diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index 8d2a24ef538a6c10457201ca4a6d64582a497d6a..2f198f449066b5559a35d852466e271e7a20eac3 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -323,7 +323,10 @@ static int32_t translateTrimStr(SFunctionNode* pFunc, char* pErrBuf, int32_t len
 
   int32_t numOfSpaces = 0;
   SNode* pParamNode1 = nodesListGetNode(pFunc->pParameterList, 0);
-  if (nodeType(pParamNode1) != QUERY_NODE_VALUE) {
+  // for select trim functions with constant value from table,
+  // need to set the proper result result schema bytes to avoid
+  // trailing garbage characters
+  if (nodeType(pParamNode1) == QUERY_NODE_VALUE) {
     SValueNode* pValue = (SValueNode*)pParamNode1;
     numOfSpaces = countTrailingSpaces(pValue, isLtrim);
   }