u.id', '?'));
-	 *
-	 * @param mixed $x The left expression.
-	 * @param mixed $y The right expression.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 */
-	public function gt($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->gt($x, $y);
-	}
-
-	/**
-	 * Creates a greater-than-equal comparison expression with the given arguments.
-	 * First argument is considered the left expression and the second is the right expression.
-	 * When converted to string, it will generated a <left expr> >= <right expr>. Example:
-	 *
-	 *     [php]
-	 *     // u.id >= ?
-	 *     $q->where($q->expr()->gte('u.id', '?'));
-	 *
-	 * @param mixed $x The left expression.
-	 * @param mixed $y The right expression.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 */
-	public function gte($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->gte($x, $y);
-	}
-
-	/**
-	 * Creates an IS NULL expression with the given arguments.
-	 *
-	 * @param string $x The field in string format to be restricted by IS NULL.
-	 *
-	 * @return string
-	 */
-	public function isNull($x) {
-		$x = $this->helper->quoteColumnName($x);
-		return $this->expressionBuilder->isNull($x);
-	}
-
-	/**
-	 * Creates an IS NOT NULL expression with the given arguments.
-	 *
-	 * @param string $x The field in string format to be restricted by IS NOT NULL.
-	 *
-	 * @return string
-	 */
-	public function isNotNull($x) {
-		$x = $this->helper->quoteColumnName($x);
-		return $this->expressionBuilder->isNotNull($x);
-	}
-
-	/**
-	 * Creates a LIKE() comparison expression with the given arguments.
-	 *
-	 * @param string $x Field in string format to be inspected by LIKE() comparison.
-	 * @param mixed $y Argument to be used in LIKE() comparison.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 */
-	public function like($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->like($x, $y);
-	}
-
-	/**
-	 * Creates a ILIKE() comparison expression with the given arguments.
-	 *
-	 * @param string $x Field in string format to be inspected by ILIKE() comparison.
-	 * @param mixed $y Argument to be used in ILIKE() comparison.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 * @since 9.0.0
-	 */
-	public function iLike($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->comparison("LOWER($x)", 'LIKE', "LOWER($y)");
-	}
-
-	/**
-	 * Creates a NOT LIKE() comparison expression with the given arguments.
-	 *
-	 * @param string $x Field in string format to be inspected by NOT LIKE() comparison.
-	 * @param mixed $y Argument to be used in NOT LIKE() comparison.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 */
-	public function notLike($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->notLike($x, $y);
-	}
-
-	/**
-	 * Creates a IN () comparison expression with the given arguments.
-	 *
-	 * @param string $x The field in string format to be inspected by IN() comparison.
-	 * @param string|array $y The placeholder or the array of values to be used by IN() comparison.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 */
-	public function in($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnNames($y);
-		return $this->expressionBuilder->in($x, $y);
-	}
-
-	/**
-	 * Creates a NOT IN () comparison expression with the given arguments.
-	 *
-	 * @param string $x The field in string format to be inspected by NOT IN() comparison.
-	 * @param string|array $y The placeholder or the array of values to be used by NOT IN() comparison.
-	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
-	 *                  required when comparing text fields for oci compatibility
-	 *
-	 * @return string
-	 */
-	public function notIn($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnNames($y);
-		return $this->expressionBuilder->notIn($x, $y);
-	}
-
-	/**
-	 * Quotes a given input parameter.
-	 *
-	 * @param mixed $input The parameter to be quoted.
-	 * @param mixed|null $type One of the IQueryBuilder::PARAM_* constants
-	 *
-	 * @return Literal
-	 */
-	public function literal($input, $type = null) {
-		return new Literal($this->expressionBuilder->literal($input, $type));
-	}
-
-	/**
-	 * Returns a IQueryFunction that casts the column to the given type
-	 *
-	 * @param string $column
-	 * @param mixed $type One of IQueryBuilder::PARAM_*
-	 * @return string
-	 */
-	public function castColumn($column, $type) {
-		return new QueryFunction(
-			$this->helper->quoteColumnName($column)
-		);
-	}
-}
diff --git a/lib/private/db/querybuilder/expressionbuilder/mysqlexpressionbuilder.php b/lib/private/db/querybuilder/expressionbuilder/mysqlexpressionbuilder.php
deleted file mode 100644
index 0d34787d26a..00000000000
--- a/lib/private/db/querybuilder/expressionbuilder/mysqlexpressionbuilder.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-/**
- * @author Joas Schilling <nickvergessen@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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\QueryBuilder\ExpressionBuilder;
-
-
-use OC\DB\QueryBuilder\QueryFunction;
-use OCP\DB\QueryBuilder\IQueryBuilder;
-
-class MySqlExpressionBuilder extends ExpressionBuilder {
-
-	/**
-	 * @inheritdoc
-	 */
-	public function iLike($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->comparison($x, ' COLLATE utf8_general_ci LIKE', $y);
-	}
-
-}
diff --git a/lib/private/db/querybuilder/expressionbuilder/ociexpressionbuilder.php b/lib/private/db/querybuilder/expressionbuilder/ociexpressionbuilder.php
deleted file mode 100644
index 5d615ae52e8..00000000000
--- a/lib/private/db/querybuilder/expressionbuilder/ociexpressionbuilder.php
+++ /dev/null
@@ -1,163 +0,0 @@
-<?php
-/**
- * @author Joas Schilling <nickvergessen@owncloud.com>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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\QueryBuilder\ExpressionBuilder;
-
-
-use OC\DB\QueryBuilder\QueryFunction;
-use OCP\DB\QueryBuilder\ILiteral;
-use OCP\DB\QueryBuilder\IParameter;
-use OCP\DB\QueryBuilder\IQueryBuilder;
-use OCP\DB\QueryBuilder\IQueryFunction;
-
-class OCIExpressionBuilder extends ExpressionBuilder {
-
-	/**
-	 * @param mixed $column
-	 * @param mixed|null $type
-	 * @return array|IQueryFunction|string
-	 */
-	protected function prepareColumn($column, $type) {
-		if ($type === IQueryBuilder::PARAM_STR && !is_array($column) && !($column instanceof IParameter) && !($column instanceof ILiteral)) {
-			$column = $this->castColumn($column, $type);
-		} else {
-			$column = $this->helper->quoteColumnNames($column);
-		}
-		return $column;
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function comparison($x, $operator, $y, $type = null) {
-		$x = $this->prepareColumn($x, $type);
