diff -u b/core/lib/Drupal/Core/Database/StatementPrefetch.php b/core/lib/Drupal/Core/Database/StatementPrefetch.php
--- b/core/lib/Drupal/Core/Database/StatementPrefetch.php
+++ b/core/lib/Drupal/Core/Database/StatementPrefetch.php
@@ -133,7 +133,7 @@
   public $allowRowCount = FALSE;
 
   /**
-   * Constructor for StatementPrefetch object.
+   * Creates a new StatementPrefetch instance.
    *
    * @param \PDO $pdo_connection
    *   PDO database handler.
@@ -159,6 +159,7 @@
    *   in the SQL statement being executed.
    * @param array $options
    *   An array of options for this query.
+   *
    * @return bool
    *   TRUE on success, or FALSE on failure.
    */
@@ -242,6 +243,7 @@
    *   The query.
    * @param array $args
    *   An array of arguments.
+   *
    * @return \PDOStatement
    *   A PDOStatement object.
    */
@@ -398,6 +400,7 @@
    *
    * @param  $fetch_style (optional)
    *   One of the \PDO::FETCH_* constants.
+   *
    * @return mixed
    *   Returns current row and sets record pointer to next record
    *   or FALSE if there is no result set.
@@ -428,6 +431,7 @@
    *
    * @param  int $index
    *    The index of the column number to fetch.
+   *
    * @return mixed
    *    An indexed array, or FALSE if there is no result set.
    */