Enforced parameter and return value types in Statement classes

lib/Doctrine/DBAL/Cache/ArrayStatement.php

@@ -55,7 +55,7 @@ class ArrayStatement implements IteratorAggregate, ResultStatement
     /**
      * {@inheritdoc}
      */
-    public function columnCount()
+    public function columnCount() : int
     {
         return $this->columnCount;
     }
@@ -75,7 +75,7 @@ class ArrayStatement implements IteratorAggregate, ResultStatement
     /**
      * {@inheritdoc}
      */
-    public function setFetchMode($fetchMode, ...$args) : void
+    public function setFetchMode(int $fetchMode, ...$args) : void
     {
         if (count($args) > 0) {
             throw new InvalidArgumentException('Caching layer does not support 2nd/3rd argument to setFetchMode().');
@@ -97,7 +97,7 @@ class ArrayStatement implements IteratorAggregate, ResultStatement
     /**
      * {@inheritdoc}
      */
-    public function fetch($fetchMode = null, ...$args)
+    public function fetch(?int $fetchMode = null, ...$args)
     {
         if (! isset($this->data[$this->num])) {
             return false;
@@ -130,7 +130,7 @@ class ArrayStatement implements IteratorAggregate, ResultStatement
     /**
      * {@inheritdoc}
      */
-    public function fetchAll($fetchMode = null, ...$args)
+    public function fetchAll(?int $fetchMode = null, ...$args) : array
     {
         $rows = [];
         while ($row = $this->fetch($fetchMode, ...$args)) {
@@ -143,7 +143,7 @@ class ArrayStatement implements IteratorAggregate, ResultStatement
     /**
      * {@inheritdoc}
      */
-    public function fetchColumn($columnIndex = 0)
+    public function fetchColumn(int $columnIndex = 0)
     {
         $row = $this->fetch(FetchMode::NUMERIC);
 

lib/Doctrine/DBAL/Cache/QueryCacheProfile.php

@@ -26,39 +26,27 @@ class QueryCacheProfile
     /** @var string|null */
     private $cacheKey;
 
-    /**
-     * @param int         $lifetime
-     * @param string|null $cacheKey
-     */
-    public function __construct($lifetime = 0, $cacheKey = null, ?Cache $resultCache = null)
+    public function __construct(int $lifetime = 0, ?string $cacheKey = null, ?Cache $resultCache = null)
     {
         $this->lifetime          = $lifetime;
         $this->cacheKey          = $cacheKey;
         $this->resultCacheDriver = $resultCache;
     }
 
-    /**
-     * @return Cache|null
-     */
-    public function getResultCacheDriver()
+    public function getResultCacheDriver() : ?Cache
     {
         return $this->resultCacheDriver;
     }
 
-    /**
-     * @return int
-     */
-    public function getLifetime()
+    public function getLifetime() : int
     {
         return $this->lifetime;
     }
 
     /**
-     * @return string
-     *
      * @throws CacheException
      */
-    public function getCacheKey()
+    public function getCacheKey() : string
     {
         if ($this->cacheKey === null) {
             throw NoCacheKey::new();
@@ -70,14 +58,13 @@ class QueryCacheProfile
     /**
      * Generates the real cache key from query, params, types and connection parameters.
      *
-     * @param string         $query
      * @param mixed[]        $params
      * @param int[]|string[] $types
      * @param mixed[]        $connectionParams
      *
      * @return string[]
      */
-    public function generateCacheKeys($query, $params, $types, array $connectionParams = [])
+    public function generateCacheKeys(string $query, array $params, array $types, array $connectionParams = []) : array
     {
         $realCacheKey = 'query=' . $query .
             '&params=' . serialize($params) .
@@ -94,30 +81,17 @@ class QueryCacheProfile
         return [$cacheKey, $realCacheKey];
     }
 
-    /**
-     * @return \Doctrine\DBAL\Cache\QueryCacheProfile
-     */
-    public function setResultCacheDriver(Cache $cache)
+    public function setResultCacheDriver(Cache $cache) : self
     {
         return new QueryCacheProfile($this->lifetime, $this->cacheKey, $cache);
     }
 
-    /**
-     * @param string|null $cacheKey
-     *
-     * @return \Doctrine\DBAL\Cache\QueryCacheProfile
-     */
-    public function setCacheKey($cacheKey)
+    public function setCacheKey(?string $cacheKey) : self
     {
         return new QueryCacheProfile($this->lifetime, $cacheKey, $this->resultCacheDriver);
     }
 
-    /**
-     * @param int $lifetime
-     *
-     * @return \Doctrine\DBAL\Cache\QueryCacheProfile
-     */
-    public function setLifetime($lifetime)
+    public function setLifetime(int $lifetime) : self
     {
         return new QueryCacheProfile($lifetime, $this->cacheKey, $this->resultCacheDriver);
     }

lib/Doctrine/DBAL/Cache/ResultCacheStatement.php

@@ -60,12 +60,7 @@ class ResultCacheStatement implements IteratorAggregate, ResultStatement
     /** @var int */
     private $defaultFetchMode = FetchMode::MIXED;
 
-    /**
-     * @param string $cacheKey
-     * @param string $realKey
-     * @param int    $lifetime
-     */
-    public function __construct(ResultStatement $stmt, Cache $resultCache, $cacheKey, $realKey, $lifetime)
+    public function __construct(ResultStatement $stmt, Cache $resultCache, string $cacheKey, string $realKey, int $lifetime)
     {
         $this->statement   = $stmt;
         $this->resultCache = $resultCache;
@@ -98,7 +93,7 @@ class ResultCacheStatement implements IteratorAggregate, ResultStatement
     /**
      * {@inheritdoc}
      */
-    public function columnCount()
+    public function columnCount() : int
     {
         return $this->statement->columnCount();
     }
@@ -106,7 +101,7 @@ class ResultCacheStatement implements IteratorAggregate, ResultStatement
     /**
      * {@inheritdoc}
      */
-    public function setFetchMode($fetchMode, ...$args) : void
+    public function setFetchMode(int $fetchMode, ...$args) : void
     {
         $this->defaultFetchMode = $fetchMode;
     }
@@ -124,7 +119,7 @@ class ResultCacheStatement implements IteratorAggregate, ResultStatement
     /**
      * {@inheritdoc}
      */
-    public function fetch($fetchMode = null, ...$args)
+    public function fetch(?int $fetchMode = null, ...$args)
     {
         if ($this->data === null) {
             $this->data = [];
@@ -164,7 +159,7 @@ class ResultCacheStatement implements IteratorAggregate, ResultStatement
     /**
      * {@inheritdoc}
      */
-    public function fetchAll($fetchMode = null, ...$args)
+    public function fetchAll(?int $fetchMode = null, ...$args) : array
     {
         $data = $this->statement->fetchAll($fetchMode, ...$args);
 
