diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index 9856bc8dbe8b052861a4dcbbdcbb021b2eaa35bc..35c9af7c84340273813f586b6c66538242d972b4 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -808,7 +808,7 @@ typedef struct {
 int32_t tsdbOpenCache(STsdb *pTsdb);
 void    tsdbCloseCache(STsdb *pTsdb);
 int32_t tsdbCacheUpdate(STsdb *pTsdb, tb_uid_t suid, tb_uid_t uid, TSDBROW *row);
-int32_t tsdbCacheGet(STsdb *pTsdb, tb_uid_t uid, SArray **ppLastArray, SCacheRowsReader *pr, char const *lstring);
+int32_t tsdbCacheGet(STsdb *pTsdb, tb_uid_t uid, SArray *pLastArray, SCacheRowsReader *pr, char const *lstring);
 int32_t tsdbCacheInsertLast(SLRUCache *pCache, tb_uid_t uid, TSDBROW *row, STsdb *pTsdb);
 int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, STsdb *pTsdb, tb_uid_t uid, TSDBROW *row, bool dup);
 int32_t tsdbCacheGetLastH(SLRUCache *pCache, tb_uid_t uid, SCacheRowsReader *pr, LRUHandle **h);
diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index 26155e4554fd348df6107aa62d419c9ae0d8911e..e961008834bc3fbbd2da77135bd0b08bade2761c 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -294,7 +294,7 @@ _exit:
   return code;
 }
 
-int32_t tsdbCacheGet(STsdb *pTsdb, tb_uid_t uid, SArray **ppLastArray, SCacheRowsReader *pr, char const *lstring) {
+int32_t tsdbCacheGet(STsdb *pTsdb, tb_uid_t uid, SArray *pLastArray, SCacheRowsReader *pr, char const *lstring) {
   int32_t code = 0;
 
   SArray *pCidList = pr->pCidList;
@@ -326,7 +326,6 @@ int32_t tsdbCacheGet(STsdb *pTsdb, tb_uid_t uid, SArray **ppLastArray, SCacheRow
   taosMemoryFree(keys_list_sizes);
   taosMemoryFree(errs);
 
-  SArray *pLastArray = taosArrayInit(num_keys, sizeof(SLastCol));
   for (int i = 0; i < num_keys; ++i) {
     SLastCol *pLastCol = tsdbCacheDeserialize(values_list[i]);
 
@@ -337,7 +336,6 @@ int32_t tsdbCacheGet(STsdb *pTsdb, tb_uid_t uid, SArray **ppLastArray, SCacheRow
   taosMemoryFree(values_list);
   taosMemoryFree(values_list_sizes);
 
-  *ppLastArray = pLastArray;
   return code;
 }
 
diff --git a/source/dnode/vnode/src/tsdb/tsdbCacheRead.c b/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
index 52828c9ad0e9e0bb430cc1158927bf215d81dbc3..14e5ce0829145d5418852610bebf85889ba54c45 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
@@ -258,13 +258,10 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
   }
 
   SCacheRowsReader* pr = pReader;
-
-  int32_t    code = TSDB_CODE_SUCCESS;
-  SLRUCache* lruCache = pr->pVnode->pTsdb->lruCache;
-  LRUHandle* h = NULL;
-  SArray*    pRow = NULL;
-  bool       hasRes = false;
-  SArray*    pLastCols = NULL;
+  int32_t           code = TSDB_CODE_SUCCESS;
+  SArray*           pRow = taosArrayInit(TARRAY_SIZE(pr->pCidList), sizeof(SLastCol));
+  bool              hasRes = false;
+  SArray*           pLastCols = NULL;
 
   void** pRes = taosMemoryCalloc(pr->numOfCols, POINTER_BYTES);
   if (pRes == NULL) {
@@ -312,7 +309,7 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
     for (int32_t i = 0; i < pr->numOfTables; ++i) {
       STableKeyInfo* pKeyInfo = &pr->pTableList[i];
 
-      tsdbCacheGet(pr->pTsdb, pKeyInfo->uid, &pRow, pr, lstring);
+      tsdbCacheGet(pr->pTsdb, pKeyInfo->uid, pRow, pr, lstring);
       if (TARRAY_SIZE(pRow) <= 0) {
         taosArrayDestroy(pRow);
         continue;
@@ -371,7 +368,7 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
         taosArraySet(pTableUidList, 0, &pKeyInfo->uid);
       }
 
-      taosArrayDestroy(pRow);
+      taosArrayClear(pRow);
     }
 
     if (hasRes) {
@@ -381,14 +378,14 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
     for (int32_t i = pr->tableIndex; i < pr->numOfTables; ++i) {
       STableKeyInfo* pKeyInfo = &pr->pTableList[i];
 
-      tsdbCacheGet(pr->pTsdb, pKeyInfo->uid, &pRow, pr, lstring);
+      tsdbCacheGet(pr->pTsdb, pKeyInfo->uid, pRow, pr, lstring);
       if (TARRAY_SIZE(pRow) <= 0) {
         taosArrayDestroy(pRow);
         continue;
       }
 
       saveOneRow(pRow, pResBlock, pr, slotIds, dstSlotIds, pRes, pr->idstr);
-      taosArrayDestroy(pRow);
+      taosArrayClear(pRow);
 
       taosArrayPush(pTableUidList, &pKeyInfo->uid);
 
@@ -416,6 +413,7 @@ _end:
   }
 
   taosMemoryFree(pRes);
+  taosArrayDestroy(pRow);
   taosArrayDestroyEx(pLastCols, freeItem);
   return code;
 }