Connection::setValues() - Code Metrics - Inspection of "Merge pull request #21641 from nextcloud/techdebt/..." - nextcloud/server - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( 9af8c0...c15172 )

by Roeland

created 2021-03-25 07:58 UTC

Connection::setValues() B

↳ Parent: Connection

Complexity

Conditions	8
Paths	40

Size

Total Lines	42
Code Lines	31

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	8
eloc	31
nc	40
nop	4
dl	0
loc	42
rs	8.1795
c	0
b	0
f	0

<?php

declare(strict_types=1);

/**
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 *
 * @author Bart Visscher <[email protected]>
 * @author Christoph Wurst <[email protected]>
 * @author Joas Schilling <[email protected]>
 * @author Julius Härtl <[email protected]>
 * @author Morris Jobke <[email protected]>
 * @author Ole Ostergaard <[email protected]>
 * @author Ole Ostergaard <[email protected]>
 * @author Philipp Schaffrath <[email protected]>
 * @author Robin Appelman <[email protected]>
 * @author Robin McCorkell <[email protected]>
 * @author Roeland Jago Douma <[email protected]>
 * @author Thomas Müller <[email protected]>
 *
 * @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\Common\EventManager;
use Doctrine\DBAL\Cache\QueryCacheProfile;
use Doctrine\DBAL\Configuration;
use Doctrine\DBAL\Driver;
use Doctrine\DBAL\Exception;
use Doctrine\DBAL\Exception\ConstraintViolationException;
use Doctrine\DBAL\Exception\NotNullConstraintViolationException;
use Doctrine\DBAL\Platforms\MySQLPlatform;
use Doctrine\DBAL\Platforms\OraclePlatform;
use Doctrine\DBAL\Platforms\PostgreSQL94Platform;
use Doctrine\DBAL\Platforms\SqlitePlatform;
use Doctrine\DBAL\Result;
use Doctrine\DBAL\Schema\Schema;
use Doctrine\DBAL\Statement;
use OC\DB\QueryBuilder\QueryBuilder;
use OC\SystemConfig;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\ILogger;
use OCP\PreConditionNotMetException;

class Connection extends \Doctrine\DBAL\Connection {
	/** @var string */
	protected $tablePrefix;

	/** @var \OC\DB\Adapter $adapter */
	protected $adapter;

	/** @var SystemConfig */
	private $systemConfig;

	/** @var ILogger */
	private $logger;

	protected $lockedTable = null;

	/** @var int */
	protected $queriesBuilt = 0;

	/** @var int */
	protected $queriesExecuted = 0;

	/**
	 * @throws Exception
	 */
	public function connect() {
		try {
			return parent::connect();
		} catch (Exception $e) {
			// throw a new exception to prevent leaking info from the stacktrace
			throw new Exception('Failed to connect to the database: ' . $e->getMessage(), $e->getCode());
		}
	}

	public function getStats(): array {
		return [
			'built' => $this->queriesBuilt,
			'executed' => $this->queriesExecuted,
		];
	}

	/**
	 * Returns a QueryBuilder for the connection.
	 */
	public function getQueryBuilder(): IQueryBuilder {
		$this->queriesBuilt++;
		return new QueryBuilder(
			new ConnectionAdapter($this),
			$this->systemConfig,
			$this->logger
		);
	}

	/**
	 * 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]);
		$this->queriesBuilt++;
		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]);
		$this->queriesBuilt++;
		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($params['tablePrefix'])) {
			throw new \Exception('tablePrefix not set');
		}
		/**
		 * @psalm-suppress InternalMethod
		 */
		parent::__construct($params, $driver, $config, $eventManager);
		$this->adapter = new $params['adapter']($this);
		$this->tablePrefix = $params['tablePrefix'];

		$this->systemConfig = \OC::$server->getSystemConfig();
		$this->logger = \OC::$server->getLogger();
	}

	/**
	 * Prepares an SQL statement.
	 *
	 * @param string $statement The SQL statement to prepare.
	 * @param int $limit
	 * @param int $offset
	 *
	 * @return Statement The prepared statement.
	 * @throws Exception
	 */
	public function prepare($statement, $limit = null, $offset = null): Statement {
		if ($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);

