diff --git a/src/kit/taosdemox/subscribe.json b/src/kit/taosdemox/subscribe.json
index 6dfacdd6ed112b398cf38731147cafc02879efe2..f70b1213a884af7d593b3d7366268ce03de1d239 100644
--- a/src/kit/taosdemox/subscribe.json
+++ b/src/kit/taosdemox/subscribe.json
@@ -5,13 +5,13 @@
   "port": 6030,
   "user": "root",
   "password": "taosdata",
-  "databases": "db01",
-  "super_table_query":
+  "databases": "db",
+  "specified_table_query":
     {"concurrent":1, "mode":"sync", "interval":5000, "restart":"yes", "keepProgress":"yes",
-      "sqls": [{"sql": "select avg(c1) from stb01 where col1 > 1;", "result": "./subscribe_res0.txt"}]
+     "sqls": [{"sql": "select avg(col1) from stb01 where col1 > 1;", "result": "./subscribe_res0.txt"}]
     },
-  "sub_table_query": 
-    {"stblname": "stb01", "threads":1, "mode":"sync", "interval":10000, "restart":"yes", "keepProgress":"yes",
-		 "sqls": [{"sql": "select col1 from xxxx where col1 > 10;", "result": "./subscribe_res1.txt"}]
-	  }
+  "super_table_query": 
+    {"stblname": "stb", "threads":1, "mode":"sync", "interval":10000, "restart":"yes", "keepProgress":"yes",
+     "sqls": [{"sql": "select col1 from xxxx where col1 > 10;", "result": "./subscribe_res1.txt"}]
+    }
 }
diff --git a/src/kit/taosdemox/taosdemox.c b/src/kit/taosdemox/taosdemox.c
index 0e2ec6d7ae82feabb6a9fa15b5425067776b3292..5c187030c521193e024062763c342cd0d928133c 100644
--- a/src/kit/taosdemox/taosdemox.c
+++ b/src/kit/taosdemox/taosdemox.c
@@ -4269,23 +4269,24 @@ void *subSubscribeProcess(void *sarg) {
   } while (0);
 
   // start loop to consume result
+  TAOS_RES* res = NULL;
   while (1) {
     for (int i = 0; i < g_queryInfo.subQueryInfo.sqlCount; i++) {
       if (1 == g_queryInfo.subQueryInfo.subscribeMode) {
         continue;
       }
       
-      TAOS_RES* res = taos_consume(g_queryInfo.subQueryInfo.tsub[i]);
+      res = taos_consume(g_queryInfo.subQueryInfo.tsub[i]);
       if (res) {
         char tmpFile[MAX_FILE_NAME_LEN*2] = {0};
         if (g_queryInfo.subQueryInfo.result[i][0] != 0) {
           sprintf(tmpFile, "%s-%d", g_queryInfo.subQueryInfo.result[i], winfo->threadID);
         }
         getResult(res, tmpFile);
-        taos_free_result(res);
       }
     }
   }
+  taos_free_result(res);
   
   for (int i = 0; i < g_queryInfo.subQueryInfo.sqlCount; i++) {
     taos_unsubscribe(g_queryInfo.subQueryInfo.tsub[i], g_queryInfo.subQueryInfo.subscribeKeepProgress);
@@ -4328,23 +4329,24 @@ void *superSubscribeProcess(void *sarg) {
   } while (0);
 
   // start loop to consume result
+  TAOS_RES* res = NULL;
   while (1) {
     for (int i = 0; i < g_queryInfo.superQueryInfo.sqlCount; i++) {
       if (1 == g_queryInfo.superQueryInfo.subscribeMode) {
         continue;
       }
       
-      TAOS_RES* res = taos_consume(g_queryInfo.superQueryInfo.tsub[i]);
+      res = taos_consume(g_queryInfo.superQueryInfo.tsub[i]);
       if (res) {
         char tmpFile[MAX_FILE_NAME_LEN*2] = {0};
         if (g_queryInfo.superQueryInfo.result[i][0] != 0) {
           sprintf(tmpFile, "%s-%d", g_queryInfo.superQueryInfo.result[i], winfo->threadID);
         }
         getResult(res, tmpFile);
-        taos_free_result(res);
       }
     }
   }
+  taos_free_result(res);
   
