diff --git a/source/common/src/tdatablock.c b/source/common/src/tdatablock.c
index fda1a0529014bd8aaf996f2488422de1051b968a..64f56212af0d3818b9f91004029194d55600eb5a 100644
--- a/source/common/src/tdatablock.c
+++ b/source/common/src/tdatablock.c
@@ -2030,21 +2030,24 @@ int32_t buildSubmitReqFromDataBlock(SSubmitReq** pReq, const SSDataBlock* pDataB
               tdAppendColValToRow(&rb, PRIMARYKEY_TIMESTAMP_COL_ID, TSDB_DATA_TYPE_TIMESTAMP, TD_VTYPE_NORM, var, true,
                                   offset, k);
 
+            } else if (colDataIsNull_s(pColInfoData, j)) {
+              tdAppendColValToRow(&rb, PRIMARYKEY_TIMESTAMP_COL_ID + k, TSDB_DATA_TYPE_TIMESTAMP, TD_VTYPE_NULL, NULL,
+                                  false, offset, k);
             } else {
               tdAppendColValToRow(&rb, PRIMARYKEY_TIMESTAMP_COL_ID + k, TSDB_DATA_TYPE_TIMESTAMP, TD_VTYPE_NORM, var,
                                   true, offset, k);
             }
             break;
-          case TSDB_DATA_TYPE_NCHAR: {
-            void* data = colDataGetData(pColInfoData, j);
-            tdAppendColValToRow(&rb, PRIMARYKEY_TIMESTAMP_COL_ID + k, TSDB_DATA_TYPE_NCHAR, TD_VTYPE_NORM, data, true,
-                                offset, k);
-            break;
-          }
+          case TSDB_DATA_TYPE_NCHAR:
           case TSDB_DATA_TYPE_VARCHAR: {  // TSDB_DATA_TYPE_BINARY
-            void* data = colDataGetData(pColInfoData, j);
-            tdAppendColValToRow(&rb, PRIMARYKEY_TIMESTAMP_COL_ID + k, TSDB_DATA_TYPE_VARCHAR, TD_VTYPE_NORM, data, true,
-                                offset, k);
+            if (colDataIsNull_s(pColInfoData, j)) {
+              tdAppendColValToRow(&rb, PRIMARYKEY_TIMESTAMP_COL_ID + k, pColInfoData->info.type, TD_VTYPE_NULL, NULL,
+                                  false, offset, k);
+            } else {
+              void* data = colDataGetData(pColInfoData, j);
+              tdAppendColValToRow(&rb, PRIMARYKEY_TIMESTAMP_COL_ID + k, pColInfoData->info.type, TD_VTYPE_NORM, data,
+                                  true, offset, k);
+            }
             break;
           }
           case TSDB_DATA_TYPE_VARBINARY:
@@ -2057,7 +2060,10 @@ int32_t buildSubmitReqFromDataBlock(SSubmitReq** pReq, const SSDataBlock* pDataB
             break;
           default:
             if (pColInfoData->info.type < TSDB_DATA_TYPE_MAX && pColInfoData->info.type > TSDB_DATA_TYPE_NULL) {
-              if (pCol->type == pColInfoData->info.type) {
+              if (colDataIsNull_s(pColInfoData, j)) {
+                tdAppendColValToRow(&rb, PRIMARYKEY_TIMESTAMP_COL_ID + k, pCol->type, TD_VTYPE_NULL, NULL, false, offset,
+                                    k);
+              } else if (pCol->type == pColInfoData->info.type) {
                 tdAppendColValToRow(&rb, PRIMARYKEY_TIMESTAMP_COL_ID + k, pCol->type, TD_VTYPE_NORM, var, true, offset,
                                     k);
               } else {