		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                                      $sql  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 Result The executed statement.
	 *
	 * @throws \Doctrine\DBAL\Exception
	 */
	public function executeQuery(string $sql, array $params = [], $types = [], QueryCacheProfile $qcp = null): Result {
		$sql = $this->replaceTablePrefix($sql);
		$sql = $this->adapter->fixupStatement($sql);
		$this->queriesExecuted++;
		return parent::executeQuery($sql, $params, $types, $qcp);
	}

	/**
	 * @throws Exception
	 */
	public function executeUpdate(string $sql, array $params = [], array $types = []): int {
		$sql = $this->replaceTablePrefix($sql);
		$sql = $this->adapter->fixupStatement($sql);
		$this->queriesExecuted++;
		return parent::executeUpdate($sql, $params, $types);
	}

	/**
	 * 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 $sql  The SQL query.
	 * @param array  $params The query parameters.
	 * @param array  $types  The parameter types.
	 *
	 * @return int The number of affected rows.
	 *
	 * @throws \Doctrine\DBAL\Exception
	 */
	public function executeStatement($sql, array $params = [], array $types = []): int {
		$sql = $this->replaceTablePrefix($sql);
		$sql = $this->adapter->fixupStatement($sql);
		$this->queriesExecuted++;
		return parent::executeStatement($sql, $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 $seqName Name of the sequence object from which the ID should be returned.
	 *
	 * @return string the last inserted ID.
	 * @throws Exception
	 */
	public function lastInsertId($seqName = null) {
		if ($seqName) {
			$seqName = $this->replaceTablePrefix($seqName);
		}
		return $this->adapter->lastInsertId($seqName);
	}

	/**
	 * @internal
	 * @throws Exception
	 */
	public function realLastInsertId($seqName = null) {
		return parent::lastInsertId($seqName);
	}

	/**
	 * Insert a row if the matching row does not exists. To accomplish proper race condition avoidance
	 * it is needed that there is also a unique constraint on the values. Then this method will
	 * catch the exception and return 0.
	 *
	 * @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\Exception
	 * @deprecated 15.0.0 - use unique index and "try { $db->insert() } catch (UniqueConstraintViolationException $e) {}" instead, because it is more reliable and does not have the risk for deadlocks - see https://github.com/nextcloud/server/pull/12371
	 */
	public function insertIfNotExist($table, $input, array $compare = null) {
		return $this->adapter->insertIfNotExist($table, $input, $compare);
	}

	public function insertIgnoreConflict(string $table, array $values) : int {
		return $this->adapter->insertIgnoreConflict($table, $values);
	}

	private function getType($value) {
		if (is_bool($value)) {
			return IQueryBuilder::PARAM_BOOL;
		} elseif (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 $updatePreconditionValues ensure values match preconditions (column name => value)
	 * @return int number of new rows
	 * @throws \Doctrine\DBAL\Exception
	 * @throws PreConditionNotMetException
	 */
	public function setValues($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 (NotNullConstraintViolationException $e) {
			throw $e;
		} catch (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 => $value) {
				if ($value === '') {
					$where->add($updateQb->expr()->emptyString(
						$name
					));
				} else {
					$where->add($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;
		}
	}

	/**
	 * Create an exclusive read+write lock on a table
	 *
	 * @param string $tableName
	 *
	 * @throws \BadMethodCallException When trying to acquire a second lock
	 * @throws Exception
	 * @since 9.1.0
	 */
	public function lockTable($tableName) {
		if ($this->lockedTable !== null) {
			throw new \BadMethodCallException('Can not lock a new table until the previous lock is released.');
		}

		$tableName = $this->tablePrefix . $tableName;
		$this->lockedTable = $tableName;
		$this->adapter->lockTable($tableName);
	}

	/**
	 * Release a previous acquired lock again
	 *
	 * @throws Exception
	 * @since 9.1.0
	 */
	public function unlockTable() {
		$this->adapter->unlockTable();
		$this->lockedTable = null;
	}

	/**
	 * returns the error code and message as a string for logging
	 * works with DoctrineException
	 * @return string
	 */
	public function getError() {
		$msg = $this->errorCode() . ': ';
		$errorInfo = $this->errorInfo();
		if (!empty($errorInfo)) {
			$msg .= 'SQLSTATE = '.$errorInfo[0] . ', ';
			$msg .= 'Driver Code = '.$errorInfo[1] . ', ';
			$msg .= 'Driver Message = '.$errorInfo[2];
		}
		return $msg;
	}

	public function errorCode() {
		return -1;
	}

	public function errorInfo() {
		return [];
	}

	/**
	 * Drop a table from the database if it exists
	 *
	 * @param string $table table name without the prefix
	 *
	 * @throws Exception
	 */
	public function dropTable($table) {
		$table = $this->tablePrefix . trim($table);
		$schema = $this->getSchemaManager();
		if ($schema->tablesExist([$table])) {
			$schema->dropTable($table);
		}
	}