-		$y = $this->prepareColumn($y, $type);
-
-		return $this->expressionBuilder->comparison($x, $operator, $y);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function eq($x, $y, $type = null) {
-		$x = $this->prepareColumn($x, $type);
-		$y = $this->prepareColumn($y, $type);
-
-		return $this->expressionBuilder->eq($x, $y);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function neq($x, $y, $type = null) {
-		$x = $this->prepareColumn($x, $type);
-		$y = $this->prepareColumn($y, $type);
-
-		return $this->expressionBuilder->neq($x, $y);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function lt($x, $y, $type = null) {
-		$x = $this->prepareColumn($x, $type);
-		$y = $this->prepareColumn($y, $type);
-
-		return $this->expressionBuilder->lt($x, $y);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function lte($x, $y, $type = null) {
-		$x = $this->prepareColumn($x, $type);
-		$y = $this->prepareColumn($y, $type);
-
-		return $this->expressionBuilder->lte($x, $y);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function gt($x, $y, $type = null) {
-		$x = $this->prepareColumn($x, $type);
-		$y = $this->prepareColumn($y, $type);
-
-		return $this->expressionBuilder->gt($x, $y);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function gte($x, $y, $type = null) {
-		$x = $this->prepareColumn($x, $type);
-		$y = $this->prepareColumn($y, $type);
-
-		return $this->expressionBuilder->gte($x, $y);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function in($x, $y, $type = null) {
-		$x = $this->prepareColumn($x, $type);
-		$y = $this->prepareColumn($y, $type);
-
-		return $this->expressionBuilder->in($x, $y);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function notIn($x, $y, $type = null) {
-		$x = $this->prepareColumn($x, $type);
-		$y = $this->prepareColumn($y, $type);
-
-		return $this->expressionBuilder->notIn($x, $y);
-	}
-
-	/**
-	 * Returns a IQueryFunction that casts the column to the given type
-	 *
-	 * @param string $column
-	 * @param mixed $type One of IQueryBuilder::PARAM_*
-	 * @return IQueryFunction
-	 */
-	public function castColumn($column, $type) {
-		if ($type === IQueryBuilder::PARAM_STR) {
-			$column = $this->helper->quoteColumnName($column);
-			return new QueryFunction('to_char(' . $column . ')');
-		}
-
-		return parent::castColumn($column, $type);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function iLike($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return new QueryFunction('REGEXP_LIKE('.$x.', \'^\' || REPLACE('.$y.', \'%\', \'.*\') || \'$\', \'i\')');
-	}
-}
diff --git a/lib/private/db/querybuilder/expressionbuilder/pgsqlexpressionbuilder.php b/lib/private/db/querybuilder/expressionbuilder/pgsqlexpressionbuilder.php
deleted file mode 100644
index a8f1af87a45..00000000000
--- a/lib/private/db/querybuilder/expressionbuilder/pgsqlexpressionbuilder.php
+++ /dev/null
@@ -1,56 +0,0 @@
-<?php
-/**
- * @author Joas Schilling <nickvergessen@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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\QueryBuilder\ExpressionBuilder;
-
-
-use OC\DB\QueryBuilder\QueryFunction;
-use OCP\DB\QueryBuilder\IQueryBuilder;
-
-class PgSqlExpressionBuilder extends ExpressionBuilder {
-
-	/**
-	 * Returns a IQueryFunction that casts the column to the given type
-	 *
-	 * @param string $column
-	 * @param mixed $type One of IQueryBuilder::PARAM_*
-	 * @return string
-	 */
-	public function castColumn($column, $type) {
-		if ($type === IQueryBuilder::PARAM_INT) {
-			$column = $this->helper->quoteColumnName($column);
-			return new QueryFunction('CAST(' . $column . ' AS INT)');
-		}
-
-		return parent::castColumn($column, $type);
-	}
-
-	/**
-	 * @inheritdoc
-	 */
-	public function iLike($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return $this->expressionBuilder->comparison($x, 'ILIKE', $y);
-	}
-
-}
diff --git a/lib/private/db/querybuilder/literal.php b/lib/private/db/querybuilder/literal.php
deleted file mode 100644
index 0cc96ab48b4..00000000000
--- a/lib/private/db/querybuilder/literal.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-/**
- * @author Joas Schilling <nickvergessen@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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\QueryBuilder;
-
-use OCP\DB\QueryBuilder\ILiteral;
-
-class Literal implements ILiteral{
-	/** @var mixed */
-	protected $literal;
-
-	public function __construct($literal) {
-		$this->literal = $literal;
-	}
-
-	/**
-	 * @return string
-	 */
-	public function __toString() {
-		return (string) $this->literal;
-	}
-}
diff --git a/lib/private/db/querybuilder/parameter.php b/lib/private/db/querybuilder/parameter.php
deleted file mode 100644
index 1c233c83f1d..00000000000
--- a/lib/private/db/querybuilder/parameter.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-/**
- * @author Joas Schilling <nickvergessen@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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\QueryBuilder;
-
-use OCP\DB\QueryBuilder\IParameter;
-
-class Parameter implements IParameter {
-	/** @var mixed */
-	protected $name;
-
-	public function __construct($name) {
-		$this->name = $name;
-	}
-
-	/**
-	 * @return string
-	 */
-	public function __toString() {
-		return (string) $this->name;
-	}
-}
diff --git a/lib/private/db/querybuilder/querybuilder.php b/lib/private/db/querybuilder/querybuilder.php
deleted file mode 100644
index bb463e43a75..00000000000
--- a/lib/private/db/querybuilder/querybuilder.php
+++ /dev/null
@@ -1,1124 +0,0 @@
-<?php
-/**
- * @author Joas Schilling <nickvergessen@owncloud.com>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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\QueryBuilder;
-
-use Doctrine\DBAL\Platforms\MySqlPlatform;
-use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
-use OC\DB\OracleConnection;
-use OC\DB\QueryBuilder\ExpressionBuilder\ExpressionBuilder;
-use OC\DB\QueryBuilder\ExpressionBuilder\MySqlExpressionBuilder;
-use OC\DB\QueryBuilder\ExpressionBuilder\OCIExpressionBuilder;
-use OC\DB\QueryBuilder\ExpressionBuilder\PgSqlExpressionBuilder;
-use OCP\DB\QueryBuilder\IQueryBuilder;
-use OCP\DB\QueryBuilder\IQueryFunction;
-use OCP\DB\QueryBuilder\IParameter;
-use OCP\IDBConnection;
-
-class QueryBuilder implements IQueryBuilder {
-
-	/** @var \OCP\IDBConnection */
-	private $connection;
-
-	/** @var \Doctrine\DBAL\Query\QueryBuilder */
-	private $queryBuilder;
-
-	/** @var QuoteHelper */
-	private $helper;
-
-	/** @var bool */
-	private $automaticTablePrefix = true;
-
-	/** @var string */
-	protected $lastInsertedTable;
-
-	/**
-	 * Initializes a new QueryBuilder.
