diff --git a/source/dnode/vnode/CMakeLists.txt b/source/dnode/vnode/CMakeLists.txt
index b80adb9a95..dd51e2c911 100644
--- a/source/dnode/vnode/CMakeLists.txt
+++ b/source/dnode/vnode/CMakeLists.txt
@@ -41,7 +41,7 @@ target_sources(
     "src/tsdb/tsdbFS.c"
     "src/tsdb/tsdbOpen.c"
     "src/tsdb/tsdbMemTable.c"
-    "src/tsdb/tsdbMemTable2.c"
+    # "src/tsdb/tsdbMemTable2.c"
     "src/tsdb/tsdbRead.c"
     "src/tsdb/tsdbReadImpl.c"
     "src/tsdb/tsdbWrite.c"
diff --git a/source/dnode/vnode/src/tsdb/tsdbDelete.c b/source/dnode/vnode/src/tsdb/tsdbDelete.c
new file mode 100644
index 0000000000..6dea4a4e57
--- /dev/null
+++ b/source/dnode/vnode/src/tsdb/tsdbDelete.c
@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
\ No newline at end of file
diff --git a/source/dnode/vnode/src/tsdb/tsdbMemTable.c b/source/dnode/vnode/src/tsdb/tsdbMemTable.c
index 99a4d78c6f..7b3882aa75 100644
--- a/source/dnode/vnode/src/tsdb/tsdbMemTable.c
+++ b/source/dnode/vnode/src/tsdb/tsdbMemTable.c
@@ -142,69 +142,6 @@ int tsdbLoadDataFromCache(STsdb *pTsdb, STable *pTable, SSkipListIterator *pIter
       } else {
         fKey = tdGetKey(filterKeys[filterIter]);
       }
-#if 0
-    } else if (fKey > rowKey) {
-      if (isRowDel) {
-        pMergeInfo->rowsDeleteFailed++;
-      } else {
-        if (pMergeInfo->rowsInserted - pMergeInfo->rowsDeleteSucceed >= maxRowsToRead) break;
-        if (pCols && pMergeInfo->nOperations >= pCols->maxPoints) break;
-
-        pMergeInfo->rowsInserted++;
-        pMergeInfo->nOperations++;
-        pMergeInfo->keyFirst = TMIN(pMergeInfo->keyFirst, rowKey);
-        pMergeInfo->keyLast = TMAX(pMergeInfo->keyLast, rowKey);
-        tsdbAppendTableRowToCols(pTable, pCols, &pSchema, row);
-      }
-
-      tSkipListIterNext(pIter);
-      row = tsdbNextIterRow(pIter);
-      if (row == NULL || TD_ROW_KEY(row) > maxKey) {
-        rowKey = INT64_MAX;
-        isRowDel = false;
-      } else {
-        rowKey = TD_ROW_KEY(row);
-        isRowDel = TD_ROW_IS_DELETED(row);
-      }
-    } else {
-      if (isRowDel) {
-        ASSERT(!keepDup);
-        if (pCols && pMergeInfo->nOperations >= pCols->maxPoints) break;
-        pMergeInfo->rowsDeleteSucceed++;
-        pMergeInfo->nOperations++;
-        tsdbAppendTableRowToCols(pTable, pCols, &pSchema, row);
-      } else {
-        if (keepDup) {
-          if (pCols && pMergeInfo->nOperations >= pCols->maxPoints) break;
-          pMergeInfo->rowsUpdated++;
-          pMergeInfo->nOperations++;
-          pMergeInfo->keyFirst = TMIN(pMergeInfo->keyFirst, rowKey);
-          pMergeInfo->keyLast = TMAX(pMergeInfo->keyLast, rowKey);
-          tsdbAppendTableRowToCols(pTable, pCols, &pSchema, row);
-        } else {
-          pMergeInfo->keyFirst = TMIN(pMergeInfo->keyFirst, fKey);
-          pMergeInfo->keyLast = TMAX(pMergeInfo->keyLast, fKey);
-        }
-      }
-
-      tSkipListIterNext(pIter);
-      row = tsdbNextIterRow(pIter);
-      if (row == NULL || TD_ROW_KEY(row) > maxKey) {
-        rowKey = INT64_MAX;
-        isRowDel = false;
-      } else {
-        rowKey = TD_ROW_KEY(row);
-        isRowDel = TD_ROW_IS_DELETED(row);
-      }
-
-      filterIter++;
-      if (filterIter >= nFilterKeys) {
-        fKey = INT64_MAX;
-      } else {
-        fKey = tdGetKey(filterKeys[filterIter]);
-      }
-    }
-#endif
 #if 1
     } else if (fKey > rowKey) {
       if (isRowDel) {
diff --git a/source/dnode/vnode/src/tsdb/tsdbMemTable2.c b/source/dnode/vnode/src/tsdb/tsdbMemTable2.c
index cb9bf00ed7..690e1baf73 100644
--- a/source/dnode/vnode/src/tsdb/tsdbMemTable2.c
+++ b/source/dnode/vnode/src/tsdb/tsdbMemTable2.c
@@ -15,7 +15,6 @@
 
 #include "tsdb.h"
 
-#if 0
 typedef struct SMemTable          SMemTable;
 typedef struct SMemData           SMemData;
 typedef struct SMemSkipList       SMemSkipList;
@@ -100,7 +99,7 @@ static int32_t tsdbMemSkipListCursorMoveToNext(SMemSkipListCurosr *pSlc);
 static int32_t tsdbMemSkipListCursorMoveToPrev(SMemSkipListCurosr *pSlc);
 static SMemSkipListNode *tsdbMemSkipListNodeCreate(SVBufPool *pPool, SMemSkipList *pSl, const STsdbRow *pTRow);
 
-// SMemTable
+// SMemTable ========================
 int32_t tsdbMemTableCreate2(STsdb *pTsdb, SMemTable **ppMemTb) {
   SMemTable *pMemTb = NULL;
 
@@ -378,5 +377,4 @@ static SMemSkipListNode *tsdbMemSkipListNodeCreate(SVBufPool *pPool, SMemSkipLis
   }
 
   return pNode;
-}
-#endif
\ No newline at end of file
+}
\ No newline at end of file