	/**
	 * Check if a table exists
	 *
	 * @param string $table table name without the prefix
	 *
	 * @return bool
	 * @throws Exception
	 */
	public function tableExists($table) {
		$table = $this->tablePrefix . trim($table);
		$schema = $this->getSchemaManager();
		return $schema->tablesExist([$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;
	}

	/**
	 * Escape a parameter to be used in a LIKE query
	 *
	 * @param string $param
	 * @return string
	 */
	public function escapeLikeParameter($param) {
		return addcslashes($param, '\\_%');
	}

	/**
	 * Check whether or not the current database support 4byte wide unicode
	 *
	 * @return bool
	 * @since 11.0.0
	 */
	public function supports4ByteText() {
		if (!$this->getDatabasePlatform() instanceof MySQLPlatform) {
			return true;
		}
		return $this->getParams()['charset'] === 'utf8mb4';
	}


	/**
	 * Create the schema of the connected database
	 *
	 * @return Schema
	 * @throws Exception
	 */
	public function createSchema() {
		$migrator = $this->getMigrator();
		return $migrator->createSchema();
	}

	/**
	 * Migrate the database to the given schema
	 *
	 * @param Schema $toSchema
	 *
	 * @throws Exception
	 */
	public function migrateToSchema(Schema $toSchema) {
		$migrator = $this->getMigrator();
		$migrator->migrate($toSchema);
	}

	private function getMigrator() {
		// TODO properly inject those dependencies
		$random = \OC::$server->getSecureRandom();

		$platform = $this->getDatabasePlatform();
		$config = \OC::$server->getConfig();
		$dispatcher = \OC::$server->getEventDispatcher();
		if ($platform instanceof SqlitePlatform) {
			return new SQLiteMigrator($this, $config, $dispatcher);
		} elseif ($platform instanceof OraclePlatform) {
			return new OracleMigrator($this, $config, $dispatcher);
		} elseif ($platform instanceof MySQLPlatform) {
			return new MySQLMigrator($this, $config, $dispatcher);
		} elseif ($platform instanceof PostgreSQL94Platform) {
			return new PostgreSqlMigrator($this, $config, $dispatcher);
		} else {
			return new Migrator($this, $config, $dispatcher);
		}
	}
}