-	 *
-	 * @param \OCP\IDBConnection $connection
-	 */
-	public function __construct(IDBConnection $connection) {
-		$this->connection = $connection;
-		$this->queryBuilder = new \Doctrine\DBAL\Query\QueryBuilder($this->connection);
-		$this->helper = new QuoteHelper();
-	}
-
-	/**
-	 * Enable/disable automatic prefixing of table names with the oc_ prefix
-	 *
-	 * @param bool $enabled If set to true table names will be prefixed with the
-	 * owncloud database prefix automatically.
-	 * @since 8.2.0
-	 */
-	public function automaticTablePrefix($enabled) {
-		$this->automaticTablePrefix = (bool) $enabled;
-	}
-
-	/**
-	 * Gets an ExpressionBuilder used for object-oriented construction of query expressions.
-	 * This producer method is intended for convenient inline usage. Example:
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u')
-	 *         ->from('users', 'u')
-	 *         ->where($qb->expr()->eq('u.id', 1));
-	 * </code>
-	 *
-	 * For more complex expression construction, consider storing the expression
-	 * builder object in a local variable.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IExpressionBuilder
-	 */
-	public function expr() {
-		if ($this->connection instanceof OracleConnection) {
-			return new OCIExpressionBuilder($this->connection);
-		} else if ($this->connection->getDatabasePlatform() instanceof PostgreSqlPlatform) {
-			return new PgSqlExpressionBuilder($this->connection);
-		} else if ($this->connection->getDatabasePlatform() instanceof MySqlPlatform) {
-			return new MySqlExpressionBuilder($this->connection);
-		} else {
-			return new ExpressionBuilder($this->connection);
-		}
-	}
-
-	/**
-	 * Gets the type of the currently built query.
-	 *
-	 * @return integer
-	 */
-	public function getType() {
-		return $this->queryBuilder->getType();
-	}
-
-	/**
-	 * Gets the associated DBAL Connection for this query builder.
-	 *
-	 * @return \OCP\IDBConnection
-	 */
-	public function getConnection() {
-		return $this->connection;
-	}
-
-	/**
-	 * Gets the state of this query builder instance.
-	 *
-	 * @return integer Either QueryBuilder::STATE_DIRTY or QueryBuilder::STATE_CLEAN.
-	 */
-	public function getState() {
-		return $this->queryBuilder->getState();
-	}
-
-	/**
-	 * Executes this query using the bound parameters and their types.
-	 *
-	 * Uses {@see Connection::executeQuery} for select statements and {@see Connection::executeUpdate}
-	 * for insert, update and delete statements.
-	 *
-	 * @return \Doctrine\DBAL\Driver\Statement|int
-	 */
-	public function execute() {
-		return $this->queryBuilder->execute();
-	}
-
-	/**
-	 * Gets the complete SQL string formed by the current specifications of this QueryBuilder.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u')
-	 *         ->from('User', 'u')
-	 *     echo $qb->getSQL(); // SELECT u FROM User u
-	 * </code>
-	 *
-	 * @return string The SQL query string.
-	 */
-	public function getSQL() {
-		return $this->queryBuilder->getSQL();
-	}
-
-	/**
-	 * Sets a query parameter for the query being constructed.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u')
-	 *         ->from('users', 'u')
-	 *         ->where('u.id = :user_id')
-	 *         ->setParameter(':user_id', 1);
-	 * </code>
-	 *
-	 * @param string|integer $key The parameter position or name.
-	 * @param mixed $value The parameter value.
-	 * @param string|null $type One of the IQueryBuilder::PARAM_* constants.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function setParameter($key, $value, $type = null) {
-		$this->queryBuilder->setParameter($key, $value, $type);
-
-		return $this;
-	}
-
-	/**
-	 * Sets a collection of query parameters for the query being constructed.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u')
-	 *         ->from('users', 'u')
-	 *         ->where('u.id = :user_id1 OR u.id = :user_id2')
-	 *         ->setParameters(array(
-	 *             ':user_id1' => 1,
-	 *             ':user_id2' => 2
-	 *         ));
-	 * </code>
-	 *
-	 * @param array $params The query parameters to set.
-	 * @param array $types The query parameters types to set.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function setParameters(array $params, array $types = array()) {
-		$this->queryBuilder->setParameters($params, $types);
-
-		return $this;
-	}
-
-	/**
-	 * Gets all defined query parameters for the query being constructed indexed by parameter index or name.
-	 *
-	 * @return array The currently defined query parameters indexed by parameter index or name.
-	 */
-	public function getParameters() {
-		return $this->queryBuilder->getParameters();
-	}
-
-	/**
-	 * Gets a (previously set) query parameter of the query being constructed.
-	 *
-	 * @param mixed $key The key (index or name) of the bound parameter.
-	 *
-	 * @return mixed The value of the bound parameter.
-	 */
-	public function getParameter($key) {
-		return $this->queryBuilder->getParameter($key);
-	}
-
-	/**
-	 * Gets all defined query parameter types for the query being constructed indexed by parameter index or name.
-	 *
-	 * @return array The currently defined query parameter types indexed by parameter index or name.
-	 */
-	public function getParameterTypes() {
-		return $this->queryBuilder->getParameterTypes();
-	}
-
-	/**
-	 * Gets a (previously set) query parameter type of the query being constructed.
