diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index d71eb33951ab4bac814959b0fc9605560f3548c9..7309ea3407c088ce2d7b2ec8263ab50bcb9d9359 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -228,23 +228,23 @@ int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, STsdb *pTsdb, tb_uid_t uid, ST
             invalidate = true;
 
             break;
-          }
-        } else {
-          SLastCol lastCol = {.ts = keyTs, .colVal = colVal};
-          if (IS_VAR_DATA_TYPE(colVal.type) && colVal.value.nData > 0) {
-            SLastCol *pLastCol = (SLastCol *)taosArrayGet(pLast, iCol);
-            taosMemoryFree(pLastCol->colVal.value.pData);
-
-            lastCol.colVal.value.pData = taosMemoryMalloc(colVal.value.nData);
-            if (lastCol.colVal.value.pData == NULL) {
-              terrno = TSDB_CODE_OUT_OF_MEMORY;
-              code = TSDB_CODE_OUT_OF_MEMORY;
-              goto _invalidate;
+          } else {  // new inserting key is greater than cached, update cached entry
+            SLastCol lastCol = {.ts = keyTs, .colVal = colVal};
+            if (IS_VAR_DATA_TYPE(colVal.type) && colVal.value.nData > 0) {
+              SLastCol *pLastCol = (SLastCol *)taosArrayGet(pLast, iCol);
+              taosMemoryFree(pLastCol->colVal.value.pData);
+
+              lastCol.colVal.value.pData = taosMemoryMalloc(colVal.value.nData);
+              if (lastCol.colVal.value.pData == NULL) {
+                terrno = TSDB_CODE_OUT_OF_MEMORY;
+                code = TSDB_CODE_OUT_OF_MEMORY;
+                goto _invalidate;
+              }
+              memcpy(lastCol.colVal.value.pData, colVal.value.pData, colVal.value.nData);
             }
-            memcpy(lastCol.colVal.value.pData, colVal.value.pData, colVal.value.nData);
-          }
 
-          taosArraySet(pLast, iCol, &lastCol);
+            taosArraySet(pLast, iCol, &lastCol);
+          }
         }
       }
     }
@@ -253,65 +253,10 @@ int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, STsdb *pTsdb, tb_uid_t uid, ST
     taosMemoryFreeClear(pTSchema);
 
     taosLRUCacheRelease(pCache, h, invalidate);
-    /*
-    cacheRow = (STSRow *)taosLRUCacheValue(pCache, h);
-    if (row->ts >= cacheRow->ts) {
-      if (row->ts == cacheRow->ts) {
-        STSRow    *mergedRow = NULL;
-        SRowMerger merger = {0};
-        STSchema  *pTSchema = metaGetTbTSchema(pTsdb->pVnode->pMeta, uid, -1, 1);
-
-        tRowMergerInit(&merger, &tsdbRowFromTSRow(0, cacheRow), pTSchema);
-
-        tRowMerge(&merger, &tsdbRowFromTSRow(1, row));
-
-        tRowMergerGetRow(&merger, &mergedRow);
-        tRowMergerClear(&merger);
-
-        taosMemoryFreeClear(pTSchema);
-
-        row = mergedRow;
-        dup = false;
-      }
-
-      if (TD_ROW_LEN(row) <= TD_ROW_LEN(cacheRow)) {
-        tdRowCpy(cacheRow, row);
-        if (!dup) {
-          taosMemoryFree(row);
-        }
-
-        taosLRUCacheRelease(pCache, h, false);
-      } else {
-        taosLRUCacheRelease(pCache, h, true);
-        // tsdbCacheDeleteLastrow(pCache, uid, TSKEY_MAX);
-        if (dup) {
-          cacheRow = tdRowDup(row);
-        } else {
-          cacheRow = row;
-        }
-        _taos_lru_deleter_t deleter = deleteTableCacheLastrow;
-        LRUStatus status = taosLRUCacheInsert(pCache, key, keyLen, cacheRow, TD_ROW_LEN(cacheRow), deleter, NULL,
-                                              TAOS_LRU_PRIORITY_LOW);
-        if (status != TAOS_LRU_STATUS_OK) {
-          code = -1;
-        }
-        // tsdbCacheInsertLastrow(pCache, uid, row, dup);
-      }
-    }*/
-  } /*else {
-    if (dup) {
-      cacheRow = tdRowDup(row);
-    } else {
-      cacheRow = row;
-    }
-
-    _taos_lru_deleter_t deleter = deleteTableCacheLastrow;
-    LRUStatus           status =
-        taosLRUCacheInsert(pCache, key, keyLen, cacheRow, TD_ROW_LEN(cacheRow), deleter, NULL, TAOS_LRU_PRIORITY_LOW);
-    if (status != TAOS_LRU_STATUS_OK) {
-      code = -1;
+    if (invalidate) {
+      taosLRUCacheErase(pCache, key, keyLen);
     }
-    }*/
+  }
 