1			<?php
2
3			declare(strict_types=1);
4
5			/**
6			* @copyright Copyright (c) 2016, ownCloud, Inc.
7			*
8			* @author Bart Visscher <[email protected]>
9			* @author Christoph Wurst <[email protected]>
10			* @author Joas Schilling <[email protected]>
11			* @author Julius Härtl <[email protected]>
12			* @author Morris Jobke <[email protected]>
13			* @author Ole Ostergaard <[email protected]>
14			* @author Ole Ostergaard <[email protected]>
15			* @author Philipp Schaffrath <[email protected]>
16			* @author Robin Appelman <[email protected]>
17			* @author Robin McCorkell <[email protected]>
18			* @author Roeland Jago Douma <[email protected]>
19			* @author Thomas Müller <[email protected]>
20			*
21			* @license AGPL-3.0
22			*
23			* This code is free software: you can redistribute it and/or modify
24			* it under the terms of the GNU Affero General Public License, version 3,
25			* as published by the Free Software Foundation.
26			*
27			* This program is distributed in the hope that it will be useful,
28			* but WITHOUT ANY WARRANTY; without even the implied warranty of
29			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30			* GNU Affero General Public License for more details.
31			*
32			* You should have received a copy of the GNU Affero General Public License, version 3,
33			* along with this program. If not, see <http://www.gnu.org/licenses/>
34			*
35			*/
36
37			namespace OC\DB;
38
39			use Doctrine\Common\EventManager;
40			use Doctrine\DBAL\Cache\QueryCacheProfile;
41			use Doctrine\DBAL\Configuration;
42			use Doctrine\DBAL\Driver;
43			use Doctrine\DBAL\Exception;
44			use Doctrine\DBAL\Exception\ConstraintViolationException;
45			use Doctrine\DBAL\Exception\NotNullConstraintViolationException;
46			use Doctrine\DBAL\Platforms\MySQLPlatform;
47			use Doctrine\DBAL\Platforms\OraclePlatform;
48			use Doctrine\DBAL\Platforms\PostgreSQL94Platform;
49			use Doctrine\DBAL\Platforms\SqlitePlatform;
50			use Doctrine\DBAL\Result;
51			use Doctrine\DBAL\Schema\Schema;
52			use Doctrine\DBAL\Statement;
53			use OC\DB\QueryBuilder\QueryBuilder;
54			use OC\SystemConfig;
55			use OCP\DB\QueryBuilder\IQueryBuilder;
56			use OCP\ILogger;
57			use OCP\PreConditionNotMetException;
58
59			class Connection extends \Doctrine\DBAL\Connection {
60			/** @var string */
61			protected $tablePrefix;
62
63			/** @var \OC\DB\Adapter $adapter */
64			protected $adapter;
65
66			/** @var SystemConfig */
67			private $systemConfig;
68
69			/** @var ILogger */
70			private $logger;
71
72			protected $lockedTable = null;
73
74			/** @var int */
75			protected $queriesBuilt = 0;
76
77			/** @var int */
78			protected $queriesExecuted = 0;
79
80			/**
81			* @throws Exception
82			*/
83			public function connect() {
84			try {
85			return parent::connect();
86			} catch (Exception $e) {
87			// throw a new exception to prevent leaking info from the stacktrace
88			throw new Exception('Failed to connect to the database: ' . $e->getMessage(), $e->getCode());
89			}
90			}
91
92			public function getStats(): array {
93			return [
94			'built' => $this->queriesBuilt,
95			'executed' => $this->queriesExecuted,
96			];
97			}
98
99			/**
100			* Returns a QueryBuilder for the connection.
101			*/
102			public function getQueryBuilder(): IQueryBuilder {
103			$this->queriesBuilt++;
104			return new QueryBuilder(
105			new ConnectionAdapter($this),
106			$this->systemConfig,
107			$this->logger
108			);
109			}
110
111			/**
112			* Gets the QueryBuilder for the connection.
113			*
114			* @return \Doctrine\DBAL\Query\QueryBuilder
115			* @deprecated please use $this->getQueryBuilder() instead
116			*/
117			public function createQueryBuilder() {
118			$backtrace = $this->getCallerBacktrace();
119			\OC::$server->getLogger()->debug('Doctrine QueryBuilder retrieved in {backtrace}', ['app' => 'core', 'backtrace' => $backtrace]);
120			$this->queriesBuilt++;
121			return parent::createQueryBuilder();
122			}
123
124			/**
125			* Gets the ExpressionBuilder for the connection.
126			*
127			* @return \Doctrine\DBAL\Query\Expression\ExpressionBuilder
128			* @deprecated please use $this->getQueryBuilder()->expr() instead
129			*/
130			public function getExpressionBuilder() {
131			$backtrace = $this->getCallerBacktrace();
132			\OC::$server->getLogger()->debug('Doctrine ExpressionBuilder retrieved in {backtrace}', ['app' => 'core', 'backtrace' => $backtrace]);
133			$this->queriesBuilt++;
134			return parent::getExpressionBuilder();
135			}
136
137			/**
138			* Get the file and line that called the method where `getCallerBacktrace()` was used
139			*
140			* @return string
141			*/
142			protected function getCallerBacktrace() {
