nextcloud / server

lib/public/IDBConnection.php

Indentation +212 added lines, -212 removed lines

@@ -46,242 +46,242 @@
  */
 interface IDBConnection {
 
-	const ADD_MISSING_INDEXES_EVENT = self::class . '::ADD_MISSING_INDEXES';
-	const CHECK_MISSING_INDEXES_EVENT = self::class . '::CHECK_MISSING_INDEXES';
+    const ADD_MISSING_INDEXES_EVENT = self::class . '::ADD_MISSING_INDEXES';
+    const CHECK_MISSING_INDEXES_EVENT = self::class . '::CHECK_MISSING_INDEXES';
 
-	/**
-	 * Gets the QueryBuilder for the connection.
-	 *
-	 * @return \OCP\DB\QueryBuilder\IQueryBuilder
-	 * @since 8.2.0
-	 */
-	public function getQueryBuilder();
+    /**
+     * Gets the QueryBuilder for the connection.
+     *
+     * @return \OCP\DB\QueryBuilder\IQueryBuilder
+     * @since 8.2.0
+     */
+    public function getQueryBuilder();
 
-	/**
-	 * Used to abstract the ownCloud database access away
-	 * @param string $sql the sql query with ? placeholder for params
-	 * @param int $limit the maximum number of rows
-	 * @param int $offset from which row we want to start
-	 * @return \Doctrine\DBAL\Driver\Statement The prepared statement.
-	 * @since 6.0.0
-	 */
-	public function prepare($sql, $limit=null, $offset=null);
+    /**
+     * Used to abstract the ownCloud database access away
+     * @param string $sql the sql query with ? placeholder for params
+     * @param int $limit the maximum number of rows
+     * @param int $offset from which row we want to start
+     * @return \Doctrine\DBAL\Driver\Statement The prepared statement.
+     * @since 6.0.0
+     */
+    public function prepare($sql, $limit=null, $offset=null);
 
-	/**
-	 * Executes an, optionally parameterized, SQL query.
-	 *
-	 * If the query is parameterized, a prepared statement is used.
-	 * If an SQLLogger is configured, the execution is logged.
-	 *
-	 * @param string $query The SQL query to execute.
-	 * @param string[] $params The parameters to bind to the query, if any.
-	 * @param array $types The types the previous parameters are in.
-	 * @return \Doctrine\DBAL\Driver\Statement The executed statement.
-	 * @since 8.0.0
-	 */
-	public function executeQuery($query, array $params = array(), $types = array());
+    /**
+     * Executes an, optionally parameterized, SQL query.
+     *
+     * If the query is parameterized, a prepared statement is used.
+     * If an SQLLogger is configured, the execution is logged.
+     *
+     * @param string $query The SQL query to execute.
+     * @param string[] $params The parameters to bind to the query, if any.
+     * @param array $types The types the previous parameters are in.
+     * @return \Doctrine\DBAL\Driver\Statement The executed statement.
+     * @since 8.0.0
+     */
+    public function executeQuery($query, array $params = array(), $types = array());
 
-	/**
-	 * 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 $types The parameter types.
-	 * @return integer The number of affected rows.
-	 * @since 8.0.0
-	 */
-	public function executeUpdate($query, array $params = array(), array $types = array());
+    /**
+     * 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 $types The parameter types.
+     * @return integer The number of affected rows.
+     * @since 8.0.0
+     */
+    public function executeUpdate($query, array $params = array(), array $types = array());
 
-	/**
-	 * Used to get the id of the just inserted element
-	 * @param string $table the name of the table where we inserted the item
-	 * @return int the id of the inserted element
-	 * @since 6.0.0
-	 */
-	public function lastInsertId($table = null);
+    /**
+     * Used to get the id of the just inserted element
+     * @param string $table the name of the table where we inserted the item
+     * @return int the id of the inserted element
+     * @since 6.0.0
+     */
+    public function lastInsertId($table = null);
 
-	/**
-	 * 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\DBALException
-	 * @since 6.0.0 - parameter $compare was added in 8.1.0, return type changed from boolean in 8.1.0
-	 * @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);
+    /**
+     * 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\DBALException
+     * @since 6.0.0 - parameter $compare was added in 8.1.0, return type changed from boolean in 8.1.0
+     * @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);
 
