Add rowCount() to the Result interface

lib/Doctrine/DBAL/Cache/ArrayStatement.php

@@ -48,11 +48,19 @@ class ArrayStatement implements IteratorAggregate, ResultStatement, Result
      */
     public function closeCursor()
     {
-        unset($this->data);
+        $this->data = [];
 
         return true;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function rowCount()
+    {
+        return count($this->data);
+    }
+
     /**
      * {@inheritdoc}
      */

lib/Doctrine/DBAL/Driver/Result.php

@@ -63,6 +63,17 @@ interface Result
      */
     public function fetchFirstColumn(): array;
 
+    /**
+     * Returns the number of rows affected by the DELETE, INSERT, or UPDATE statement that produced the result.
+     *
+     * If the statement executed a SELECT query or a similar platform-specific SQL (e.g. DESCRIBE, SHOW, etc.),
+     * some database drivers may return the number of rows returned by that query. However, this behaviour
+     * is not guaranteed for all drivers and should not be relied on in portable applications.
+     *
+     * @return int The number of rows.
+     */
+    public function rowCount();
+
     /**
      * Returns the number of columns in the result
      *