143			$traces = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
144
145			// 0 is the method where we use `getCallerBacktrace`
146			// 1 is the target method which uses the method we want to log
147			if (isset($traces[1])) {
148			return $traces[1]['file'] . ':' . $traces[1]['line'];
149			}
150
151			return '';
152			}
153
154			/**
155			* @return string
156			*/
157			public function getPrefix() {
158			return $this->tablePrefix;
159			}
160
161			/**
162			* Initializes a new instance of the Connection class.
163			*
164			* @param array $params The connection parameters.
165			* @param \Doctrine\DBAL\Driver $driver
166			* @param \Doctrine\DBAL\Configuration $config
167			* @param \Doctrine\Common\EventManager $eventManager
168			* @throws \Exception
169			*/
170			public function __construct(array $params, Driver $driver, Configuration $config = null,
171			EventManager $eventManager = null) {
172			if (!isset($params['adapter'])) {
173			throw new \Exception('adapter not set');
174			}
175			if (!isset($params['tablePrefix'])) {
176			throw new \Exception('tablePrefix not set');
177			}
178			/**
179			* @psalm-suppress InternalMethod
180			*/
181			parent::__construct($params, $driver, $config, $eventManager);
182			$this->adapter = new $params['adapter']($this);
183			$this->tablePrefix = $params['tablePrefix'];
184
185			$this->systemConfig = \OC::$server->getSystemConfig();
186			$this->logger = \OC::$server->getLogger();
187			}
188
189			/**
190			* Prepares an SQL statement.
191			*
192			* @param string $statement The SQL statement to prepare.
193			* @param int $limit
194			* @param int $offset
195			*
196			* @return Statement The prepared statement.
197			* @throws Exception
198			*/
199			public function prepare($statement, $limit = null, $offset = null): Statement {
200			if ($limit === -1) {
201			$limit = null;
202			}
203			if (!is_null($limit)) {
204			$platform = $this->getDatabasePlatform();
205			$statement = $platform->modifyLimitQuery($statement, $limit, $offset);
206			}
207			$statement = $this->replaceTablePrefix($statement);
208			$statement = $this->adapter->fixupStatement($statement);
209
210			return parent::prepare($statement);
211			}
212
213			/**
214			* Executes an, optionally parametrized, SQL query.
215			*
216			* If the query is parametrized, a prepared statement is used.
217			* If an SQLLogger is configured, the execution is logged.
218			*
219			* @param string $sql The SQL query to execute.
220			* @param array $params The parameters to bind to the query, if any.
221			* @param array $types The types the previous parameters are in.
222			* @param \Doctrine\DBAL\Cache\QueryCacheProfile\|null $qcp The query cache profile, optional.
223			*
224			* @return Result The executed statement.
225			*
226			* @throws \Doctrine\DBAL\Exception
227			*/
228			public function executeQuery(string $sql, array $params = [], $types = [], QueryCacheProfile $qcp = null): Result {
229			$sql = $this->replaceTablePrefix($sql);
230			$sql = $this->adapter->fixupStatement($sql);
231			$this->queriesExecuted++;
232			return parent::executeQuery($sql, $params, $types, $qcp);
233			}
234
235			/**
236			* @throws Exception
237			*/
238			public function executeUpdate(string $sql, array $params = [], array $types = []): int {
239			$sql = $this->replaceTablePrefix($sql);
240			$sql = $this->adapter->fixupStatement($sql);
241			$this->queriesExecuted++;
242			return parent::executeUpdate($sql, $params, $types);
243			}
244
245			/**
246			* Executes an SQL INSERT/UPDATE/DELETE query with the given parameters
247			* and returns the number of affected rows.
248			*
249			* This method supports PDO binding types as well as DBAL mapping types.
250			*
251			* @param string $sql The SQL query.
252			* @param array $params The query parameters.
253			* @param array $types The parameter types.
254			*
255			* @return int The number of affected rows.
256			*
257			* @throws \Doctrine\DBAL\Exception
258			*/
259			public function executeStatement($sql, array $params = [], array $types = []): int {
260			$sql = $this->replaceTablePrefix($sql);
261			$sql = $this->adapter->fixupStatement($sql);
262			$this->queriesExecuted++;
263			return parent::executeStatement($sql, $params, $types);
264			}
265
266			/**
267			* Returns the ID of the last inserted row, or the last value from a sequence object,
268			* depending on the underlying driver.
269			*
270			* Note: This method may not return a meaningful or consistent result across different drivers,
271			* because the underlying database may not even support the notion of AUTO_INCREMENT/IDENTITY
272			* columns or sequences.
273			*
