diff --git a/src/client/src/tscParseInsert.c b/src/client/src/tscParseInsert.c
index 2ce3748dd1d9ae102c7d6a43ba25ceb84ac5f76e..4bee595dacffec859909fd1fe8a946906a554e36 100644
--- a/src/client/src/tscParseInsert.c
+++ b/src/client/src/tscParseInsert.c
@@ -310,7 +310,7 @@ int32_t tsParseOneColumnData(SSchema *pSchema, SSQLToken *pToken, char *payload,
         
         *payload = TSDB_DATA_BINARY_NULL;
       } else { // too long values will return invalid sql, not be truncated automatically
-        if (pToken->n + VARSTR_HEADER_SIZE > pSchema->bytes) {
+        if (pToken->n + VARSTR_HEADER_SIZE > pSchema->bytes) { //todo refactor
           return tscInvalidSQLErrMsg(msg, "string data overflow", pToken->z);
         }