@@ -183,7 +178,7 @@ class ResultCacheStatement implements IteratorAggregate, ResultStatement
     /**
      * {@inheritdoc}
      */
-    public function fetchColumn($columnIndex = 0)
+    public function fetchColumn(int $columnIndex = 0)
     {
         $row = $this->fetch(FetchMode::NUMERIC);
 

lib/Doctrine/DBAL/Driver/IBMDB2/DB2Statement.php

@@ -22,6 +22,7 @@ use const DB2_PARAM_FILE;
 use const DB2_PARAM_IN;
 use function array_change_key_case;
 use function array_key_exists;
+use function assert;
 use function count;
 use function db2_bind_param;
 use function db2_execute;
@@ -36,6 +37,7 @@ use function error_get_last;
 use function fclose;
 use function fwrite;
 use function gettype;
+use function is_int;
 use function is_object;
 use function is_resource;
 use function is_string;
@@ -89,7 +91,7 @@ class DB2Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function bindValue($param, $value, $type = ParameterType::STRING) : void
+    public function bindValue($param, $value, int $type = ParameterType::STRING) : void
     {
         $this->bindParam($param, $value, $type);
     }
@@ -97,29 +99,31 @@ class DB2Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null) : void
+    public function bindParam($param, &$variable, int $type = ParameterType::STRING, ?int $length = null) : void
     {
+        assert(is_int($param));
+
         switch ($type) {
             case ParameterType::INTEGER:
-                $this->bind($column, $variable, DB2_PARAM_IN, DB2_LONG);
+                $this->bind($param, $variable, DB2_PARAM_IN, DB2_LONG);
                 break;
 
             case ParameterType::LARGE_OBJECT:
-                if (isset($this->lobs[$column])) {
-                    [, $handle] = $this->lobs[$column];
+                if (isset($this->lobs[$param])) {
+                    [, $handle] = $this->lobs[$param];
                     fclose($handle);
                 }
 
                 $handle = $this->createTemporaryFile();
                 $path   = stream_get_meta_data($handle)['uri'];
 
-                $this->bind($column, $path, DB2_PARAM_FILE, DB2_BINARY);
+                $this->bind($param, $path, DB2_PARAM_FILE, DB2_BINARY);
 
-                $this->lobs[$column] = [&$variable, $handle];
+                $this->lobs[$param] = [&$variable, $handle];
                 break;
 
             default:
-                $this->bind($column, $variable, DB2_PARAM_IN, DB2_CHAR);
+                $this->bind($param, $variable, DB2_PARAM_IN, DB2_CHAR);
                 break;
         }
     }
@@ -130,7 +134,7 @@ class DB2Statement implements IteratorAggregate, Statement
      *
      * @throws DB2Exception
      */
-    private function bind($position, &$variable, int $parameterType, int $dataType) : void
+    private function bind(int $position, &$variable, int $parameterType, int $dataType) : void
     {
         $this->bindParam[$position] =& $variable;
 
@@ -158,7 +162,7 @@ class DB2Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function columnCount()
+    public function columnCount() : int
     {
         return db2_num_fields($this->stmt) ?: 0;
     }
@@ -166,7 +170,7 @@ class DB2Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function execute($params = null) : void
+    public function execute(?array $params = null) : void
     {
         if ($params === null) {
             ksort($this->bindParam);
@@ -206,7 +210,7 @@ class DB2Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function setFetchMode($fetchMode, ...$args) : void
+    public function setFetchMode(int $fetchMode, ...$args) : void
     {
         $this->defaultFetchMode = $fetchMode;
 
@@ -232,7 +236,7 @@ class DB2Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetch($fetchMode = null, ...$args)
+    public function fetch(?int $fetchMode = null, ...$args)
     {
         // do not try fetching from the statement if it's not expected to contain result
         // in order to prevent exceptional situation
@@ -282,7 +286,7 @@ class DB2Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchAll($fetchMode = null, ...$args)
+    public function fetchAll(?int $fetchMode = null, ...$args) : array
     {
         $rows = [];
 
@@ -309,7 +313,7 @@ class DB2Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchColumn($columnIndex = 0)
+    public function fetchColumn(int $columnIndex = 0)
     {
         $row = $this->fetch(FetchMode::NUMERIC);
 
@@ -339,11 +343,9 @@ class DB2Statement implements IteratorAggregate, Statement
      * @param string|object $destinationClass Name of the class or class instance to cast to.
      * @param mixed[]       $ctorArgs         Arguments to use for constructing the destination class instance.
      *
-     * @return object
-     *
      * @throws DB2Exception
      */
-    private function castObject(stdClass $sourceObject, $destinationClass, array $ctorArgs = [])
+    private function castObject(stdClass $sourceObject, $destinationClass, array $ctorArgs = []) : object
     {
         if (! is_string($destinationClass)) {
             if (! is_object($destinationClass)) {

lib/Doctrine/DBAL/Driver/Mysqli/MysqliStatement.php

@@ -80,15 +80,13 @@ class MysqliStatement implements IteratorAggregate, Statement
     private $result = false;
 
     /**
-     * @param string $prepareString
-     *
      * @throws MysqliException
      */
-    public function __construct(mysqli $conn, $prepareString)
+    public function __construct(mysqli $conn, string $sql)
     {
         $this->_conn = $conn;
 
