diff --git a/src/common/src/tvariant.c b/src/common/src/tvariant.c
index 086292b2e271a9f48ee6c2b9be918672d1b6c886..13d67c5552098e948e27afa5f5d1be3aa0d7e718 100644
--- a/src/common/src/tvariant.c
+++ b/src/common/src/tvariant.c
@@ -284,7 +284,7 @@ void tVariantAssign(tVariant *pDst, const tVariant *pSrc) {
 
   }
 
-  if (IS_NUMERIC_TYPE(pSrc->nType) || (pSrc->nType == TSDB_DATA_TYPE_BOOL)) {
+  if (IS_NUMERIC_TYPE(pSrc->nType) || IS_TIMESTAMP_TYPE(pSrc->nType) || (pSrc->nType == TSDB_DATA_TYPE_BOOL)) {
     pDst->i64 = pSrc->i64;
   } else if (pSrc->nType == TSDB_DATA_TYPE_POINTER_ARRAY) {  // this is only for string array
     size_t num = taosArrayGetSize(pSrc->arr);