diff --git a/src/client/src/tscParseLineProtocol.c b/src/client/src/tscParseLineProtocol.c
index 3a1840bdf2e221e69ef804c281b0a2efa0140d20..69e7fddbccdad8f749d046649af03c761c1bdebd 100644
--- a/src/client/src/tscParseLineProtocol.c
+++ b/src/client/src/tscParseLineProtocol.c
@@ -82,32 +82,26 @@ typedef struct {
   };
 } SSchemaAction;
 
-static int32_t smlFindNearestPowerOf2(int32_t length, uint8_t type) {
-  int32_t result = 1;
-  while (result <= length) {
-    result *= 2;
-  }
-  if (type == TSDB_DATA_TYPE_BINARY && result > TSDB_MAX_BINARY_LEN - VARSTR_HEADER_SIZE){
-    result = TSDB_MAX_BINARY_LEN - VARSTR_HEADER_SIZE;
-  } else if (type == TSDB_DATA_TYPE_NCHAR && result > (TSDB_MAX_BINARY_LEN - VARSTR_HEADER_SIZE) / TSDB_NCHAR_SIZE){
-    result = (TSDB_MAX_BINARY_LEN - VARSTR_HEADER_SIZE) / TSDB_NCHAR_SIZE;
-  }
-
-  if (type == TSDB_DATA_TYPE_NCHAR){
-    result = result * TSDB_NCHAR_SIZE + VARSTR_HEADER_SIZE;
-  }else if (type == TSDB_DATA_TYPE_BINARY){
-    result = result + VARSTR_HEADER_SIZE;
-  }
-  return result;
-}
-
 static int32_t getFieldBytesFromSmlKv(TAOS_SML_KV* kv, int32_t* bytes, uint64_t id) {
   if (!IS_VAR_DATA_TYPE(kv->type)) {
     *bytes = tDataTypes[kv->type].bytes;
   } else {
-    *bytes = smlFindNearestPowerOf2(kv->length, kv->type);
+    if (kv->type == TSDB_DATA_TYPE_NCHAR) {
+//      char* ucs = malloc(kv->length * TSDB_NCHAR_SIZE + 1);
+//      int32_t bytesNeeded = 0;
+//      bool succ = taosMbsToUcs4(kv->value, kv->length, ucs, kv->length * TSDB_NCHAR_SIZE, &bytesNeeded);
+//      if (!succ) {
+//        free(ucs);
+//        tscError("SML:0x%"PRIx64" convert nchar string to UCS4_LE failed:%s", id, kv->value);
+//        return TSDB_CODE_TSC_INVALID_VALUE;
+//      }
+//      free(ucs);
+//      *bytes =  bytesNeeded + VARSTR_HEADER_SIZE;
+      *bytes = (kv->length == 0 ? 1 : kv->length) * TSDB_NCHAR_SIZE + VARSTR_HEADER_SIZE;
+    } else if (kv->type == TSDB_DATA_TYPE_BINARY) {
+      *bytes = (kv->length == 0 ? 1 : kv->length) + VARSTR_HEADER_SIZE;
+    }
   }
-
   return 0;
 }