-	/**
-	 * Insert or update a row value
-	 *
-	 * @param string $table
-	 * @param array $keys (column name => value)
-	 * @param array $values (column name => value)
-	 * @param array $updatePreconditionValues ensure values match preconditions (column name => value)
-	 * @return int number of new rows
-	 * @throws \Doctrine\DBAL\DBALException
-	 * @throws PreconditionNotMetException
-	 * @since 9.0.0
-	 */
-	public function setValues($table, array $keys, array $values, array $updatePreconditionValues = []);
+    /**
+     * Insert or update a row value
+     *
+     * @param string $table
+     * @param array $keys (column name => value)
+     * @param array $values (column name => value)
+     * @param array $updatePreconditionValues ensure values match preconditions (column name => value)
+     * @return int number of new rows
+     * @throws \Doctrine\DBAL\DBALException
+     * @throws PreconditionNotMetException
+     * @since 9.0.0
+     */
+    public function setValues($table, array $keys, array $values, array $updatePreconditionValues = []);
 
-	/**
-	 * Create an exclusive read+write lock on a table
-	 *
-	 * Important Note: Due to the nature how locks work on different DBs, it is
-	 * only possible to lock one table at a time. You should also NOT start a
-	 * transaction while holding a lock.
-	 *
-	 * @param string $tableName
-	 * @since 9.1.0
-	 */
-	public function lockTable($tableName);
+    /**
+     * Create an exclusive read+write lock on a table
+     *
+     * Important Note: Due to the nature how locks work on different DBs, it is
+     * only possible to lock one table at a time. You should also NOT start a
+     * transaction while holding a lock.
+     *
+     * @param string $tableName
+     * @since 9.1.0
+     */
+    public function lockTable($tableName);
 
-	/**
-	 * Release a previous acquired lock again
-	 *
-	 * @since 9.1.0
-	 */
-	public function unlockTable();
+    /**
+     * Release a previous acquired lock again
+     *
+     * @since 9.1.0
+     */
+    public function unlockTable();
 
-	/**
-	 * Start a transaction
-	 * @since 6.0.0
-	 */
-	public function beginTransaction();
+    /**
+     * Start a transaction
+     * @since 6.0.0
+     */
+    public function beginTransaction();
 
-	/**
-	 * Check if a transaction is active
-	 *
-	 * @return bool
-	 * @since 8.2.0
-	 */
-	public function inTransaction();
+    /**
+     * Check if a transaction is active
+     *
+     * @return bool
+     * @since 8.2.0
+     */
+    public function inTransaction();
 
-	/**
-	 * Commit the database changes done during a transaction that is in progress
-	 * @since 6.0.0
-	 */
-	public function commit();
+    /**
+     * Commit the database changes done during a transaction that is in progress
+     * @since 6.0.0
+     */
+    public function commit();
 
-	/**
-	 * Rollback the database changes done during a transaction that is in progress
-	 * @since 6.0.0
-	 */
-	public function rollBack();
+    /**
+     * Rollback the database changes done during a transaction that is in progress
+     * @since 6.0.0
+     */
+    public function rollBack();
 
-	/**
-	 * Gets the error code and message as a string for logging
-	 * @return string
-	 * @since 6.0.0
-	 */
-	public function getError();
+    /**
+     * Gets the error code and message as a string for logging
+     * @return string
+     * @since 6.0.0
+     */
+    public function getError();
 
-	/**
-	 * Fetch the SQLSTATE associated with the last database operation.
-	 *
-	 * @return integer The last error code.
-	 * @since 8.0.0
-	 */
-	public function errorCode();
+    /**
+     * Fetch the SQLSTATE associated with the last database operation.
+     *
+     * @return integer The last error code.
+     * @since 8.0.0
+     */
+    public function errorCode();
 
-	/**
-	 * Fetch extended error information associated with the last database operation.
-	 *
-	 * @return array The last error information.
-	 * @since 8.0.0
-	 */
-	public function errorInfo();
+    /**
+     * Fetch extended error information associated with the last database operation.
+     *
+     * @return array The last error information.
+     * @since 8.0.0
+     */
+    public function errorInfo();
 
-	/**
-	 * Establishes the connection with the database.
-	 *
-	 * @return bool
-	 * @since 8.0.0
-	 */
-	public function connect();
+    /**
+     * Establishes the connection with the database.
+     *
+     * @return bool
+     * @since 8.0.0
+     */
+    public function connect();
 