-	 *
-	 * @param mixed $key The key (index or name) of the bound parameter type.
-	 *
-	 * @return mixed The value of the bound parameter type.
-	 */
-	public function getParameterType($key) {
-		return $this->queryBuilder->getParameterType($key);
-	}
-
-	/**
-	 * Sets the position of the first result to retrieve (the "offset").
-	 *
-	 * @param integer $firstResult The first result to return.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function setFirstResult($firstResult) {
-		$this->queryBuilder->setFirstResult($firstResult);
-
-		return $this;
-	}
-
-	/**
-	 * Gets the position of the first result the query object was set to retrieve (the "offset").
-	 * Returns NULL if {@link setFirstResult} was not applied to this QueryBuilder.
-	 *
-	 * @return integer The position of the first result.
-	 */
-	public function getFirstResult() {
-		return $this->queryBuilder->getFirstResult();
-	}
-
-	/**
-	 * Sets the maximum number of results to retrieve (the "limit").
-	 *
-	 * NOTE: Setting max results to "0" will cause mixed behaviour. While most
-	 * of the databases will just return an empty result set, Oracle will return
-	 * all entries.
-	 *
-	 * @param integer $maxResults The maximum number of results to retrieve.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function setMaxResults($maxResults) {
-		$this->queryBuilder->setMaxResults($maxResults);
-
-		return $this;
-	}
-
-	/**
-	 * Gets the maximum number of results the query object was set to retrieve (the "limit").
-	 * Returns NULL if {@link setMaxResults} was not applied to this query builder.
-	 *
-	 * @return integer The maximum number of results.
-	 */
-	public function getMaxResults() {
-		return $this->queryBuilder->getMaxResults();
-	}
-
-	/**
-	 * Specifies an item that is to be returned in the query result.
-	 * Replaces any previously specified selections, if any.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u.id', 'p.id')
-	 *         ->from('users', 'u')
-	 *         ->leftJoin('u', 'phonenumbers', 'p', 'u.id = p.user_id');
-	 * </code>
-	 *
-	 * @param mixed $select The selection expressions.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function select($select = null) {
-		$selects = is_array($select) ? $select : func_get_args();
-
-		$this->queryBuilder->select(
-			$this->helper->quoteColumnNames($selects)
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Specifies an item that is to be returned with a different name in the query result.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->selectAlias('u.id', 'user_id')
-	 *         ->from('users', 'u')
-	 *         ->leftJoin('u', 'phonenumbers', 'p', 'u.id = p.user_id');
-	 * </code>
-	 *
-	 * @param mixed $select The selection expressions.
-	 * @param string $alias The column alias used in the constructed query.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function selectAlias($select, $alias) {
-
-		$this->queryBuilder->addSelect(
-			$this->helper->quoteColumnName($select) . ' AS ' . $this->helper->quoteColumnName($alias)
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Specifies an item that is to be returned uniquely in the query result.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->selectDistinct('type')
-	 *         ->from('users');
-	 * </code>
-	 *
-	 * @param mixed $select The selection expressions.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function selectDistinct($select) {
-
-		$this->queryBuilder->addSelect(
-			'DISTINCT ' . $this->helper->quoteColumnName($select)
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Adds an item that is to be returned in the query result.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u.id')
-	 *         ->addSelect('p.id')
-	 *         ->from('users', 'u')
-	 *         ->leftJoin('u', 'phonenumbers', 'u.id = p.user_id');
-	 * </code>
-	 *
-	 * @param mixed $select The selection expression.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function addSelect($select = null) {
-		$selects = is_array($select) ? $select : func_get_args();
-
-		$this->queryBuilder->addSelect(
-			$this->helper->quoteColumnNames($selects)
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Turns the query being built into a bulk delete query that ranges over
-	 * a certain table.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->delete('users', 'u')
-	 *         ->where('u.id = :user_id');
-	 *         ->setParameter(':user_id', 1);
-	 * </code>
-	 *
-	 * @param string $delete The table whose rows are subject to the deletion.
-	 * @param string $alias The table alias used in the constructed query.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function delete($delete = null, $alias = null) {
-		$this->queryBuilder->delete(
-			$this->getTableName($delete),
-			$alias
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Turns the query being built into a bulk update query that ranges over
-	 * a certain table
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->update('users', 'u')
-	 *         ->set('u.password', md5('password'))
-	 *         ->where('u.id = ?');
-	 * </code>
-	 *
-	 * @param string $update The table whose rows are subject to the update.
-	 * @param string $alias The table alias used in the constructed query.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function update($update = null, $alias = null) {
-		$this->queryBuilder->update(
-			$this->getTableName($update),
-			$alias
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Turns the query being built into an insert query that inserts into
-	 * a certain table
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->insert('users')
-	 *         ->values(
-	 *             array(
-	 *                 'name' => '?',
-	 *                 'password' => '?'
-	 *             )
-	 *         );
-	 * </code>
-	 *
-	 * @param string $insert The table into which the rows should be inserted.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function insert($insert = null) {
-		$this->queryBuilder->insert(
-			$this->getTableName($insert)
-		);
-
-		$this->lastInsertedTable = $insert;
-
-		return $this;
-	}
-
-	/**
-	 * Creates and adds a query root corresponding to the table identified by the
-	 * given alias, forming a cartesian product with any existing query roots.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u.id')
-	 *         ->from('users', 'u')
-	 * </code>
-	 *
-	 * @param string $from The table.
-	 * @param string|null $alias The alias of the table.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function from($from, $alias = null) {
-		$this->queryBuilder->from(
-			$this->getTableName($from),
-			$alias
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Creates and adds a join to the query.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u.name')
-	 *         ->from('users', 'u')
-	 *         ->join('u', 'phonenumbers', 'p', 'p.is_primary = 1');
-	 * </code>
-	 *
-	 * @param string $fromAlias The alias that points to a from clause.
-	 * @param string $join The table name to join.
-	 * @param string $alias The alias of the join table.
-	 * @param string $condition The condition for the join.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function join($fromAlias, $join, $alias, $condition = null) {
-		$this->queryBuilder->join(
-			$fromAlias,
-			$this->getTableName($join),
-			$alias,
-			$condition
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Creates and adds a join to the query.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u.name')
-	 *         ->from('users', 'u')
-	 *         ->innerJoin('u', 'phonenumbers', 'p', 'p.is_primary = 1');
-	 * </code>
-	 *
-	 * @param string $fromAlias The alias that points to a from clause.