-        $stmt = $conn->prepare($prepareString);
+        $stmt = $conn->prepare($sql);
 
         if ($stmt === false) {
             throw ConnectionError::new($this->_conn);
@@ -108,22 +106,22 @@ class MysqliStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null) : void
+    public function bindParam($param, &$variable, int $type = ParameterType::STRING, ?int $length = null) : void
     {
-        assert(is_int($column));
+        assert(is_int($param));
 
         if (! isset(self::$_paramTypeMap[$type])) {
             throw UnknownType::new($type);
         }
 
-        $this->_bindedValues[$column] =& $variable;
-        $this->types[$column - 1]     = self::$_paramTypeMap[$type];
+        $this->_bindedValues[$param] =& $variable;
+        $this->types[$param - 1]     = self::$_paramTypeMap[$type];
     }
 
     /**
      * {@inheritdoc}
      */
-    public function bindValue($param, $value, $type = ParameterType::STRING) : void
+    public function bindValue($param, $value, int $type = ParameterType::STRING) : void
     {
         assert(is_int($param));
 
@@ -139,7 +137,7 @@ class MysqliStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function execute($params = null) : void
+    public function execute(?array $params = null) : void
     {
         if ($params !== null && count($params) > 0) {
             if (! $this->bindUntypedValues($params)) {
@@ -209,7 +207,7 @@ class MysqliStatement implements IteratorAggregate, Statement
      *
      * @throws DriverException
      */
-    private function bindTypedParameters()
+    private function bindTypedParameters() : void
     {
         $streams = $values = [];
         $types   = $this->types;
@@ -245,9 +243,11 @@ class MysqliStatement implements IteratorAggregate, Statement
     /**
      * Handle $this->_longData after regular query parameters have been bound
      *
+     * @param resource[] $streams
+     *
      * @throws MysqliException
      */
-    private function sendLongData($streams)
+    private function sendLongData(array $streams) : void
     {
         foreach ($streams as $paramNr => $stream) {
             while (! feof($stream)) {
@@ -268,10 +268,8 @@ class MysqliStatement implements IteratorAggregate, Statement
      * Binds a array of values to bound parameters.
      *
      * @param mixed[] $values
-     *
-     * @return bool
      */
-    private function bindUntypedValues(array $values)
+    private function bindUntypedValues(array $values) : bool
     {
         $params = [];
         $types  = str_repeat('s', count($values));
@@ -305,7 +303,7 @@ class MysqliStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetch($fetchMode = null, ...$args)
+    public function fetch(?int $fetchMode = null, ...$args)
     {
         // do not try fetching from the statement if it's not expected to contain result
         // in order to prevent exceptional situation
@@ -355,7 +353,7 @@ class MysqliStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchAll($fetchMode = null, ...$args)
+    public function fetchAll(?int $fetchMode = null, ...$args) : array
     {
         $fetchMode = $fetchMode ?: $this->_defaultFetchMode;
 
@@ -377,7 +375,7 @@ class MysqliStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchColumn($columnIndex = 0)
+    public function fetchColumn(int $columnIndex = 0)
     {
         $row = $this->fetch(FetchMode::NUMERIC);
 
@@ -416,7 +414,7 @@ class MysqliStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function columnCount()
+    public function columnCount() : int
     {
         return $this->_stmt->field_count;
     }
@@ -424,7 +422,7 @@ class MysqliStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function setFetchMode($fetchMode, ...$args) : void
+    public function setFetchMode(int $fetchMode, ...$args) : void
     {
         $this->_defaultFetchMode = $fetchMode;
     }

lib/Doctrine/DBAL/Driver/OCI8/OCI8Statement.php

@@ -103,7 +103,7 @@ class OCI8Statement implements IteratorAggregate, Statement
      * @param resource $dbh   The connection handle.
      * @param string   $query The SQL query.
      */
-    public function __construct($dbh, $query, OCI8Connection $conn)
+    public function __construct($dbh, string $query, OCI8Connection $conn)
     {
         [$query, $paramMap] = self::convertPositionalToNamedPlaceholders($query);
 
@@ -137,14 +137,14 @@ class OCI8Statement implements IteratorAggregate, Statement
      * @todo extract into utility class in Doctrine\DBAL\Util namespace
      * @todo review and test for lost spaces. we experienced missing spaces with oci8 in some sql statements.
      */
-    public static function convertPositionalToNamedPlaceholders($statement)
+    public static function convertPositionalToNamedPlaceholders(string $statement) : array
     {
         $fragmentOffset          = $tokenOffset = 0;
         $fragments               = $paramMap = [];
         $currentLiteralDelimiter = null;
 
         do {
-            if (! $currentLiteralDelimiter) {
+            if ($currentLiteralDelimiter === null) {
                 $result = self::findPlaceholderOrOpeningQuote(
                     $statement,
                     $tokenOffset,
@@ -175,23 +175,23 @@ class OCI8Statement implements IteratorAggregate, Statement
      * Finds next placeholder or opening quote.
      *
      * @param string      $statement               The SQL statement to parse
-     * @param string             $tokenOffset             The offset to start searching from
+     * @param int         $tokenOffset             The offset to start searching from
      * @param int         $fragmentOffset          The offset to build the next fragment from
      * @param string[]    $fragments               Fragments of the original statement not containing placeholders
      * @param string|null $currentLiteralDelimiter The delimiter of the current string literal
      *                                             or NULL if not currently in a literal
-     * @param array<int, string> $paramMap                Mapping of the original parameter positions to their named replacements
+     * @param string[]    $paramMap                Mapping of the original parameter positions to their named replacements
      *
      * @return bool Whether the token was found
      */
     private static function findPlaceholderOrOpeningQuote(
-        $statement,
-        &$tokenOffset,
-        &$fragmentOffset,
-        &$fragments,
-        &$currentLiteralDelimiter,
-        &$paramMap
-    ) {
+        string $statement,
+        int &$tokenOffset,
+        int &$fragmentOffset,
+        array &$fragments,
+        ?string &$currentLiteralDelimiter,
+        array &$paramMap
+    ) : bool {
         $token = self::findToken($statement, $tokenOffset, '/[?\'"]/');
 
         if (! $token) {
@@ -220,16 +220,16 @@ class OCI8Statement implements IteratorAggregate, Statement
      * Finds closing quote
      *
      * @param string $statement               The SQL statement to parse
-     * @param string $tokenOffset             The offset to start searching from
+     * @param int    $tokenOffset             The offset to start searching from
      * @param string $currentLiteralDelimiter The delimiter of the current string literal
      *
      * @return bool Whether the token was found
      */
     private static function findClosingQuote(
-        $statement,
-        &$tokenOffset,
-        &$currentLiteralDelimiter
-    ) {
+        string $statement,
+        int &$tokenOffset,
+        string &$currentLiteralDelimiter
+    ) : bool {
         $token = self::findToken(
             $statement,
             $tokenOffset,
@@ -240,7 +240,7 @@ class OCI8Statement implements IteratorAggregate, Statement
             return false;
         }
 