274			* @param string $seqName Name of the sequence object from which the ID should be returned.
275			*
276			* @return string the last inserted ID.
277			* @throws Exception
278			*/
279			public function lastInsertId($seqName = null) {
280			if ($seqName) {
281			$seqName = $this->replaceTablePrefix($seqName);
282			}
283			return $this->adapter->lastInsertId($seqName);
284			}
285
286			/**
287			* @internal
288			* @throws Exception
289			*/
290			public function realLastInsertId($seqName = null) {
291			return parent::lastInsertId($seqName);
292			}
293
294			/**
295			* Insert a row if the matching row does not exists. To accomplish proper race condition avoidance
296			* it is needed that there is also a unique constraint on the values. Then this method will
297			* catch the exception and return 0.
298			*
299			* @param string $table The table name (will replace PREFIX with the actual prefix)
300			* @param array $input data that should be inserted into the table (column name => value)
301			* @param array\|null $compare List of values that should be checked for "if not exists"
302			* If this is null or an empty array, all keys of $input will be compared
303			* Please note: text fields (clob) must not be used in the compare array
304			* @return int number of inserted rows
305			* @throws \Doctrine\DBAL\Exception
306			* @deprecated 15.0.0 - use unique index and "try { $db->insert() } catch (UniqueConstraintViolationException $e) {}" instead, because it is more reliable and does not have the risk for deadlocks - see https://github.com/nextcloud/server/pull/12371
307			*/
308			public function insertIfNotExist($table, $input, array $compare = null) {
309			return $this->adapter->insertIfNotExist($table, $input, $compare);
310			}
311
312			public function insertIgnoreConflict(string $table, array $values) : int {
313			return $this->adapter->insertIgnoreConflict($table, $values);
314			}
315
316			private function getType($value) {
317			if (is_bool($value)) {
318			return IQueryBuilder::PARAM_BOOL;
319			} elseif (is_int($value)) {
320			return IQueryBuilder::PARAM_INT;
321			} else {
322			return IQueryBuilder::PARAM_STR;
323			}
324			}
325
326			/**
327			* Insert or update a row value
328			*
329			* @param string $table
330			* @param array $keys (column name => value)
331			* @param array $values (column name => value)
332			* @param array $updatePreconditionValues ensure values match preconditions (column name => value)
333			* @return int number of new rows
334			* @throws \Doctrine\DBAL\Exception
335			* @throws PreConditionNotMetException
336			*/
337			public function setValues($table, array $keys, array $values, array $updatePreconditionValues = []) {
338			try {
339			$insertQb = $this->getQueryBuilder();
340			$insertQb->insert($table)
341			->values(
342			array_map(function ($value) use ($insertQb) {
343			return $insertQb->createNamedParameter($value, $this->getType($value));
344			}, array_merge($keys, $values))
345			);
346			return $insertQb->execute();
			0 ignored issues – show Bug Best Practice introduced 2021-01-08 14:13 UTC by Report Bug Copy Issue Report The expression `return $insertQb->execute()` returns the type `OC\DB\ResultAdapter` which is incompatible with the documented return type `integer`. Loading history...
347			} catch (NotNullConstraintViolationException $e) {
348			throw $e;
349			} catch (ConstraintViolationException $e) {
350			// value already exists, try update
351			$updateQb = $this->getQueryBuilder();
352			$updateQb->update($table);
353			foreach ($values as $name => $value) {
354			$updateQb->set($name, $updateQb->createNamedParameter($value, $this->getType($value)));
355			}
356			$where = $updateQb->expr()->andX();
357			$whereValues = array_merge($keys, $updatePreconditionValues);
358			foreach ($whereValues as $name => $value) {
359			if ($value === '') {
360			$where->add($updateQb->expr()->emptyString(
361			$name
362			));
363			} else {
364			$where->add($updateQb->expr()->eq(
365			$name,
366			$updateQb->createNamedParameter($value, $this->getType($value)),
367			$this->getType($value)
368			));
369			}
370			}
371			$updateQb->where($where);
372			$affected = $updateQb->execute();
373
374			if ($affected === 0 && !empty($updatePreconditionValues)) {
			0 ignored issues – show introduced 2020-06-09 09:22 UTC by Report Bug Copy Issue Report The condition `$affected === 0` is always `false`. Loading history...
375			throw new PreConditionNotMetException();
376			}
377
378			return 0;
379			}
380			}
381
382			/**
383			* Create an exclusive read+write lock on a table
384			*
385			* @param string $tableName
386			*
387			* @throws \BadMethodCallException When trying to acquire a second lock