-	 * @param string $join The table name to join.
-	 * @param string $alias The alias of the join table.
-	 * @param string $condition The condition for the join.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function innerJoin($fromAlias, $join, $alias, $condition = null) {
-		$this->queryBuilder->innerJoin(
-			$fromAlias,
-			$this->getTableName($join),
-			$alias,
-			$condition
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Creates and adds a left join to the query.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u.name')
-	 *         ->from('users', 'u')
-	 *         ->leftJoin('u', 'phonenumbers', 'p', 'p.is_primary = 1');
-	 * </code>
-	 *
-	 * @param string $fromAlias The alias that points to a from clause.
-	 * @param string $join The table name to join.
-	 * @param string $alias The alias of the join table.
-	 * @param string $condition The condition for the join.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function leftJoin($fromAlias, $join, $alias, $condition = null) {
-		$this->queryBuilder->leftJoin(
-			$fromAlias,
-			$this->getTableName($join),
-			$alias,
-			$condition
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Creates and adds a right join to the query.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u.name')
-	 *         ->from('users', 'u')
-	 *         ->rightJoin('u', 'phonenumbers', 'p', 'p.is_primary = 1');
-	 * </code>
-	 *
-	 * @param string $fromAlias The alias that points to a from clause.
-	 * @param string $join The table name to join.
-	 * @param string $alias The alias of the join table.
-	 * @param string $condition The condition for the join.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function rightJoin($fromAlias, $join, $alias, $condition = null) {
-		$this->queryBuilder->rightJoin(
-			$fromAlias,
-			$this->getTableName($join),
-			$alias,
-			$condition
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Sets a new value for a column in a bulk update query.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->update('users', 'u')
-	 *         ->set('u.password', md5('password'))
-	 *         ->where('u.id = ?');
-	 * </code>
-	 *
-	 * @param string $key The column to set.
-	 * @param string $value The value, expression, placeholder, etc.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function set($key, $value) {
-		$this->queryBuilder->set(
-			$this->helper->quoteColumnName($key),
-			$this->helper->quoteColumnName($value)
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Specifies one or more restrictions to the query result.
-	 * Replaces any previously specified restrictions, if any.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u.name')
-	 *         ->from('users', 'u')
-	 *         ->where('u.id = ?');
-	 *
-	 *     // You can optionally programatically build and/or expressions
-	 *     $qb = $conn->getQueryBuilder();
-	 *
-	 *     $or = $qb->expr()->orx();
-	 *     $or->add($qb->expr()->eq('u.id', 1));
-	 *     $or->add($qb->expr()->eq('u.id', 2));
-	 *
-	 *     $qb->update('users', 'u')
-	 *         ->set('u.password', md5('password'))
-	 *         ->where($or);
-	 * </code>
-	 *
-	 * @param mixed $predicates The restriction predicates.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function where($predicates) {
-		call_user_func_array(
-			[$this->queryBuilder, 'where'],
-			func_get_args()
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Adds one or more restrictions to the query results, forming a logical
-	 * conjunction with any previously specified restrictions.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u')
-	 *         ->from('users', 'u')
-	 *         ->where('u.username LIKE ?')
-	 *         ->andWhere('u.is_active = 1');
-	 * </code>
-	 *
-	 * @param mixed $where The query restrictions.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 *
-	 * @see where()
-	 */
-	public function andWhere($where) {
-		call_user_func_array(
-			[$this->queryBuilder, 'andWhere'],
-			func_get_args()
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Adds one or more restrictions to the query results, forming a logical
-	 * disjunction with any previously specified restrictions.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u.name')
-	 *         ->from('users', 'u')
-	 *         ->where('u.id = 1')
-	 *         ->orWhere('u.id = 2');
-	 * </code>
-	 *
-	 * @param mixed $where The WHERE statement.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 *
-	 * @see where()
-	 */
-	public function orWhere($where) {
-		call_user_func_array(
-			[$this->queryBuilder, 'orWhere'],
-			func_get_args()
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Specifies a grouping over the results of the query.
-	 * Replaces any previously specified groupings, if any.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u.name')
-	 *         ->from('users', 'u')
-	 *         ->groupBy('u.id');
-	 * </code>
-	 *
-	 * @param mixed $groupBy The grouping expression.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function groupBy($groupBy) {
-		$groupBys = is_array($groupBy) ? $groupBy : func_get_args();
-
-		call_user_func_array(
-			[$this->queryBuilder, 'groupBy'],
-			$this->helper->quoteColumnNames($groupBys)
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Adds a grouping expression to the query.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->select('u.name')
-	 *         ->from('users', 'u')
-	 *         ->groupBy('u.lastLogin');
-	 *         ->addGroupBy('u.createdAt')
-	 * </code>
-	 *
-	 * @param mixed $groupBy The grouping expression.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function addGroupBy($groupBy) {
-		$groupBys = is_array($groupBy) ? $groupBy : func_get_args();
-
-		call_user_func_array(
-			[$this->queryBuilder, 'addGroupBy'],
-			$this->helper->quoteColumnNames($groupBys)
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Sets a value for a column in an insert query.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->insert('users')
-	 *         ->values(
-	 *             array(
-	 *                 'name' => '?'
-	 *             )
-	 *         )
-	 *         ->setValue('password', '?');
-	 * </code>
-	 *
-	 * @param string $column The column into which the value should be inserted.
-	 * @param string $value The value that should be inserted into the column.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function setValue($column, $value) {
-		$this->queryBuilder->setValue(
-			$this->helper->quoteColumnName($column),
-			$value
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Specifies values for an insert query indexed by column names.
-	 * Replaces any previous values, if any.
-	 *
-	 * <code>
-	 *     $qb = $conn->getQueryBuilder()
-	 *         ->insert('users')
-	 *         ->values(
-	 *             array(
-	 *                 'name' => '?',
-	 *                 'password' => '?'