-	/**
-	 * Close the database connection
-	 * @since 8.0.0
-	 */
-	public function close();
+    /**
+     * Close the database connection
+     * @since 8.0.0
+     */
+    public function close();
 
-	/**
-	 * Quotes a given input parameter.
-	 *
-	 * @param mixed $input Parameter to be quoted.
-	 * @param int $type Type of the parameter.
-	 * @return string The quoted parameter.
-	 * @since 8.0.0
-	 */
-	public function quote($input, $type = IQueryBuilder::PARAM_STR);
+    /**
+     * Quotes a given input parameter.
+     *
+     * @param mixed $input Parameter to be quoted.
+     * @param int $type Type of the parameter.
+     * @return string The quoted parameter.
+     * @since 8.0.0
+     */
+    public function quote($input, $type = IQueryBuilder::PARAM_STR);
 
-	/**
-	 * Gets the DatabasePlatform instance that provides all the metadata about
-	 * the platform this driver connects to.
-	 *
-	 * @return \Doctrine\DBAL\Platforms\AbstractPlatform The database platform.
-	 * @since 8.0.0
-	 */
-	public function getDatabasePlatform();
+    /**
+     * Gets the DatabasePlatform instance that provides all the metadata about
+     * the platform this driver connects to.
+     *
+     * @return \Doctrine\DBAL\Platforms\AbstractPlatform The database platform.
+     * @since 8.0.0
+     */
+    public function getDatabasePlatform();
 
-	/**
-	 * Drop a table from the database if it exists
-	 *
-	 * @param string $table table name without the prefix
-	 * @since 8.0.0
-	 */
-	public function dropTable($table);
+    /**
+     * Drop a table from the database if it exists
+     *
+     * @param string $table table name without the prefix
+     * @since 8.0.0
+     */
+    public function dropTable($table);
 
-	/**
-	 * Check if a table exists
-	 *
-	 * @param string $table table name without the prefix
-	 * @return bool
-	 * @since 8.0.0
-	 */
-	public function tableExists($table);
+    /**
+     * Check if a table exists
+     *
+     * @param string $table table name without the prefix
+     * @return bool
+     * @since 8.0.0
+     */
+    public function tableExists($table);
 
-	/**
-	 * Escape a parameter to be used in a LIKE query
-	 *
-	 * @param string $param
-	 * @return string
-	 * @since 9.0.0
-	 */
-	public function escapeLikeParameter($param);
+    /**
+     * Escape a parameter to be used in a LIKE query
+     *
+     * @param string $param
+     * @return string
+     * @since 9.0.0
+     */
+    public function escapeLikeParameter($param);
 
-	/**
-	 * Check whether or not the current database support 4byte wide unicode
-	 *
-	 * @return bool
-	 * @since 11.0.0
-	 */
-	public function supports4ByteText();
+    /**
+     * Check whether or not the current database support 4byte wide unicode
+     *
+     * @return bool
+     * @since 11.0.0
+     */
+    public function supports4ByteText();
 
-	/**
-	 * Create the schema of the connected database
-	 *
-	 * @return Schema
-	 * @since 13.0.0
-	 */
-	public function createSchema();
+    /**
+     * Create the schema of the connected database
+     *
+     * @return Schema
+     * @since 13.0.0
+     */
+    public function createSchema();
 
-	/**
-	 * Migrate the database to the given schema
-	 *
-	 * @param Schema $toSchema
-	 * @since 13.0.0
-	 */
-	public function migrateToSchema(Schema $toSchema);
+    /**
+     * Migrate the database to the given schema
+     *
+     * @param Schema $toSchema
+     * @since 13.0.0
+     */
+    public function migrateToSchema(Schema $toSchema);
 }

lib/private/DB/AdapterSqlite.php

Indentation +61 added lines, -61 removed lines

@@ -31,70 +31,70 @@
 
 class AdapterSqlite extends Adapter {
 
-	/**
-	 * @param string $tableName
-	 */
-	public function lockTable($tableName) {
-		$this->conn->executeUpdate('BEGIN EXCLUSIVE TRANSACTION');
-	}
+    /**
+     * @param string $tableName
+     */
+    public function lockTable($tableName) {
+        $this->conn->executeUpdate('BEGIN EXCLUSIVE TRANSACTION');
+    }
 
