diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index ec699408de943f228e2c0aa7057f265bc9fc446a..4811a3b35d3fc15be5af78cff8d420868637da9b 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -5427,6 +5427,7 @@ int32_t validateColumnName(char* name) {
 
   if (token.type == TK_STRING) {
     strdequote(token.z);
+    strntolower(token.z, token.z, token.n);
     token.n = (uint32_t)strtrim(token.z);
 
     int32_t k = tSQLGetToken(token.z, &token.type);
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index d045000e24485f27d9cbde89ff76e794d12b2c32..bad4a870d5ddfd2c96faa283ce44894022f7676b 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -1420,9 +1420,11 @@ int32_t tscValidateName(SStrToken* pToken) {
   char* sep = strnchr(pToken->z, TS_PATH_DELIMITER[0], pToken->n, true);
   if (sep == NULL) {  // single part
     if (pToken->type == TK_STRING) {
+       
       strdequote(pToken->z);
+      strntolower(pToken->z, pToken->z, pToken->n);
       pToken->n = (uint32_t)strtrim(pToken->z);
-
+       
       int len = tSQLGetToken(pToken->z, &pToken->type);
 
       // single token, validate it