diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index de69096902..fe6ecdcbb1 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -870,6 +870,7 @@ struct SDelOp {
   int64_t version;
   TSKEY   sKey;  // included
   TSKEY   eKey;  // included
+  SDelOp *pNext;
 };
 
 #endif
diff --git a/source/dnode/vnode/src/tsdb/tsdbMemTable2.c b/source/dnode/vnode/src/tsdb/tsdbMemTable2.c
index 4494dafc44..049364e9d7 100644
--- a/source/dnode/vnode/src/tsdb/tsdbMemTable2.c
+++ b/source/dnode/vnode/src/tsdb/tsdbMemTable2.c
@@ -26,7 +26,8 @@ struct SMemData {
   TSDBKEY  minKey;
   TSDBKEY  maxKey;
   int64_t  nRows;
-  SArray  *aDelOp;  // SArray<SDelOp>
+  SDelOp  *delOpHead;
+  SDelOp  *delOpTail;
 };
 
 struct SMemTable {
@@ -38,7 +39,8 @@ struct SMemTable {
   SArray *pArray;  // SArray<SMemData>
 };
 
-static int32_t tsdbGetOrCreateTbData(STsdb *pTsdb, tb_uid_t suid, tb_uid_t uid, SMemData **ppMemData);
+static int32_t tsdbGetOrCreateMemData(SMemTable *pMemTable, tb_uid_t suid, tb_uid_t uid, SMemData **ppMemData);
+static int     memDataPCmprFn(const void *p1, const void *p2);
 
 // SMemTable ==============================================
 int32_t tsdbMemTableCreate2(STsdb *pTsdb, SMemTable **ppMemTable) {
@@ -52,8 +54,8 @@ int32_t tsdbMemTableCreate2(STsdb *pTsdb, SMemTable **ppMemTable) {
   }
   pMemTable->pTsdb = pTsdb;
   pMemTable->nRef = 1;
-  pMemTable->minKey = (TSDBKEY){.version = -1, .ts = TSKEY_MAX};
-  pMemTable->maxKey = (TSDBKEY){.version = INT64_MAX, .ts = TSKEY_MIN};
+  pMemTable->minKey = (TSDBKEY){.version = INT64_MAX, .ts = TSKEY_MAX};
+  pMemTable->maxKey = (TSDBKEY){.version = -1, .ts = TSKEY_MIN};
   pMemTable->nRows = 0;
   pMemTable->pArray = taosArrayInit(512, sizeof(SMemData *));
   if (pMemTable->pArray == NULL) {
@@ -76,15 +78,17 @@ void tsdbMemTableDestroy2(SMemTable *pMemTable) {
 }
 
 int32_t tsdbInsertTableData2(STsdb *pTsdb, int64_t version, SVSubmitBlk *pSubmitBlk) {
-  int32_t   code = 0;
-  SMemData *pMemData;
+  int32_t    code = 0;
+  SMemTable *pMemTable = (SMemTable *)pTsdb->mem;  // TODO
+  SMemData  *pMemData;
+
+  ASSERT(pMemTable);
 
-  // check if table exists
   {
-    // TODO
+    // check if table exists (todo)
   }
 
-  code = tsdbGetOrCreateTbData(pTsdb, pSubmitBlk->suid, pSubmitBlk->uid, &pMemData);
+  code = tsdbGetOrCreateMemData(pMemTable, pSubmitBlk->suid, pSubmitBlk->uid, &pMemData);
   if (code) {
     tsdbError("vgId:%d failed to create/get table data since %s", TD_VID(pTsdb->pVnode), tstrerror(code));
     goto _err;
@@ -99,24 +103,90 @@ _err:
 }
 