   return code;
 }
@@ -349,28 +294,28 @@ int32_t tsdbCacheInsertLast(SLRUCache *pCache, tb_uid_t uid, STSRow *row, STsdb
 
         SColVal colVal = {0};
         tTSRowGetVal(row, pTSchema, iCol, &colVal);
-        if (!COL_VAL_IS_VALUE(&colVal)) {
+        if (COL_VAL_IS_VALUE(&colVal)) {
           if (keyTs == tTsVal1->ts && COL_VAL_IS_VALUE(tColVal)) {
             invalidate = true;
 
             break;
-          }
-        } else {
-          SLastCol lastCol = {.ts = keyTs, .colVal = colVal};
-          if (IS_VAR_DATA_TYPE(colVal.type) && colVal.value.nData > 0) {
-            SLastCol *pLastCol = (SLastCol *)taosArrayGet(pLast, iCol);
-            taosMemoryFree(pLastCol->colVal.value.pData);
-
-            lastCol.colVal.value.pData = taosMemoryMalloc(colVal.value.nData);
-            if (lastCol.colVal.value.pData == NULL) {
-              terrno = TSDB_CODE_OUT_OF_MEMORY;
-              code = TSDB_CODE_OUT_OF_MEMORY;
-              goto _invalidate;
+          } else {
+            SLastCol lastCol = {.ts = keyTs, .colVal = colVal};
+            if (IS_VAR_DATA_TYPE(colVal.type) && colVal.value.nData > 0) {
+              SLastCol *pLastCol = (SLastCol *)taosArrayGet(pLast, iCol);
+              taosMemoryFree(pLastCol->colVal.value.pData);
+
+              lastCol.colVal.value.pData = taosMemoryMalloc(colVal.value.nData);
+              if (lastCol.colVal.value.pData == NULL) {
+                terrno = TSDB_CODE_OUT_OF_MEMORY;
+                code = TSDB_CODE_OUT_OF_MEMORY;
+                goto _invalidate;
+              }
+              memcpy(lastCol.colVal.value.pData, colVal.value.pData, colVal.value.nData);
             }
-            memcpy(lastCol.colVal.value.pData, colVal.value.pData, colVal.value.nData);
-          }
 
-          taosArraySet(pLast, iCol, &lastCol);
+            taosArraySet(pLast, iCol, &lastCol);
+          }
         }
       }
     }
@@ -379,9 +324,9 @@ int32_t tsdbCacheInsertLast(SLRUCache *pCache, tb_uid_t uid, STSRow *row, STsdb
     taosMemoryFreeClear(pTSchema);
 
     taosLRUCacheRelease(pCache, h, invalidate);
-
-    // clear last cache anyway, lazy load when get last lookup
-    // taosLRUCacheRelease(pCache, h, true);
+    if (invalidate) {
+      taosLRUCacheErase(pCache, key, keyLen);
+    }
   }
 
   return code;