diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index 08d4cbad1ac82cc324ae9e10a836ff344522fa03..c704472dffc5ee5c0be877d288b0a52ffdbfc01a 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -809,7 +809,7 @@ 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 *pLastArray, SCacheRowsReader *pr, char const *lstring);
+int32_t tsdbCacheGet(STsdb *pTsdb, tb_uid_t uid, SArray *pLastArray, SCacheRowsReader *pr, int32_t ltype);
 int32_t tsdbCacheDel(STsdb *pTsdb, tb_uid_t suid, tb_uid_t uid, TSKEY sKey, TSKEY eKey);
 
 int32_t tsdbCacheInsertLast(SLRUCache *pCache, tb_uid_t uid, TSDBROW *row, STsdb *pTsdb);
diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index 35e4dce3dcf93af1ed0b5cae355e263fa18259a8..bccbc0c34e8c9448df2a6c9033c71b80a2df8264 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -293,8 +293,10 @@ _exit:
   return code;
 }
 
-int32_t tsdbCacheGet(STsdb *pTsdb, tb_uid_t uid, SArray *pLastArray, SCacheRowsReader *pr, char const *lstring) {
-  int32_t code = 0;
+int32_t tsdbCacheGet(STsdb *pTsdb, tb_uid_t uid, SArray *pLastArray, SCacheRowsReader *pr, int32_t ltype) {
+  static char const *alstring[2] = {"last", "last_row"};
+  char const        *lstring = alstring[ltype];
+  int32_t            code = 0;
 
   SArray *pCidList = pr->pCidList;
   int     num_keys = TARRAY_SIZE(pCidList);
diff --git a/source/dnode/vnode/src/tsdb/tsdbCacheRead.c b/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
index eac27fb3c6d42cd151d64147db54f37c76f99e8a..84873931d65203eaa21491116a2fd833a09243b0 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
@@ -285,7 +285,7 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
   pr->pDataFReader = NULL;
   pr->pDataFReaderLast = NULL;
 
-  char const* lstring = pr->type & CACHESCAN_RETRIEVE_LAST ? "last" : "last_row";
+  int32_t ltype = pr->type & CACHESCAN_RETRIEVE_LAST >> 3;
 
   // retrieve the only one last row of all tables in the uid list.
   if (HASTYPE(pr->type, CACHESCAN_RETRIEVE_TYPE_SINGLE)) {
@@ -294,7 +294,7 @@ 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, ltype);
       if (TARRAY_SIZE(pRow) <= 0) {
         taosArrayClearEx(pRow, freeItem);
         continue;
@@ -368,7 +368,7 @@ 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, ltype);
       if (TARRAY_SIZE(pRow) <= 0) {
         taosArrayClearEx(pRow, freeItem);
         continue;