 int32_t tsdbDeleteTableData2(STsdb *pTsdb, int64_t version, tb_uid_t suid, tb_uid_t uid, TSKEY sKey, TSKEY eKey) {
-  int32_t code = 0;
-  // TODO
+  int32_t    code = 0;
+  SMemTable *pMemTable = (SMemTable *)pTsdb->mem;  // TODO
+  SMemData  *pMemData;
+  SVBufPool *pPool = pTsdb->pVnode->inUse;
+
+  ASSERT(pMemTable);
+
+  {
+    // check if table exists (todo)
+  }
+
+  code = tsdbGetOrCreateMemData(pMemTable, suid, uid, &pMemData);
+  if (code) {
+    goto _err;
+  }
+
+  // do delete
+  SDelOp *pDelOp = (SDelOp *)vnodeBufPoolMalloc(pPool, sizeof(*pDelOp));
+  if (pDelOp == NULL) {
+    code = TSDB_CODE_OUT_OF_MEMORY;
+    goto _err;
+  }
+  pDelOp->version = version;
+  pDelOp->sKey = sKey;
+  pDelOp->eKey = eKey;
+  pDelOp->pNext = NULL;
+  if (pMemData->delOpHead == NULL) {
+    ASSERT(pMemData->delOpTail == NULL);
+    pMemData->delOpHead = pMemData->delOpTail = pDelOp;
+  } else {
+    pMemData->delOpTail->pNext = pDelOp;
+    pMemData->delOpTail = pDelOp;
+  }
+
+  {
+    // update the state of pMemTable, pMemData, last and lastrow (todo)
+  }
+
+  tsdbDebug("vgId:%d delete data from table suid:%" PRId64 " uid:%" PRId64 " sKey:%" PRId64 " eKey:%" PRId64
+            " since %s",
+            TD_VID(pTsdb->pVnode), suid, uid, sKey, eKey, tstrerror(code));
+  return code;
+
+_err:
+  tsdbError("vgId:%d failed to delete data from table suid:%" PRId64 " uid:%" PRId64 " sKey:%" PRId64 " eKey:%" PRId64
+            " since %s",
+            TD_VID(pTsdb->pVnode), suid, uid, sKey, eKey, tstrerror(code));
   return code;
 }
 
-static int32_t tsdbGetOrCreateTbData(STsdb *pTsdb, tb_uid_t suid, tb_uid_t uid, SMemData **ppMemData) {
+static int32_t tsdbGetOrCreateMemData(SMemTable *pMemTable, tb_uid_t suid, tb_uid_t uid, SMemData **ppMemData) {
   int32_t    code = 0;
+  int32_t    idx = 0;
+  SMemData  *pMemDataT = &(SMemData){.suid = suid, .uid = uid};
   SMemData  *pMemData = NULL;
-  SMemTable *pMemTable = (SMemTable *)pTsdb->mem;
+  SVBufPool *pPool = pMemTable->pTsdb->pVnode->inUse;
 
-  // search
-  pMemData = (SMemData *)taosbsearch(NULL, pMemTable->pArray->pData, taosArrayGetSize(pMemTable->pArray),
-                                     sizeof(SMemData *), NULL, TD_GE);
-
-  if (pMemData == NULL) {
-    // not found, create one
+  // get
+  idx = taosArraySearchIdx(pMemTable->pArray, &pMemDataT, memDataPCmprFn, TD_GE);
+  if (idx >= 0) {
+    pMemData = (SMemData *)taosArrayGet(pMemTable->pArray, idx);
+    if (memDataPCmprFn(&pMemDataT, &pMemData) == 0) goto _exit;
   }
 
+  // create
+  pMemData = vnodeBufPoolMalloc(pPool, sizeof(*pMemData));
+  if (pMemData == NULL) {
+    code = TSDB_CODE_OUT_OF_MEMORY;
+    goto _err;
+  }
+  pMemData->suid = suid;
+  pMemData->uid = uid;
+  pMemData->minKey = (TSDBKEY){.version = INT64_MAX, .ts = TSKEY_MAX};
+  pMemData->maxKey = (TSDBKEY){.version = -1, .ts = TSKEY_MIN};
+  pMemData->nRows = 0;
+  pMemData->delOpHead = pMemData->delOpTail = NULL;
+
+  if (idx < 0) idx = 0;
+  if (taosArrayInsert(pMemTable->pArray, idx, &pMemData) == NULL) {
+    code = TSDB_CODE_OUT_OF_MEMORY;
+    goto _err;
+  }
+
+_exit:
   *ppMemData = pMemData;
   return code;
 
@@ -125,6 +195,25 @@ _err:
   return code;
 }
 
+static int memDataPCmprFn(const void *p1, const void *p2) {
+  SMemData *pMemData1 = *(SMemData **)p1;
+  SMemData *pMemData2 = *(SMemData **)p2;
+
+  if (pMemData1->suid < pMemData2->suid) {
+    return -1;
+  } else if (pMemData1->suid > pMemData2->suid) {
+    return 1;
+  }
+
+  if (pMemData1->uid < pMemData2->uid) {
+    return -1;
+  } else if (pMemData1->uid > pMemData2->uid) {
+    return 1;
+  }
+
+  return 0;
+}
+
 #if 0  //====================================================================================
 
 #define SL_MAX_LEVEL 5