388			* @throws Exception
389			* @since 9.1.0
390			*/
391			public function lockTable($tableName) {
392			if ($this->lockedTable !== null) {
393			throw new \BadMethodCallException('Can not lock a new table until the previous lock is released.');
394			}
395
396			$tableName = $this->tablePrefix . $tableName;
397			$this->lockedTable = $tableName;
398			$this->adapter->lockTable($tableName);
399			}
400
401			/**
402			* Release a previous acquired lock again
403			*
404			* @throws Exception
405			* @since 9.1.0
406			*/
407			public function unlockTable() {
408			$this->adapter->unlockTable();
409			$this->lockedTable = null;
410			}
411
412			/**
413			* returns the error code and message as a string for logging
414			* works with DoctrineException
415			* @return string
416			*/
417			public function getError() {
418			$msg = $this->errorCode() . ': ';
419			$errorInfo = $this->errorInfo();
420			if (!empty($errorInfo)) {
421			$msg .= 'SQLSTATE = '.$errorInfo[0] . ', ';
422			$msg .= 'Driver Code = '.$errorInfo[1] . ', ';
423			$msg .= 'Driver Message = '.$errorInfo[2];
424			}
425			return $msg;
426			}
427
428			public function errorCode() {
429			return -1;
430			}
431
432			public function errorInfo() {
433			return [];
434			}
435
436			/**
437			* Drop a table from the database if it exists
438			*
439			* @param string $table table name without the prefix
440			*
441			* @throws Exception
442			*/
443			public function dropTable($table) {
444			$table = $this->tablePrefix . trim($table);
445			$schema = $this->getSchemaManager();
446			if ($schema->tablesExist([$table])) {
447			$schema->dropTable($table);
448			}
449			}
450
451			/**
452			* Check if a table exists
453			*
454			* @param string $table table name without the prefix
455			*
456			* @return bool
457			* @throws Exception
458			*/
459			public function tableExists($table) {
460			$table = $this->tablePrefix . trim($table);
461			$schema = $this->getSchemaManager();
462			return $schema->tablesExist([$table]);
463			}
464
465			// internal use
466			/**
467			* @param string $statement
468			* @return string
469			*/
470			protected function replaceTablePrefix($statement) {
471			return str_replace('PREFIX', $this->tablePrefix, $statement);
472			}
473
474			/**
475			* Check if a transaction is active
476			*
477			* @return bool
478			* @since 8.2.0
479			*/
480			public function inTransaction() {
481			return $this->getTransactionNestingLevel() > 0;
482			}
483
484			/**
485			* Escape a parameter to be used in a LIKE query
486			*
487			* @param string $param
488			* @return string
489			*/
490			public function escapeLikeParameter($param) {
491			return addcslashes($param, '\\_%');
492			}
493
494			/**
495			* Check whether or not the current database support 4byte wide unicode
496			*
497			* @return bool
498			* @since 11.0.0
499			*/
500			public function supports4ByteText() {
501			if (!$this->getDatabasePlatform() instanceof MySQLPlatform) {
502			return true;
503			}
504			return $this->getParams()['charset'] === 'utf8mb4';
505			}
506
507
508			/**
509			* Create the schema of the connected database
510			*
511			* @return Schema
512			* @throws Exception
513			*/
514			public function createSchema() {
515			$migrator = $this->getMigrator();
516			return $migrator->createSchema();
517			}
518
519			/**
520			* Migrate the database to the given schema
521			*
522			* @param Schema $toSchema
523			*
524			* @throws Exception
525			*/
526			public function migrateToSchema(Schema $toSchema) {
527			$migrator = $this->getMigrator();
528			$migrator->migrate($toSchema);
529			}
530
531			private function getMigrator() {
532			// TODO properly inject those dependencies
533			$random = \OC::$server->getSecureRandom();
			0 ignored issues – show Unused Code introduced 2021-03-17 20:42 UTC by Report Bug Copy Issue Report The assignment to `$random` is dead and can be removed. Loading history...
534			$platform = $this->getDatabasePlatform();
535			$config = \OC::$server->getConfig();
536			$dispatcher = \OC::$server->getEventDispatcher();
537			if ($platform instanceof SqlitePlatform) {
538			return new SQLiteMigrator($this, $config, $dispatcher);
539			} elseif ($platform instanceof OraclePlatform) {
540			return new OracleMigrator($this, $config, $dispatcher);
541			} elseif ($platform instanceof MySQLPlatform) {
542			return new MySQLMigrator($this, $config, $dispatcher);
543			} elseif ($platform instanceof PostgreSQL94Platform) {
544			return new PostgreSqlMigrator($this, $config, $dispatcher);
545			} else {
546			return new Migrator($this, $config, $dispatcher);
547			}
548			}
549			}
550

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