   for (int i = 0; i < g_queryInfo.superQueryInfo.sqlCount; i++) {
     taos_unsubscribe(g_queryInfo.superQueryInfo.tsub[i], g_queryInfo.superQueryInfo.subscribeKeepProgress);
diff --git a/src/mnode/inc/mnodeDef.h b/src/mnode/inc/mnodeDef.h
index a07607e615a46c34c1a570cacc42c8f36769b754..d29a738a10f6734ee62b45867582ed75c667f78f 100644
--- a/src/mnode/inc/mnodeDef.h
+++ b/src/mnode/inc/mnodeDef.h
@@ -259,7 +259,7 @@ typedef struct {
   int16_t  bytes[TSDB_MAX_COLUMNS];
   int32_t  numOfReads;
   int8_t   maxReplica;
-  int8_t   reserved0[0];
+  int8_t   reserved0[1];
   uint16_t payloadLen;
   char     payload[];
 } SShowObj;
diff --git a/src/mnode/inc/mnodeSdb.h b/src/mnode/inc/mnodeSdb.h
index e4df562d81c7ef91fe1ff62eba6611d76e0a3ff1..e4e4a7a054ff194a578dbaad75b2ae17bfe6f1ad 100644
--- a/src/mnode/inc/mnodeSdb.h
+++ b/src/mnode/inc/mnodeSdb.h
@@ -60,7 +60,7 @@ typedef struct SSdbRow {
   int32_t  (*fpReq)(SMnodeMsg *pMsg);
   int32_t  (*fpRsp)(SMnodeMsg *pMsg, int32_t code);
   char       reserveForSync[24];
-  SWalHead   pHead[];
+  SWalHead   pHead;
 } SSdbRow;
 
 typedef struct {
diff --git a/src/mnode/src/mnodeSdb.c b/src/mnode/src/mnodeSdb.c
index 9d2bfe0ce15f2579bdffd95095ca235bdadff286..ae495108b3a3d0afd479057d9828ae4c69d4537f 100644
--- a/src/mnode/src/mnodeSdb.c
+++ b/src/mnode/src/mnodeSdb.c
@@ -274,7 +274,7 @@ static int32_t sdbGetSyncVersion(int32_t vgId, uint64_t *fver, uint64_t *vver) {
 
 // failed to forward, need revert insert
 static void sdbHandleFailedConfirm(SSdbRow *pRow) {
-  SWalHead *pHead = pRow->pHead;
+  SWalHead *pHead = &pRow->pHead;
   int32_t   action = pHead->msgType % 10;
 
   sdbError("vgId:1, row:%p:%s hver:%" PRIu64 " action:%s, failed to foward since %s", pRow->pObj,
@@ -1012,7 +1012,7 @@ static void sdbFreeQueue() {
 }
 
 static int32_t sdbWriteToQueue(SSdbRow *pRow, int32_t qtype) {
-  SWalHead *pHead = pRow->pHead;
+  SWalHead *pHead = &pRow->pHead;
 
   if (pHead->len > TSDB_MAX_WAL_SIZE) {
     sdbError("vgId:1, wal len:%d exceeds limit, hver:%" PRIu64, pHead->len, pHead->version);
@@ -1051,8 +1051,8 @@ static int32_t sdbWriteFwdToQueue(int32_t vgId, void *wparam, int32_t qtype, voi
     return TSDB_CODE_VND_OUT_OF_MEMORY;
   }
 
-  memcpy(pRow->pHead, pHead, sizeof(SWalHead) + pHead->len);
-  pRow->rowData = pRow->pHead->cont;
+  memcpy(&pRow->pHead, pHead, sizeof(SWalHead) + pHead->len);
+  pRow->rowData = pRow->pHead.cont;
 
   int32_t code = sdbWriteToQueue(pRow, qtype);
   if (code == TSDB_CODE_MND_ACTION_IN_PROGRESS) code = 0;
@@ -1073,7 +1073,7 @@ static int32_t sdbWriteRowToQueue(SSdbRow *pInputRow, int32_t action) {
   memcpy(pRow, pInputRow, sizeof(SSdbRow));
   pRow->processedCount = 1;
 
-  SWalHead *pHead = pRow->pHead;
+  SWalHead *pHead = &pRow->pHead;
   pRow->rowData = pHead->cont;
   (*pTable->fpEncode)(pRow);
 
@@ -1103,9 +1103,9 @@ static void *sdbWorkerFp(void *pWorker) {
     for (int32_t i = 0; i < numOfMsgs; ++i) {
       taosGetQitem(tsSdbWQall, &qtype, (void **)&pRow);
       sdbTrace("vgId:1, msg:%p, row:%p hver:%" PRIu64 ", will be processed in sdb queue", pRow->pMsg, pRow->pObj,
-               pRow->pHead->version);
+               pRow->pHead.version);
 
-      pRow->code = sdbProcessWrite((qtype == TAOS_QTYPE_RPC) ? pRow : NULL, pRow->pHead, qtype, NULL);
+      pRow->code = sdbProcessWrite((qtype == TAOS_QTYPE_RPC) ? pRow : NULL, &pRow->pHead, qtype, NULL);
       if (pRow->code > 0) pRow->code = 0;
 
       sdbTrace("vgId:1, msg:%p is processed in sdb queue, code:%x", pRow->pMsg, pRow->code);
@@ -1122,7 +1122,7 @@ static void *sdbWorkerFp(void *pWorker) {
         sdbConfirmForward(1, pRow, pRow->code);
       } else {
         if (qtype == TAOS_QTYPE_FWD) {
-          syncConfirmForward(tsSdbMgmt.sync, pRow->pHead->version, pRow->code);
+          syncConfirmForward(tsSdbMgmt.sync, pRow->pHead.version, pRow->code);
         }
         sdbFreeFromQueue(pRow);
       }