-        $currentLiteralDelimiter = false;
+        $currentLiteralDelimiter = null;
         ++$tokenOffset;
 
         return true;
@@ -256,7 +256,7 @@ class OCI8Statement implements IteratorAggregate, Statement
      *
      * @return string|null Token or NULL if not found
      */
-    private static function findToken($statement, &$offset, $regex)
+    private static function findToken(string $statement, int &$offset, string $regex) : ?string
     {
         if (preg_match($regex, $statement, $matches, PREG_OFFSET_CAPTURE, $offset)) {
             $offset = $matches[0][1];
@@ -270,7 +270,7 @@ class OCI8Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function bindValue($param, $value, $type = ParameterType::STRING) : void
+    public function bindValue($param, $value, int $type = ParameterType::STRING) : void
     {
         $this->bindParam($param, $value, $type, null);
     }
@@ -278,9 +278,9 @@ class OCI8Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null) : void
+    public function bindParam($param, &$variable, int $type = ParameterType::STRING, ?int $length = null) : void
     {
-        $column = $this->_paramMap[$column];
+        $param = $this->_paramMap[$param];
 
         if ($type === ParameterType::LARGE_OBJECT) {
             $lob = oci_new_descriptor($this->_dbh, OCI_D_LOB);
@@ -293,11 +293,11 @@ class OCI8Statement implements IteratorAggregate, Statement
             $variable =& $lob;
         }
 
-        $this->boundValues[$column] =& $variable;
+        $this->boundValues[$param] =& $variable;
 
         if (! oci_bind_by_name(
             $this->_sth,
-            $column,
+            $param,
             $variable,
             $length ?? -1,
             $this->convertParameterType($type)
@@ -341,7 +341,7 @@ class OCI8Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function columnCount()
+    public function columnCount() : int
     {
         return oci_num_fields($this->_sth) ?: 0;
     }
@@ -349,7 +349,7 @@ class OCI8Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function execute($params = null) : void
+    public function execute(?array $params = null) : void
     {
         if ($params) {
             $hasZeroIndex = array_key_exists(0, $params);
@@ -376,7 +376,7 @@ class OCI8Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function setFetchMode($fetchMode, ...$args) : void
+    public function setFetchMode(int $fetchMode, ...$args) : void
     {
         $this->_defaultFetchMode = $fetchMode;
     }
@@ -392,7 +392,7 @@ class OCI8Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetch($fetchMode = null, ...$args)
+    public function fetch(?int $fetchMode = null, ...$args)
     {
         // do not try fetching from the statement if it's not expected to contain result
         // in order to prevent exceptional situation
@@ -423,7 +423,7 @@ class OCI8Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchAll($fetchMode = null, ...$args)
+    public function fetchAll(?int $fetchMode = null, ...$args) : array
     {
         $fetchMode = $fetchMode ?: $this->_defaultFetchMode;
 
@@ -477,7 +477,7 @@ class OCI8Statement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchColumn($columnIndex = 0)
+    public function fetchColumn(int $columnIndex = 0)
     {
         // do not try fetching from the statement if it's not expected to contain result
         // in order to prevent exceptional situation

lib/Doctrine/DBAL/Driver/PDOSqlsrv/Statement.php

@@ -16,7 +16,7 @@ class Statement extends PDOStatement
     /**
      * {@inheritdoc}
      */
-    public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null, $driverOptions = null) : void
+    public function bindParam($param, &$variable, int $type = ParameterType::STRING, ?int $length = null, $driverOptions = null) : void
     {
         if (($type === ParameterType::LARGE_OBJECT || $type === ParameterType::BINARY)
             && $driverOptions === null
@@ -24,13 +24,13 @@ class Statement extends PDOStatement
             $driverOptions = PDO::SQLSRV_ENCODING_BINARY;
         }
 
-        parent::bindParam($column, $variable, $type, $length, $driverOptions);
+        parent::bindParam($param, $variable, $type, $length, $driverOptions);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function bindValue($param, $value, $type = ParameterType::STRING) : void
+    public function bindValue($param, $value, int $type = ParameterType::STRING) : void
     {
         $this->bindParam($param, $value, $type);
     }

lib/Doctrine/DBAL/Driver/PDOStatement.php

@@ -53,7 +53,7 @@ class PDOStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function setFetchMode($fetchMode, ...$args) : void
+    public function setFetchMode(int $fetchMode, ...$args) : void
     {
         $fetchMode = $this->convertFetchMode($fetchMode);
 
@@ -67,7 +67,7 @@ class PDOStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function bindValue($param, $value, $type = ParameterType::STRING) : void
+    public function bindValue($param, $value, int $type = ParameterType::STRING) : void
     {
         $type = $this->convertParamType($type);
 