-	 *             )
-	 *         );
-	 * </code>
-	 *
-	 * @param array $values The values to specify for the insert query indexed by column names.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function values(array $values) {
-		$quotedValues = [];
-		foreach ($values as $key => $value) {
-			$quotedValues[$this->helper->quoteColumnName($key)] = $value;
-		}
-
-		$this->queryBuilder->values($quotedValues);
-
-		return $this;
-	}
-
-	/**
-	 * Specifies a restriction over the groups of the query.
-	 * Replaces any previous having restrictions, if any.
-	 *
-	 * @param mixed $having The restriction over the groups.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function having($having) {
-		call_user_func_array(
-			[$this->queryBuilder, 'having'],
-			func_get_args()
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Adds a restriction over the groups of the query, forming a logical
-	 * conjunction with any existing having restrictions.
-	 *
-	 * @param mixed $having The restriction to append.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function andHaving($having) {
-		call_user_func_array(
-			[$this->queryBuilder, 'andHaving'],
-			func_get_args()
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Adds a restriction over the groups of the query, forming a logical
-	 * disjunction with any existing having restrictions.
-	 *
-	 * @param mixed $having The restriction to add.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function orHaving($having) {
-		call_user_func_array(
-			[$this->queryBuilder, 'orHaving'],
-			func_get_args()
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Specifies an ordering for the query results.
-	 * Replaces any previously specified orderings, if any.
-	 *
-	 * @param string $sort The ordering expression.
-	 * @param string $order The ordering direction.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function orderBy($sort, $order = null) {
-		$this->queryBuilder->orderBy(
-			$this->helper->quoteColumnName($sort),
-			$order
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Adds an ordering to the query results.
-	 *
-	 * @param string $sort The ordering expression.
-	 * @param string $order The ordering direction.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function addOrderBy($sort, $order = null) {
-		$this->queryBuilder->addOrderBy(
-			$this->helper->quoteColumnName($sort),
-			$order
-		);
-
-		return $this;
-	}
-
-	/**
-	 * Gets a query part by its name.
-	 *
-	 * @param string $queryPartName
-	 *
-	 * @return mixed
-	 */
-	public function getQueryPart($queryPartName) {
-		return $this->queryBuilder->getQueryPart($queryPartName);
-	}
-
-	/**
-	 * Gets all query parts.
-	 *
-	 * @return array
-	 */
-	public function getQueryParts() {
-		return $this->queryBuilder->getQueryParts();
-	}
-
-	/**
-	 * Resets SQL parts.
-	 *
-	 * @param array|null $queryPartNames
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function resetQueryParts($queryPartNames = null) {
-		$this->queryBuilder->resetQueryParts($queryPartNames);
-
-		return $this;
-	}
-
-	/**
-	 * Resets a single SQL part.
-	 *
-	 * @param string $queryPartName
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder This QueryBuilder instance.
-	 */
-	public function resetQueryPart($queryPartName) {
-		$this->queryBuilder->resetQueryPart($queryPartName);
-
-		return $this;
-	}
-
-	/**
-	 * Creates a new named parameter and bind the value $value to it.
-	 *
-	 * This method provides a shortcut for PDOStatement::bindValue
-	 * when using prepared statements.
-	 *
-	 * The parameter $value specifies the value that you want to bind. If
-	 * $placeholder is not provided bindValue() will automatically create a
-	 * placeholder for you. An automatic placeholder will be of the name
-	 * ':dcValue1', ':dcValue2' etc.
-	 *
-	 * For more information see {@link http://php.net/pdostatement-bindparam}
-	 *
-	 * Example:
-	 * <code>
-	 * $value = 2;
-	 * $q->eq( 'id', $q->bindValue( $value ) );
-	 * $stmt = $q->executeQuery(); // executed with 'id = 2'
-	 * </code>
-	 *
-	 * @license New BSD License
-	 * @link http://www.zetacomponents.org
-	 *
-	 * @param mixed $value
-	 * @param mixed $type
-	 * @param string $placeHolder The name to bind with. The string must start with a colon ':'.
-	 *
-	 * @return IParameter the placeholder name used.
-	 */
-	public function createNamedParameter($value, $type = IQueryBuilder::PARAM_STR, $placeHolder = null) {
-		return new Parameter($this->queryBuilder->createNamedParameter($value, $type, $placeHolder));
-	}
-
-	/**
-	 * Creates a new positional parameter and bind the given value to it.
-	 *
-	 * Attention: If you are using positional parameters with the query builder you have
-	 * to be very careful to bind all parameters in the order they appear in the SQL
-	 * statement , otherwise they get bound in the wrong order which can lead to serious
-	 * bugs in your code.
-	 *
-	 * Example:
-	 * <code>
-	 *  $qb = $conn->getQueryBuilder();
-	 *  $qb->select('u.*')
-	 *     ->from('users', 'u')
-	 *     ->where('u.username = ' . $qb->createPositionalParameter('Foo', IQueryBuilder::PARAM_STR))
-	 *     ->orWhere('u.username = ' . $qb->createPositionalParameter('Bar', IQueryBuilder::PARAM_STR))
-	 * </code>
-	 *
-	 * @param mixed $value
-	 * @param integer $type
-	 *
-	 * @return IParameter
-	 */
-	public function createPositionalParameter($value, $type = IQueryBuilder::PARAM_STR) {
-		return new Parameter($this->queryBuilder->createPositionalParameter($value, $type));
-	}
-
-	/**
-	 * Creates a new parameter
-	 *
-	 * Example:
-	 * <code>
-	 *  $qb = $conn->getQueryBuilder();
-	 *  $qb->select('u.*')
-	 *     ->from('users', 'u')
-	 *     ->where('u.username = ' . $qb->createParameter('name'))
-	 *     ->setParameter('name', 'Bar', IQueryBuilder::PARAM_STR))
-	 * </code>
-	 *
-	 * @param string $name
-	 *
-	 * @return IParameter
-	 */
-	public function createParameter($name) {
-		return new Parameter(':' . $name);
-	}
-
-	/**
-	 * Creates a new function
-	 *
-	 * Attention: Column names inside the call have to be quoted before hand
-	 *
-	 * Example:
-	 * <code>
-	 *  $qb = $conn->getQueryBuilder();
-	 *  $qb->select($qb->createFunction('COUNT(*)'))
-	 *     ->from('users', 'u')
-	 *  echo $qb->getSQL(); // SELECT COUNT(*) FROM `users` u
-	 * </code>
-	 * <code>
-	 *  $qb = $conn->getQueryBuilder();
-	 *  $qb->select($qb->createFunction('COUNT(`column`)'))
-	 *     ->from('users', 'u')
-	 *  echo $qb->getSQL(); // SELECT COUNT(`column`) FROM `users` u
-	 * </code>
-	 *
-	 * @param string $call
-	 *
-	 * @return IQueryFunction
-	 */
-	public function createFunction($call) {
-		return new QueryFunction($call);
-	}
-
-	/**
-	 * Used to get the id of the last inserted element
-	 * @return int
-	 * @throws \BadMethodCallException When being called before an insert query has been run.
