diff --git a/src/inc/tglobalcfg.h b/src/inc/tglobalcfg.h
index c4407f7d55487689c84e5484fbb72749a62834e2..d4c998af31ee9243430d7ae2ba175851c4e3e79d 100644
--- a/src/inc/tglobalcfg.h
+++ b/src/inc/tglobalcfg.h
@@ -80,6 +80,7 @@ extern short tsNumOfTotalVnodes;
 extern short tsCheckHeaderFile;
 extern uint32_t tsServerIp;
 extern uint32_t tsPublicIpInt;
+extern short tsAffectedRowsMod;
 
 extern int tsSessionsPerVnode;
 extern int tsAverageCacheBlocks;
diff --git a/src/system/detail/src/vnodeImport.c b/src/system/detail/src/vnodeImport.c
index f7f01a3c69946238130746106f387d536eb0bd6a..1e6e5e6dc9b36bb9d3c759668e3ce1c7ce7173ac 100644
--- a/src/system/detail/src/vnodeImport.c
+++ b/src/system/detail/src/vnodeImport.c
@@ -911,6 +911,7 @@ static int vnodeMergeDataIntoFile(SImportInfo *pImport, const char *payload, int
             blockIter.nextKey = maxFileKey + 1;
           } else {  // Case 3. need to search the block for slot and pos
             if (key == minKey || key == maxKey) {
+              if (tsAffectedRowsMod) pointsImported++;
               payloadIter++;
               continue;
             }
@@ -939,6 +940,7 @@ static int vnodeMergeDataIntoFile(SImportInfo *pImport, const char *payload, int
             } while (left < right);
 
             if (key == blockMinKey || key == blockMaxKey) {  // duplicate key
+              if (tsAffectedRowsMod) pointsImported++;
               payloadIter++;
               continue;
             }
@@ -955,6 +957,7 @@ static int vnodeMergeDataIntoFile(SImportInfo *pImport, const char *payload, int
 
             if (key == importHandle.pBlocks[blockIter.slot].keyFirst ||
                 key == importHandle.pBlocks[blockIter.slot].keyLast) {
+              if (tsAffectedRowsMod) pointsImported++;
               payloadIter++;
               continue;
             }
@@ -976,6 +979,7 @@ static int vnodeMergeDataIntoFile(SImportInfo *pImport, const char *payload, int
                   importHandle.data[PRIMARYKEY_TIMESTAMP_COL_INDEX]->data, pBlock->numOfPoints, key, TSQL_SO_ASC);
               assert(pos != 0);
               if (KEY_AT_INDEX(importHandle.data[PRIMARYKEY_TIMESTAMP_COL_INDEX]->data, sizeof(TSKEY), pos) == key) {
+                if (tsAffectedRowsMod) pointsImported++;
                 payloadIter++;
                 continue;
               }
@@ -1106,6 +1110,7 @@ static int vnodeMergeDataIntoFile(SImportInfo *pImport, const char *payload, int
               if (KEY_AT_INDEX(payload, pObj->bytesPerPoint, payloadIter) ==
                   KEY_AT_INDEX(importHandle.data[PRIMARYKEY_TIMESTAMP_COL_INDEX]->data, sizeof(TSKEY),
                                blockIter.pos)) {  // duplicate key
+                if (tsAffectedRowsMod) pointsImported++;
                 payloadIter++;
                 continue;
               } else if (KEY_AT_INDEX(payload, pObj->bytesPerPoint, payloadIter) <
@@ -1320,7 +1325,10 @@ int vnodeImportDataToCache(SImportInfo *pImport, const char *payload, const int
   pImport->lastKey = lastKey;
   for (payloadIter = 0; payloadIter < rows; payloadIter++) {
     TSKEY key = KEY_AT_INDEX(payload, pObj->bytesPerPoint, payloadIter);
-    if (key == pObj->lastKey) continue;
+    if (key == pObj->lastKey) {
+      if (tsAffectedRowsMod) rowsImported++;
+      continue;
+    }
     if (key > pObj->lastKey) {  // Just as insert
       pImport->slot = pInfo->currentSlot;
       pImport->pos = pInfo->cacheBlocks[pImport->slot]->numOfPoints;
@@ -1333,11 +1341,12 @@ int vnodeImportDataToCache(SImportInfo *pImport, const char *payload, const int
       }
 
       if (pImport->firstKey != pImport->key) break;
+      if (tsAffectedRowsMod) rowsImported++;
     }
   }
 
   if (payloadIter == rows) {
-    pImport->importedRows = 0;
+    pImport->importedRows += rowsImported;
     code = 0;
     goto _exit;
   }
@@ -1470,6 +1479,7 @@ int vnodeImportDataToCache(SImportInfo *pImport, const char *payload, const int
         payloadIter++;
 
       } else {
+        if (tsAffectedRowsMod) rowsImported++;
         payloadIter++;
         continue;
       }
diff --git a/src/util/src/tglobalcfg.c b/src/util/src/tglobalcfg.c
index 7e18e2e74b1922a6744349d8d9443c2858344a7f..d9d5b221a571081c3b464b663c7f6167424e550d 100644
--- a/src/util/src/tglobalcfg.c
+++ b/src/util/src/tglobalcfg.c
@@ -87,6 +87,12 @@ short tsCheckHeaderFile = 0;
 int tsSessionsPerVnode = 1000;
 int tsCacheBlockSize = 16384;  // 256 columns
 int tsAverageCacheBlocks = TSDB_DEFAULT_AVG_BLOCKS;
+/**
+ * Change the meaning of affected rows:
+ * 0: affected rows not include those duplicate records
+ * 1: affected rows include those duplicate records
+ */
+short tsAffectedRowsMod = 0;
 
 int   tsRowsInFileBlock = 4096;
 float tsFileBlockMinPercent = 0.05;
@@ -539,6 +545,9 @@ static void doInitGlobalConfig() {
   tsInitConfigOption(cfg++, "alternativeRole", &tsAlternativeRole, TSDB_CFG_VTYPE_INT,
                      TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_CLUSTER,
                      0, 2, 0, TSDB_CFG_UTYPE_NONE);
+  tsInitConfigOption(cfg++, "affectedRowsMod", &tsAffectedRowsMod, TSDB_CFG_VTYPE_SHORT,
+                     TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_LOG | TSDB_CFG_CTYPE_B_CLIENT,
+                     0, 1, 0, TSDB_CFG_UTYPE_NONE);
   // 0-any, 1-mgmt, 2-dnode
 
   // timer