From 57c574e38aa4c380b53824a2be096653ca54adf5 Mon Sep 17 00:00:00 2001
From: Ganlin Zhao <ganlinzhao@hotmail.com>
Date: Fri, 8 Apr 2022 10:40:55 +0800
Subject: [PATCH] [TD-14575]<fix>: fix rtrim result not correct for nchar
 columns

---
 source/libs/scalar/src/sclfunc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/libs/scalar/src/sclfunc.c b/source/libs/scalar/src/sclfunc.c
index 1a6abb7100..df9e1bf36d 100644
--- a/source/libs/scalar/src/sclfunc.c
+++ b/source/libs/scalar/src/sclfunc.c
@@ -267,7 +267,7 @@ static void trtrim(char *input, char *output, int32_t type, int32_t charLen) {
       numOfSpaces++;
     }
   } else { //NCHAR
-    for (int32_t i = charLen - 1; i < charLen; ++i) {
+    for (int32_t i = charLen - 1; i >= 0; --i) {
       if (!iswspace(*((uint32_t *)varDataVal(input) + i))) {
         break;
       }