-	public function unlockTable() {
-		$this->conn->executeUpdate('COMMIT TRANSACTION');
-	}
+    public function unlockTable() {
+        $this->conn->executeUpdate('COMMIT TRANSACTION');
+    }
 
-	public function fixupStatement($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('GREATEST(', 'MAX(', $statement);
-		$statement = str_ireplace( 'UNIX_TIMESTAMP()', 'strftime(\'%s\',\'now\')', $statement );
-		return $statement;
-	}
+    public function fixupStatement($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('GREATEST(', 'MAX(', $statement);
+        $statement = str_ireplace( 'UNIX_TIMESTAMP()', 'strftime(\'%s\',\'now\')', $statement );
+        return $statement;
+    }
 
-	/**
-	 * 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\DBALException
-	 * @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 $compare = null) {
-		if (empty($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 ";
+    /**
+     * 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\DBALException
+     * @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 $compare = null) {
+        if (empty($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, -5);
-		$query .= ')';
+        $inserts = array_values($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, -5);
+        $query .= ')';
 
-		try {
-			return $this->conn->executeUpdate($query, $inserts);
-		} catch (UniqueConstraintViolationException $e) {
-			// if this is thrown then a concurrent insert happened between the insert and the sub-select in the insert, that should have avoided it
-			// it's fine to ignore this then
-			//
-			// more discussions about this can be found at https://github.com/nextcloud/server/pull/12315
-			return 0;
-		}
-	}
+        try {
+            return $this->conn->executeUpdate($query, $inserts);
+        } catch (UniqueConstraintViolationException $e) {
+            // if this is thrown then a concurrent insert happened between the insert and the sub-select in the insert, that should have avoided it
+            // it's fine to ignore this then
+            //
+            // more discussions about this can be found at https://github.com/nextcloud/server/pull/12315
+            return 0;
+        }
+    }
 }

lib/private/DB/Adapter.php

Indentation +83 added lines, -83 removed lines

@@ -35,95 +35,95 @@
  */
 class Adapter {
 
-	/**
-	 * @var \OC\DB\Connection $conn
-	 */
-	protected $conn;
+    /**
+     * @var \OC\DB\Connection $conn
+     */
+    protected $conn;
 
-	public function __construct($conn) {
-		$this->conn = $conn;
-	}
+    public function __construct($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 $table name
+     * @return int id of last insert statement
+     */
+    public function lastInsertId($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;
-	}
+    /**
+     * @param string $statement that needs to be changed so the db can handle it
+     * @return string changed statement
+     */
+    public function fixupStatement($statement) {
+        return $statement;
+    }
 
-	/**
-	 * Create an exclusive read+write lock on a table
-	 *
-	 * @param string $tableName
-	 * @since 9.1.0
-	 */
-	public function lockTable($tableName) {
-		$this->conn->beginTransaction();
-		$this->conn->executeUpdate('LOCK TABLE `' .$tableName . '` IN EXCLUSIVE MODE');
-	}
+    /**
+     * Create an exclusive read+write lock on a table
+     *
+     * @param string $tableName
+     * @since 9.1.0
+     */
+    public function lockTable($tableName) {
+        $this->conn->beginTransaction();
+        $this->conn->executeUpdate('LOCK TABLE `' .$tableName . '` IN EXCLUSIVE MODE');
+    }
 
-	/**
-	 * Release a previous acquired lock again
-	 *
-	 * @since 9.1.0
-	 */
-	public function unlockTable() {
-		$this->conn->commit();
-	}
+    /**
+     * Release a previous acquired lock again
+     *
+     * @since 9.1.0
+     */
+    public function unlockTable() {
+        $this->conn->commit();
+    }
 
-	/**
-	 * 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\DBALException
-	 * @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 $compare = null) {
-		if (empty($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 ';
+    /**
+     * 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\DBALException
+     * @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 $compare = null) {
+        if (empty($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, -5);
-		$query .= ' HAVING COUNT(*) = 0';
+        $inserts = array_values($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, -5);
+        $query .= ' HAVING COUNT(*) = 0';
 
