Index: src/wp-includes/class-wp-query.php
=====================================================
--- a/src/wp-includes/class-wp-query.php
+++ b/src/wp-includes/class-wp-query.php
@@ -1760,6 +1760,8 @@ class WP_Query {
 	 * database query.
 	 *
 	 * @since 1.5.0
+    * 
+    * @global wpdb $wpdb WordPress database abstraction object.
 	 *
 	 * @return WP_Post[]|int[] Array of post objects or post IDs.
 	 */