Ticket #35761: 35761.patch

wp-includes/link-template.php

@@ -1854 +1854 @@
          */
         $sort = apply_filters( "get_{$adjacent}_post_sort", "ORDER BY p.post_date $order LIMIT 1", $post, $order );
 
-        $query     = "SELECT p.ID FROM $wpdb->posts AS p $join $where $sort";
+        $query = "SELECT p.ID FROM $wpdb->posts AS p $join $where $sort";
+
+        /**
+         * Filters the final SQL for an adjacent post query.
+         *
+         * The dynamic portion of the hook name, `$adjacent`, refers to the type
+         * of adjacency, 'next' or 'previous'.
+         *
+         * @since 5.6.0
+         *
+         * @param string  $query The final SQL.
+         * @param WP_Post $post  WP_Post object.
+         */
+        $query = apply_filters( "get_{$adjacent}_post_query", $query, $post );
+
         $query_key = 'adjacent_post_' . md5( $query );
         $result    = wp_cache_get( $query_key, 'counts' );
         if ( false !== $result ) {