-	 */
-	public function getLastInsertId() {
-		if ($this->getType() === \Doctrine\DBAL\Query\QueryBuilder::INSERT && $this->lastInsertedTable) {
-			// lastInsertId() needs the prefix but no quotes
-			$table = $this->prefixTableName($this->lastInsertedTable);
-			return (int) $this->connection->lastInsertId($table);
-		}
-
-		throw new \BadMethodCallException('Invalid call to getLastInsertId without using insert() before.');
-	}
-
-	/**
-	 * Returns the table name quoted and with database prefix as needed by the implementation
-	 *
-	 * @param string $table
-	 * @return string
-	 */
-	public function getTableName($table) {
-		$table = $this->prefixTableName($table);
-		return $this->helper->quoteColumnName($table);
-	}
-
-	/**
-	 * Returns the table name with database prefix as needed by the implementation
-	 *
-	 * @param string $table
-	 * @return string
-	 */
-	protected function prefixTableName($table) {
-		if ($this->automaticTablePrefix === false || strpos($table, '*PREFIX*') === 0) {
-			return $table;
-		}
-
-		return '*PREFIX*' . $table;
-	}
-
-	/**
-	 * Returns the column name quoted and with table alias prefix as needed by the implementation
-	 *
-	 * @param string $column
-	 * @param string $tableAlias
-	 * @return string
-	 */
-	public function getColumnName($column, $tableAlias = '') {
-		if ($tableAlias !== '') {
-			$tableAlias .= '.';
-		}
-
-		return $this->helper->quoteColumnName($tableAlias . $column);
-	}
-}
diff --git a/lib/private/db/querybuilder/queryfunction.php b/lib/private/db/querybuilder/queryfunction.php
deleted file mode 100644
index ac6d73f3cbf..00000000000
--- a/lib/private/db/querybuilder/queryfunction.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-/**
- * @author Joas Schilling <nickvergessen@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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\QueryBuilder;
-
-use OCP\DB\QueryBuilder\IQueryFunction;
-
-class QueryFunction implements IQueryFunction {
-	/** @var string */
-	protected $function;
-
-	public function __construct($function) {
-		$this->function = $function;
-	}
-
-	/**
-	 * @return string
-	 */
-	public function __toString() {
-		return (string) $this->function;
-	}
-}
diff --git a/lib/private/db/querybuilder/quotehelper.php b/lib/private/db/querybuilder/quotehelper.php
deleted file mode 100644
index fda243a3786..00000000000
--- a/lib/private/db/querybuilder/quotehelper.php
+++ /dev/null
@@ -1,75 +0,0 @@
-<?php
-/**
- * @author Joas Schilling <nickvergessen@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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\QueryBuilder;
-
-use OCP\DB\QueryBuilder\ILiteral;
-use OCP\DB\QueryBuilder\IParameter;
-use OCP\DB\QueryBuilder\IQueryFunction;
-
-class QuoteHelper {
-	/**
-	 * @param array|string|ILiteral|IParameter|IQueryFunction $strings string, Literal or Parameter
-	 * @return array|string
-	 */
-	public function quoteColumnNames($strings) {
-		if (!is_array($strings)) {
-			return $this->quoteColumnName($strings);
-		}
-
-		$return = [];
-		foreach ($strings as $string) {
-			$return[] = $this->quoteColumnName($string);
-		}
-
-		return $return;
-	}
-
-	/**
-	 * @param string|ILiteral|IParameter|IQueryFunction $string string, Literal or Parameter
-	 * @return string
-	 */
-	public function quoteColumnName($string) {
-		if ($string instanceof IParameter || $string instanceof ILiteral || $string instanceof IQueryFunction) {
-			return (string) $string;
-		}
-
-		if ($string === null || $string === 'null' || $string === '*') {
-			return $string;
-		}
-
-		if (!is_string($string)) {
-			throw new \InvalidArgumentException('Only strings, Literals and Parameters are allowed');
-		}
-
-		if (substr_count($string, '.')) {
-			list($alias, $columnName) = explode('.', $string, 2);
-
-			if ($columnName === '*') {
-				return $string;
-			}
-
-			return $alias . '.`' . $columnName . '`';
-		}
-
-		return '`' . $string . '`';
-	}
-}
diff --git a/lib/private/db/sqlitemigrator.php b/lib/private/db/sqlitemigrator.php
deleted file mode 100644
index 8ea32581011..00000000000
--- a/lib/private/db/sqlitemigrator.php
+++ /dev/null
@@ -1,81 +0,0 @@
-<?php
-/**
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- * @author Victor Dubiniuk <dubiniuk@owncloud.com>
- *
- * @copyright Copyright (c) 2016, 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\Schema\Schema;
-
-class SQLiteMigrator extends Migrator {
-
-	/**
-	 * @param \Doctrine\DBAL\Schema\Schema $targetSchema
-	 * @throws \OC\DB\MigrationException
-	 *
-	 * For sqlite we simple make a copy of the entire database, and test the migration on that
-	 */
-	public function checkMigrate(\Doctrine\DBAL\Schema\Schema $targetSchema) {
-		$dbFile = $this->connection->getDatabase();
-		$tmpFile = $this->buildTempDatabase();
-		copy($dbFile, $tmpFile);
-
-		$connectionParams = array(
-			'path' => $tmpFile,
-			'driver' => 'pdo_sqlite',
-		);
-		$conn = \Doctrine\DBAL\DriverManager::getConnection($connectionParams);
-		try {
-			$this->applySchema($targetSchema, $conn);
-			$conn->close();
-			unlink($tmpFile);
-		} catch (DBALException $e) {
-			$conn->close();
-			unlink($tmpFile);
-			throw new MigrationException('', $e->getMessage());
-		}
-	}
-
-	/**
-	 * @return string
-	 */
-	private function buildTempDatabase() {
-		$dataDir = $this->config->getSystemValue("datadirectory", \OC::$SERVERROOT . '/data');
