only in patch2:
unchanged:
--- a/core/modules/views/src/EntityViewsData.php
+++ b/core/modules/views/src/EntityViewsData.php
@@ -371,6 +371,7 @@ protected function mapSingleFieldViewsData($table, $field_name, $field_type, $co
           case 'char':
           case 'string':
           case 'varchar':
+          case 'varchar_ascii':
           case 'tinytext':
           case 'text':
           case 'mediumtext':