diff --git a/push-down-test/functions.txt b/push-down-test/functions.txt
index 7b8e1cb..76bc1de 100644
--- a/push-down-test/functions.txt
+++ b/push-down-test/functions.txt
@@ -71,3 +71,4 @@ ltrim
 rtrim
 reverse
 left
+upper
\ No newline at end of file