-		$tmpFile = uniqid("oc_");
-		return "$dataDir/$tmpFile.db";
-	}
-
-	/**
-	 * @param Schema $targetSchema
-	 * @param \Doctrine\DBAL\Connection $connection
-	 * @return \Doctrine\DBAL\Schema\SchemaDiff
-	 */
-	protected function getDiff(Schema $targetSchema, \Doctrine\DBAL\Connection $connection) {
-		$platform = $connection->getDatabasePlatform();
-		$platform->registerDoctrineTypeMapping('tinyint unsigned', 'integer');
-		$platform->registerDoctrineTypeMapping('smallint unsigned', 'integer');
-		$platform->registerDoctrineTypeMapping('varchar ', 'string');
-
-		return parent::getDiff($targetSchema, $connection);
-	}
-}
diff --git a/lib/private/db/sqlitesessioninit.php b/lib/private/db/sqlitesessioninit.php
deleted file mode 100644
index 0683c47d08e..00000000000
--- a/lib/private/db/sqlitesessioninit.php
+++ /dev/null
@@ -1,65 +0,0 @@
-<?php
-/**
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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\Event\ConnectionEventArgs;
-use Doctrine\DBAL\Events;
-use Doctrine\Common\EventSubscriber;
-
-class SQLiteSessionInit implements EventSubscriber {
-	/**
-	 * @var bool
-	 */
-	private $caseSensitiveLike;
-
-	/**
-	 * @var string
-	 */
-	private $journalMode;
-
-	/**
-	 * Configure case sensitive like for each connection
-	 *
-	 * @param bool $caseSensitiveLike
-	 * @param string $journalMode
-	 */
-	public function __construct($caseSensitiveLike, $journalMode) {
-		$this->caseSensitiveLike = $caseSensitiveLike;
-		$this->journalMode = $journalMode;
-	}
-
-	/**
-	 * @param ConnectionEventArgs $args
-	 * @return void
-	 */
-	public function postConnect(ConnectionEventArgs $args) {
-		$sensitive = ($this->caseSensitiveLike) ? 'true' : 'false';
-		$args->getConnection()->executeUpdate('PRAGMA case_sensitive_like = ' . $sensitive);
-		$args->getConnection()->executeUpdate('PRAGMA journal_mode = ' . $this->journalMode);
-	}
-
-	public function getSubscribedEvents() {
-		return array(Events::postConnect);
-	}
-}
diff --git a/lib/private/db/statementwrapper.php b/lib/private/db/statementwrapper.php
deleted file mode 100644
index 6422d8d5f1b..00000000000
--- a/lib/private/db/statementwrapper.php
+++ /dev/null
@@ -1,122 +0,0 @@
-<?php
-/**
- * @author Arthur Schiwon <blizzz@owncloud.com>
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Jörn Friedrich Dreyer <jfd@butonic.de>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Robin McCorkell <robin@mccorkell.me.uk>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @copyright Copyright (c) 2016, 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/>
- *
- */
-
-/**
- * small wrapper around \Doctrine\DBAL\Driver\Statement to make it behave, more like an MDB2 Statement
- *
- * @method boolean bindValue(mixed $param, mixed $value, integer $type = null);
- * @method string errorCode();
- * @method array errorInfo();
- * @method integer rowCount();
- * @method array fetchAll(integer $fetchMode = null);
- */
-class OC_DB_StatementWrapper {
-	/**
-	 * @var \Doctrine\DBAL\Driver\Statement
-	 */
-	private $statement = null;
-	private $isManipulation = false;
-	private $lastArguments = array();
-
-	/**
-	 * @param boolean $isManipulation
-	 */
-	public function __construct($statement, $isManipulation) {
-		$this->statement = $statement;
-		$this->isManipulation = $isManipulation;
-	}
-
-	/**
-	 * pass all other function directly to the \Doctrine\DBAL\Driver\Statement
-	 */
-	public function __call($name,$arguments) {
-		return call_user_func_array(array($this->statement,$name), $arguments);
-	}
-
-	/**
-	 * make execute return the result instead of a bool
-	 *
-	 * @param array $input
-	 * @return \OC_DB_StatementWrapper|int
-	 */
-	public function execute($input=array()) {
-		if(\OC::$server->getSystemConfig()->getValue( "log_query", false)) {
-			$params_str = str_replace("\n", " ", var_export($input, true));
-			\OCP\Util::writeLog('core', 'DB execute with arguments : '.$params_str, \OCP\Util::DEBUG);
-		}
-		$this->lastArguments = $input;
-		if (count($input) > 0) {
-			$result = $this->statement->execute($input);
-		} else {
-			$result = $this->statement->execute();
-		}
-
-		if ($result === false) {
-			return false;
-		}
-		if ($this->isManipulation) {
-			$count = $this->statement->rowCount();
-			return $count;
-		} else {
-			return $this;
-		}
-	}
-
-	/**
-	 * provide an alias for fetch
-	 *
-	 * @return mixed
-	 */
-	public function fetchRow() {
-		return $this->statement->fetch();
-	}
-
-	/**
-	 * Provide a simple fetchOne.
-	 *
-	 * fetch single column from the next row
-	 * @param int $column the column number to fetch
-	 * @return string
-	 */
-	public function fetchOne($column = 0) {
-		return $this->statement->fetchColumn($column);
-	}
-
-	/**
-	 * Binds a PHP variable to a corresponding named or question mark placeholder in the
-	 * SQL statement that was use to prepare the statement.
-	 *
-	 * @param mixed $column Either the placeholder name or the 1-indexed placeholder index
-	 * @param mixed $variable The variable to bind
-	 * @param integer|null $type one of the  PDO::PARAM_* constants
-	 * @param integer|null $length max length when using an OUT bind
-	 * @return boolean
-	 */
-	public function bindParam($column, &$variable, $type = null, $length = null){
-		return $this->statement->bindParam($column, $variable, $type, $length);
-	}
-}