diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index df7b940f61cd830a1425a81dea00d14b0fca1cfc..fb1c9514ce29b7ba5402e39103540e2ed6d0fc55 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -439,6 +439,15 @@ int32_t tsdbCacheGet(STsdb *pTsdb, tb_uid_t uid, SArray *pLastArray, SCacheRowsR
           tsdbError("vgId:%d, %s failed at line %d since %s", TD_VID(pTsdb->pVnode), __func__, __LINE__, err);
           rocksdb_free(err);
         }
+      } else {
+        SColVal *pColVal = &pLastCol->colVal;
+        if (IS_VAR_DATA_TYPE(pColVal->type)) {
+          uint8_t *pVal = pColVal->value.pData;
+          pColVal->value.pData = taosMemoryMalloc(pColVal->value.nData);
+          if (pColVal->value.nData) {
+            memcpy(pColVal->value.pData, pVal, pColVal->value.nData);
+          }
+        }
       }
 
       taosThreadMutexUnlock(&pTsdb->rCache.rMutex);
@@ -1381,7 +1390,11 @@ static int32_t getNextRowFromFS(void *iter, TSDBROW **ppRow, bool *pIgnoreEarlie
         *pIgnoreEarlierTs = false;
         tBlockDataReset(state->pBlockData);
         TABLEID tid = {.suid = state->suid, .uid = state->uid};
-        code = tBlockDataInit(state->pBlockData, &tid, state->pTSchema, aCols, nCols);
+        int     nTmpCols = nCols;
+        /*if (aCols[0] == PRIMARYKEY_TIMESTAMP_COL_ID && nCols == 1) {
+          nTmpCols = 0;
+          }*/
+        code = tBlockDataInit(state->pBlockData, &tid, state->pTSchema, aCols, nTmpCols);
         if (code) goto _err;
 
         code = tsdbReadDataBlock(*state->pDataFReader, &block, state->pBlockData);