@@ -81,7 +81,7 @@ class PDOStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null, $driverOptions = null) : void
+    public function bindParam($param, &$variable, int $type = ParameterType::STRING, ?int $length = null, $driverOptions = null) : void
     {
         $type            = $this->convertParamType($type);
         $extraParameters = array_slice(func_get_args(), 3);
@@ -91,7 +91,7 @@ class PDOStatement implements IteratorAggregate, Statement
         }
 
         try {
-            $this->stmt->bindParam($column, $variable, $type, ...$extraParameters);
+            $this->stmt->bindParam($param, $variable, $type, ...$extraParameters);
         } catch (\PDOException $exception) {
             throw new PDOException($exception);
         }
@@ -108,7 +108,7 @@ class PDOStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function columnCount()
+    public function columnCount() : int
     {
         return $this->stmt->columnCount();
     }
@@ -116,7 +116,7 @@ class PDOStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function execute($params = null) : void
+    public function execute(?array $params = null) : void
     {
         try {
             $this->stmt->execute($params);
@@ -136,7 +136,7 @@ class PDOStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetch($fetchMode = null, ...$args)
+    public function fetch(?int $fetchMode = null, ...$args)
     {
         try {
             if ($fetchMode === null) {
@@ -154,7 +154,7 @@ class PDOStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchAll($fetchMode = null, ...$args)
+    public function fetchAll(?int $fetchMode = null, ...$args) : array
     {
         try {
             if ($fetchMode === null) {
@@ -177,7 +177,7 @@ class PDOStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchColumn($columnIndex = 0)
+    public function fetchColumn(int $columnIndex = 0)
     {
         try {
             $value = $this->stmt->fetchColumn($columnIndex);

lib/Doctrine/DBAL/Driver/ResultStatement.php

@@ -20,10 +20,10 @@ interface ResultStatement extends Traversable
      * Returns the number of columns in the result set
      *
      * @return int The number of columns in the result set represented
-     *                 by the PDOStatement object. If there is no result set,
+     *             by the statement. If there is no result set,
      *             this method should return 0.
      */
-    public function columnCount();
+    public function columnCount() : int;
 
     /**
      * Returns the number of rows affected by the last DELETE, INSERT, or UPDATE statement
@@ -43,7 +43,7 @@ interface ResultStatement extends Traversable
      *                         The value must be one of the {@link \Doctrine\DBAL\FetchMode} constants.
      * @param mixed ...$args   Optional mode-specific arguments (see {@link self::fetchAll()}).
      */
-    public function setFetchMode($fetchMode, ...$args) : void;
+    public function setFetchMode(int $fetchMode, ...$args) : void;
 
     /**
      * Returns the next row of a result set.
@@ -56,7 +56,7 @@ interface ResultStatement extends Traversable
      * @return mixed The return value of this method on success depends on the fetch mode. In all cases, FALSE is
      *               returned on failure.
      */
-    public function fetch($fetchMode = null, ...$args);
+    public function fetch(?int $fetchMode = null, ...$args);
 
     /**
      * Returns an array containing all of the result set rows.
@@ -73,7 +73,7 @@ interface ResultStatement extends Traversable
      *
      * @return mixed[]
      */
-    public function fetchAll($fetchMode = null, ...$args);
+    public function fetchAll(?int $fetchMode = null, ...$args) : array;
 
     /**
      * Returns a single column from the next row of a result set or FALSE if there are no more rows.
@@ -83,5 +83,5 @@ interface ResultStatement extends Traversable
      *
      * @return mixed|false A single column in the next row of a result set, or FALSE if there are no more rows.
      */
-    public function fetchColumn($columnIndex = 0);
+    public function fetchColumn(int $columnIndex = 0);
 }

lib/Doctrine/DBAL/Driver/SQLAnywhere/SQLAnywhereStatement.php

@@ -16,6 +16,7 @@ use ReflectionObject;
 use stdClass;
 use const SASQL_BOTH;
 use function array_key_exists;
+use function assert;
 use function count;
 use function func_get_args;
 use function is_array;
@@ -70,7 +71,7 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
      *
      * @throws SQLAnywhereException
      */
-    public function __construct($conn, $sql)
+    public function __construct($conn, string $sql)
     {
         if (! is_resource($conn)) {
             throw new SQLAnywhereException(sprintf(
@@ -92,8 +93,10 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
      *
      * @throws SQLAnywhereException
      */
-    public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null) : void
+    public function bindParam($param, &$variable, int $type = ParameterType::STRING, ?int $length = null) : void
     {
+        assert(is_int($param));
+
         switch ($type) {
             case ParameterType::INTEGER:
             case ParameterType::BOOLEAN:
@@ -114,9 +117,9 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
                 throw new SQLAnywhereException(sprintf('Unknown type %d.', $type));
         }
 
-        $this->boundValues[$column] =& $variable;
+        $this->boundValues[$param] =& $variable;
 
-        if (! sasql_stmt_bind_param_ex($this->stmt, $column - 1, $variable, $type, $variable === null)) {
+        if (! sasql_stmt_bind_param_ex($this->stmt, $param - 1, $variable, $type, $variable === null)) {
             throw SQLAnywhereException::fromSQLAnywhereError($this->conn, $this->stmt);
         }
     }
@@ -124,7 +127,7 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function bindValue($param, $value, $type = ParameterType::STRING) : void
+    public function bindValue($param, $value, int $type = ParameterType::STRING) : void
     {
         $this->bindParam($param, $value, $type);
     }
@@ -140,7 +143,7 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function columnCount()
+    public function columnCount() : int
     {
         return sasql_stmt_field_count($this->stmt);
     }
@@ -150,7 +153,7 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
      *
      * @throws SQLAnywhereException
      */
-    public function execute($params = null) : void
+    public function execute(?array $params = null) : void
     {
         if (is_array($params)) {
             $hasZeroIndex = array_key_exists(0, $params);
@@ -176,7 +179,7 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
      *
      * @throws SQLAnywhereException
      */
-    public function fetch($fetchMode = null, ...$args)
+    public function fetch(?int $fetchMode = null, ...$args)
     {
         if (! is_resource($this->result)) {
             return false;
@@ -225,7 +228,7 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchAll($fetchMode = null, ...$args)
+    public function fetchAll(?int $fetchMode = null, ...$args) : array
     {
         $rows = [];
 
@@ -254,7 +257,7 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchColumn($columnIndex = 0)
+    public function fetchColumn(int $columnIndex = 0)
     {
         $row = $this->fetch(FetchMode::NUMERIC);
 