-		try {
-			return $this->conn->executeUpdate($query, $inserts);
-		} catch (UniqueConstraintViolationException $e) {
-			// if this is thrown then a concurrent insert happened between the insert and the sub-select in the insert, that should have avoided it
-			// it's fine to ignore this then
-			//
-			// more discussions about this can be found at https://github.com/nextcloud/server/pull/12315
-			return 0;
-		}
-	}
+        try {
+            return $this->conn->executeUpdate($query, $inserts);
+        } catch (UniqueConstraintViolationException $e) {
+            // if this is thrown then a concurrent insert happened between the insert and the sub-select in the insert, that should have avoided it
+            // it's fine to ignore this then
+            //
+            // more discussions about this can be found at https://github.com/nextcloud/server/pull/12315
+            return 0;
+        }
+    }
 }

lib/private/DB/Connection.php

Indentation +404 added lines, -404 removed lines

@@ -44,408 +44,408 @@
 use OCP\PreConditionNotMetException;
 
 class Connection extends ReconnectWrapper implements IDBConnection {
-	/**
-	 * @var string $tablePrefix
-	 */
-	protected $tablePrefix;
-
-	/**
-	 * @var \OC\DB\Adapter $adapter
-	 */
-	protected $adapter;
-
-	protected $lockedTable = null;
-
-	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(
-			$this,
-			\OC::$server->getSystemConfig(),
-			\OC::$server->getLogger()
-		);
-	}
-
-	/**
-	 * 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);
-
-		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. 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\DBALException
-	 * @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, $compare);
-	}
-
-	private function getType($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 $updatePreconditionValues ensure values match preconditions (column name => value)
-	 * @return int number of new rows
-	 * @throws \Doctrine\DBAL\DBALException
-	 * @throws PreConditionNotMetException
-	 * @suppress SqlInjectionChecker
-	 */
-	public function setValues($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 (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;
-		}
-	}
-
-	/**
-	 * Create an exclusive read+write lock on a table
-	 *
-	 * @param string $tableName
-	 * @throws \BadMethodCallException When trying to acquire a second lock
-	 * @since 9.1.0
-	 */
-	public function lockTable($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
-	 *
-	 * @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 = $this->errorInfo();
-		if (is_array($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;
-	}
-
-	/**
-	 * 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
-	 */
-	public function createSchema() {
-		$schemaManager = new MDB2SchemaManager($this);
-		$migrator = $schemaManager->getMigrator();
-		return $migrator->createSchema();
-	}
-
-	/**
-	 * Migrate the database to the given schema
-	 *
-	 * @param Schema $toSchema
-	 */
-	public function migrateToSchema(Schema $toSchema) {
-		$schemaManager = new MDB2SchemaManager($this);
-		$migrator = $schemaManager->getMigrator();
-		$migrator->migrate($toSchema);
-	}
+    /**
+     * @var string $tablePrefix
+     */
+    protected $tablePrefix;
+
+    /**
+     * @var \OC\DB\Adapter $adapter
+     */
+    protected $adapter;
+
+    protected $lockedTable = null;
+
+    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(
+            $this,
+            \OC::$server->getSystemConfig(),
+            \OC::$server->getLogger()
+        );
+    }
+
+    /**
+     * 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);
+
+        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. 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\DBALException
+     * @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, $compare);
+    }
+
+    private function getType($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 $updatePreconditionValues ensure values match preconditions (column name => value)
+     * @return int number of new rows
+     * @throws \Doctrine\DBAL\DBALException
+     * @throws PreConditionNotMetException
+     * @suppress SqlInjectionChecker
+     */
+    public function setValues($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 (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;
+        }
+    }
+
+    /**
+     * Create an exclusive read+write lock on a table
+     *
+     * @param string $tableName
+     * @throws \BadMethodCallException When trying to acquire a second lock
+     * @since 9.1.0
+     */
+    public function lockTable($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
+     *
+     * @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 = $this->errorInfo();
+        if (is_array($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;
+    }
+
+    /**
+     * 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
+     */
+    public function createSchema() {
+        $schemaManager = new MDB2SchemaManager($this);
+        $migrator = $schemaManager->getMigrator();
+        return $migrator->createSchema();
+    }
+
+    /**
+     * Migrate the database to the given schema
+     *
+     * @param Schema $toSchema
+     */
+    public function migrateToSchema(Schema $toSchema) {
+        $schemaManager = new MDB2SchemaManager($this);
+        $migrator = $schemaManager->getMigrator();
+        $migrator->migrate($toSchema);
+    }
 }