From dbeafb508b1895144942de6fbd4414d3d759f91a Mon Sep 17 00:00:00 2001
From: Benguang Zhao <bgzhao@taosdata.com>
Date: Tue, 29 Aug 2023 17:56:24 +0800
Subject: [PATCH] fix: reset show obj iter on no more data to read in
 mndRetrieveIdx

---
 source/dnode/mnode/impl/src/mndSma.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/source/dnode/mnode/impl/src/mndSma.c b/source/dnode/mnode/impl/src/mndSma.c
index d666f80fd3..44842084c5 100644
--- a/source/dnode/mnode/impl/src/mndSma.c
+++ b/source/dnode/mnode/impl/src/mndSma.c
@@ -1324,7 +1324,14 @@ static int32_t mndRetrieveIdx(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pBloc
     pShow->pIter = taosMemoryCalloc(1, sizeof(SSmaAndTagIter));
   }
   int32_t read = mndRetrieveSma(pReq, pShow, pBlock, rows);
-  if (read < rows) read += mndRetrieveTagIdx(pReq, pShow, pBlock, rows - read);
+  if (read < rows) {
+    read += mndRetrieveTagIdx(pReq, pShow, pBlock, rows - read);
+  }
+  // no more to read
+  if (read < rows) {
+    taosMemoryFree(pShow->pIter);
+    pShow->pIter = NULL;
+  }
   return read;
 }
 static void mndCancelRetrieveIdx(SMnode *pMnode, void *pIter) {