@@ -265,6 +268,8 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
         if (! array_key_exists($columnIndex, $row)) {
             throw InvalidColumnIndex::new($columnIndex, count($row));
         }
+
+        return $row[$columnIndex];
     }
 
     /**
@@ -286,7 +291,7 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function setFetchMode($fetchMode, ...$args) : void
+    public function setFetchMode(int $fetchMode, ...$args) : void
     {
         $this->defaultFetchMode = $fetchMode;
 
@@ -308,11 +313,9 @@ class SQLAnywhereStatement implements IteratorAggregate, Statement
      * @param string|object $destinationClass Name of the class or class instance to cast to.
      * @param mixed[]       $ctorArgs         Arguments to use for constructing the destination class instance.
      *
-     * @return object
-     *
      * @throws SQLAnywhereException
      */
-    private function castObject(stdClass $sourceObject, $destinationClass, array $ctorArgs = [])
+    private function castObject(stdClass $sourceObject, $destinationClass, array $ctorArgs = []) : object
     {
         if (! is_string($destinationClass)) {
             if (! is_object($destinationClass)) {

lib/Doctrine/DBAL/Driver/SQLSrv/SQLSrvStatement.php

@@ -16,10 +16,10 @@ use const SQLSRV_FETCH_BOTH;
 use const SQLSRV_FETCH_NUMERIC;
 use const SQLSRV_PARAM_IN;
 use function array_key_exists;
+use function assert;
 use function count;
 use function in_array;
 use function is_int;
-use function is_numeric;
 use function sqlsrv_execute;
 use function sqlsrv_fetch;
 use function sqlsrv_fetch_array;
@@ -129,9 +129,8 @@ class SQLSrvStatement implements IteratorAggregate, Statement
 
     /**
      * @param resource $conn
-     * @param string   $sql
      */
-    public function __construct($conn, $sql, ?LastInsertId $lastInsertId = null)
+    public function __construct($conn, string $sql, ?LastInsertId $lastInsertId = null)
     {
         $this->conn = $conn;
         $this->sql  = $sql;
@@ -147,13 +146,9 @@ class SQLSrvStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function bindValue($param, $value, $type = ParameterType::STRING) : void
+    public function bindValue($param, $value, int $type = ParameterType::STRING) : void
     {
-        if (! is_numeric($param)) {
-            throw new SQLSrvException(
-                'sqlsrv does not support named parameters to queries, use question mark (?) placeholders instead.'
-            );
-        }
+        assert(is_int($param));
 
         $this->variables[$param] = $value;
         $this->types[$param]     = $type;
@@ -162,14 +157,12 @@ class SQLSrvStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null) : void
+    public function bindParam($param, &$variable, int $type = ParameterType::STRING, ?int $length = null) : void
     {
-        if (! is_numeric($column)) {
-            throw new SQLSrvException('sqlsrv does not support named parameters to queries, use question mark (?) placeholders instead.');
-        }
+        assert(is_int($param));
 
-        $this->variables[$column] =& $variable;
-        $this->types[$column]     = $type;
+        $this->variables[$param] =& $variable;
+        $this->types[$param]     = $type;
 
         // unset the statement resource if it exists as the new one will need to be bound to the new variable
         $this->stmt = null;
@@ -189,7 +182,7 @@ class SQLSrvStatement implements IteratorAggregate, Statement
         // @link http://php.net/manual/en/pdostatement.closecursor.php
         // @link https://github.com/php/php-src/blob/php-7.0.11/ext/pdo/pdo_stmt.c#L2075
         // deliberately do not consider multiple result sets, since doctrine/dbal doesn't support them
-        while (sqlsrv_fetch($this->stmt)) {
+        while (sqlsrv_fetch($this->stmt) !== false) {
         }
 
         $this->result = false;
@@ -198,7 +191,7 @@ class SQLSrvStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function columnCount()
+    public function columnCount() : int
     {
         if ($this->stmt === null) {
             return 0;
@@ -210,7 +203,7 @@ class SQLSrvStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function execute($params = null) : void
+    public function execute(?array $params = null) : void
     {
         if ($params) {
             $hasZeroIndex = array_key_exists(0, $params);
@@ -289,7 +282,7 @@ class SQLSrvStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function setFetchMode($fetchMode, ...$args) : void
+    public function setFetchMode(int $fetchMode, ...$args) : void
     {
         $this->defaultFetchMode = $fetchMode;
 
@@ -317,7 +310,7 @@ class SQLSrvStatement implements IteratorAggregate, Statement
      *
      * @throws SQLSrvException
      */
-    public function fetch($fetchMode = null, ...$args)
+    public function fetch(?int $fetchMode = null, ...$args)
     {
         // do not try fetching from the statement if it's not expected to contain result
         // in order to prevent exceptional situation
@@ -353,7 +346,7 @@ class SQLSrvStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchAll($fetchMode = null, ...$args)
+    public function fetchAll(?int $fetchMode = null, ...$args) : array
     {
         $rows = [];
 
@@ -382,7 +375,7 @@ class SQLSrvStatement implements IteratorAggregate, Statement
     /**
      * {@inheritdoc}
      */
-    public function fetchColumn($columnIndex = 0)
+    public function fetchColumn(int $columnIndex = 0)
     {
         $row = $this->fetch(FetchMode::NUMERIC);
 

lib/Doctrine/DBAL/Driver/Statement.php

@@ -21,7 +21,7 @@ interface Statement extends ResultStatement
      * As mentioned above, the named parameters are not natively supported by the mysqli driver, use executeQuery(),
      * fetchAll(), fetchArray(), fetchColumn(), fetchAssoc() methods to have the named parameter emulated by doctrine.
      *
-     * @param mixed $param Parameter identifier. For a prepared statement using named placeholders,
+     * @param string|int $param Parameter identifier. For a prepared statement using named placeholders,
      *                          this will be a parameter name of the form :name. For a prepared statement
      *                          using question mark placeholders, this will be the 1-indexed position of the parameter.
      * @param mixed      $value The value to bind to the parameter.
@@ -30,7 +30,7 @@ interface Statement extends ResultStatement
      *
      * @throws DriverException
      */
-    public function bindValue($param, $value, $type = ParameterType::STRING) : void;
+    public function bindValue($param, $value, int $type = ParameterType::STRING) : void;
 
     /**
      * Binds a PHP variable to a corresponding named (not supported by mysqli driver, see comment below) or question
@@ -46,10 +46,10 @@ interface Statement extends ResultStatement
      * of stored procedures that return data as output parameters, and some also as input/output
      * parameters that both send in data and are updated to receive it.
      *
-     * @param mixed    $column   Parameter identifier. For a prepared statement using named placeholders,
+     * @param string|int $param    Parameter identifier. For a prepared statement using named placeholders,
      *                             this will be a parameter name of the form :name. For a prepared statement using
      *                             question mark placeholders, this will be the 1-indexed position of the parameter.
-     * @param mixed    $variable Name of the PHP variable to bind to the SQL statement parameter.
+     * @param mixed      $variable The variable to bind to the parameter.
      * @param int        $type     Explicit data type for the parameter using the {@link \Doctrine\DBAL\ParameterType}
      *                             constants.
      * @param int|null   $length   You must specify maxlength when using an OUT bind
@@ -57,7 +57,7 @@ interface Statement extends ResultStatement
      *
      * @throws DriverException
      */
-    public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null) : void;
+    public function bindParam($param, &$variable, int $type = ParameterType::STRING, ?int $length = null) : void;
 
     /**
      * Executes a prepared statement
@@ -73,5 +73,5 @@ interface Statement extends ResultStatement
      *
      * @throws DriverException
      */
-    public function execute($params = null) : void;
+    public function execute(?array $params = null) : void;
 }

lib/Doctrine/DBAL/Portability/Statement.php

@@ -47,17 +47,17 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * {@inheritdoc}
      */
-    public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null) : void
+    public function bindParam($param, &$variable, int $type = ParameterType::STRING, ?int $length = null) : void
     {
         assert($this->stmt instanceof DriverStatement);
 
-        $this->stmt->bindParam($column, $variable, $type, $length);
+        $this->stmt->bindParam($param, $variable, $type, $length);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function bindValue($param, $value, $type = ParameterType::STRING) : void
+    public function bindValue($param, $value, int $type = ParameterType::STRING) : void
     {
         assert($this->stmt instanceof DriverStatement);
 
@@ -75,7 +75,7 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * {@inheritdoc}
      */
-    public function columnCount()
+    public function columnCount() : int
     {
         return $this->stmt->columnCount();
     }
@@ -83,7 +83,7 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * {@inheritdoc}
      */
-    public function execute($params = null) : void
+    public function execute(?array $params = null) : void
     {
         assert($this->stmt instanceof DriverStatement);
 
@@ -93,7 +93,7 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * {@inheritdoc}
      */
-    public function setFetchMode($fetchMode, ...$args) : void
+    public function setFetchMode(int $fetchMode, ...$args) : void
     {
         $this->defaultFetchMode = $fetchMode;
 
@@ -111,13 +111,13 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * {@inheritdoc}
      */
-    public function fetch($fetchMode = null, ...$args)
+    public function fetch(?int $fetchMode = null, ...$args)
     {
         $fetchMode = $fetchMode ?: $this->defaultFetchMode;
 
         $row = $this->stmt->fetch($fetchMode, ...$args);
 
-        $iterateRow = $this->portability & (Connection::PORTABILITY_EMPTY_TO_NULL|Connection::PORTABILITY_RTRIM);
+        $iterateRow = ($this->portability & (Connection::PORTABILITY_EMPTY_TO_NULL|Connection::PORTABILITY_RTRIM)) !== 0;
         $fixCase    = $this->case !== null
             && ($fetchMode === FetchMode::ASSOCIATIVE || $fetchMode === FetchMode::MIXED)
             && ($this->portability & Connection::PORTABILITY_FIX_CASE);
@@ -130,13 +130,13 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * {@inheritdoc}
      */
-    public function fetchAll($fetchMode = null, ...$args)
+    public function fetchAll(?int $fetchMode = null, ...$args) : array
     {
         $fetchMode = $fetchMode ?: $this->defaultFetchMode;
 
         $rows = $this->stmt->fetchAll($fetchMode, ...$args);
 
-        $iterateRow = $this->portability & (Connection::PORTABILITY_EMPTY_TO_NULL|Connection::PORTABILITY_RTRIM);
+        $iterateRow = ($this->portability & (Connection::PORTABILITY_EMPTY_TO_NULL|Connection::PORTABILITY_RTRIM)) !== 0;
         $fixCase    = $this->case !== null
             && ($fetchMode === FetchMode::ASSOCIATIVE || $fetchMode === FetchMode::MIXED)
             && ($this->portability & Connection::PORTABILITY_FIX_CASE);
@@ -166,12 +166,10 @@ class Statement implements IteratorAggregate, DriverStatement
 
     /**
      * @param mixed $row
-     * @param int   $iterateRow
-     * @param bool  $fixCase
      *
      * @return mixed
      */
-    protected function fixRow($row, $iterateRow, $fixCase)
+    protected function fixRow($row, bool $iterateRow, bool $fixCase)
     {
         if (! $row) {
             return $row;
@@ -197,7 +195,7 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * {@inheritdoc}
      */
-    public function fetchColumn($columnIndex = 0)
+    public function fetchColumn(int $columnIndex = 0)
     {
         $value = $this->stmt->fetchColumn($columnIndex);
 

lib/Doctrine/DBAL/Statement.php

@@ -36,14 +36,14 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * The parameter types.
      *
-     * @var int[]|string[]
+     * @var int[]|string[]|Type[]
      */
     protected $types = [];
 
     /**
      * The underlying driver statement.
      *
-     * @var \Doctrine\DBAL\Driver\Statement
+     * @var DriverStatement
      */
     protected $stmt;
 
@@ -67,7 +67,7 @@ class Statement implements IteratorAggregate, DriverStatement
      * @param string     $sql  The SQL of the statement.
      * @param Connection $conn The connection on which the statement should be executed.
      */
-    public function __construct($sql, Connection $conn)
+    public function __construct(string $sql, Connection $conn)
     {
         $this->sql      = $sql;
         $this->stmt     = $conn->getWrappedConnection()->prepare($sql);
@@ -83,17 +83,21 @@ class Statement implements IteratorAggregate, DriverStatement
      * type and the value undergoes the conversion routines of the mapping type before
      * being bound.
      *
-     * @param string|int $name  The name or position of the parameter.
-     * @param mixed      $value The value of the parameter.
-     * @param mixed      $type  Either a PDO binding type or a DBAL mapping type name or instance.
+     * @param string|int      $param Parameter identifier. For a prepared statement using named placeholders,
+     *                               this will be a parameter name of the form :name. For a prepared statement
+     *                               using question mark placeholders, this will be the 1-indexed position
+     *                               of the parameter.
+     * @param mixed           $value The value to bind to the parameter.
+     * @param string|int|Type $type  Either one of the constants defined in {@link \Doctrine\DBAL\ParameterType}
+     *                               or a DBAL mapping type name or instance.
      *
      * @throws DBALException
      * @throws DriverException
      */
-    public function bindValue($name, $value, $type = ParameterType::STRING) : void
+    public function bindValue($param, $value, $type = ParameterType::STRING) : void
     {
-        $this->params[$name] = $value;
-        $this->types[$name]  = $type;
+        $this->params[$param] = $value;
+        $this->types[$param]  = $type;
 
         if (is_string($type)) {
             $type = Type::getType($type);
@@ -106,7 +110,7 @@ class Statement implements IteratorAggregate, DriverStatement
             $bindingType = $type;
         }
 
-        $this->stmt->bindValue($name, $value, $bindingType);
+        $this->stmt->bindValue($param, $value, $bindingType);
     }
 
     /**
@@ -114,20 +118,23 @@ class Statement implements IteratorAggregate, DriverStatement
      *
      * Binding a parameter by reference does not support DBAL mapping types.
      *
-     * @param string|int $name   The name or position of the parameter.
-     * @param mixed      $var    The reference to the variable to bind.
+     * @param string|int $param    Parameter identifier. For a prepared statement using named placeholders,
+     *                             this will be a parameter name of the form :name. For a prepared statement
+     *                             using question mark placeholders, this will be the 1-indexed position
+     *                             of the parameter.
+     * @param mixed      $variable The variable to bind to the parameter.
      * @param int        $type     The PDO binding type.
      * @param int|null   $length   Must be specified when using an OUT bind
      *                             so that PHP allocates enough memory to hold the returned value.
      *
      * @throws DriverException
      */
-    public function bindParam($name, &$var, $type = ParameterType::STRING, $length = null) : void
+    public function bindParam($param, &$variable, int $type = ParameterType::STRING, ?int $length = null) : void
     {
-        $this->params[$name] = $var;
-        $this->types[$name]  = $type;
+        $this->params[$param] = $variable;
+        $this->types[$param]  = $type;
 
-        $this->stmt->bindParam($name, $var, $type, $length);
+        $this->stmt->bindParam($param, $variable, $type, $length);
     }
 
     /**
@@ -135,7 +142,7 @@ class Statement implements IteratorAggregate, DriverStatement
      *
      * @throws DBALException
      */
-    public function execute($params = null) : void
+    public function execute(?array $params = null) : void
     {
         if (is_array($params)) {
             $this->params = $params;
@@ -171,10 +178,8 @@ class Statement implements IteratorAggregate, DriverStatement
 
     /**
      * Returns the number of columns in the result set.
-     *
-     * @return int
      */
-    public function columnCount()
+    public function columnCount() : int
     {
         return $this->stmt->columnCount();
     }
@@ -182,7 +187,7 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * {@inheritdoc}
      */
-    public function setFetchMode($fetchMode, ...$args) : void
+    public function setFetchMode(int $fetchMode, ...$args) : void
     {
         $this->stmt->setFetchMode($fetchMode, ...$args);
     }
@@ -200,7 +205,7 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * {@inheritdoc}
      */
-    public function fetch($fetchMode = null, ...$args)
+    public function fetch(?int $fetchMode = null, ...$args)
     {
         return $this->stmt->fetch($fetchMode, ...$args);
     }
@@ -208,7 +213,7 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * {@inheritdoc}
      */
-    public function fetchAll($fetchMode = null, ...$args)
+    public function fetchAll(?int $fetchMode = null, ...$args) : array
     {
         return $this->stmt->fetchAll($fetchMode, ...$args);
     }
@@ -216,7 +221,7 @@ class Statement implements IteratorAggregate, DriverStatement
     /**
      * {@inheritDoc}
      */
-    public function fetchColumn($columnIndex = 0)
+    public function fetchColumn(int $columnIndex = 0)
     {
         return $this->stmt->fetchColumn($columnIndex);
     }
@@ -233,10 +238,8 @@ class Statement implements IteratorAggregate, DriverStatement
 
     /**
      * Gets the wrapped driver statement.
-     *
-     * @return \Doctrine\DBAL\Driver\Statement
      */
-    public function getWrappedStatement()
+    public function getWrappedStatement() : DriverStatement
     {
         return $this->stmt;
     }

tests/Doctrine/Tests/DBAL/Driver/OCI8/OCI8StatementTest.php

@@ -52,8 +52,7 @@ class OCI8StatementTest extends DbalTestCase
                 ->with(
                     $this->equalTo($index + 1),
                     $this->equalTo($value)
-                )
-                ->willReturn(true);
+                );
         }
 
         // can't pass to constructor since we don't have a real database handle,

tests/Doctrine/Tests/DBAL/Functional/ResultCacheTest.php

@@ -184,7 +184,7 @@ class ResultCacheTest extends DbalFunctionalTestCase
         $query = $this->connection->getDatabasePlatform()
             ->getDummySelectSQL('1');
 
-        $qcp = new QueryCacheProfile(0, 0, new ArrayCache());
+        $qcp = new QueryCacheProfile(0, null, new ArrayCache());
 
         $stmt = $this->connection->executeCacheQuery($query, [], [], $qcp);
         $stmt->fetchAll(FetchMode::COLUMN);