fix(tmq): check stb existence when subscribing stb

source/dnode/mnode/impl/src/mndTopic.c

@@ -401,6 +401,10 @@ static int32_t mndCreateTopic(SMnode *pMnode, SRpcMsg *pReq, SCMCreateTopicReq *
     }
   } else if (pCreate->subType == TOPIC_SUB_TYPE__TABLE) {
     SStbObj *pStb = mndAcquireStb(pMnode, pCreate->subStbName);
+    if (pStb == NULL) {
+      terrno = TSDB_CODE_MND_STB_NOT_EXIST;
+      return -1;
+    }
     topicObj.stbUid = pStb->uid;
   }
   /*} else if (pCreate->subType == TOPIC_SUB_TYPE__DB) {*/

source/libs/stream/src/streamExec.c

@@ -109,7 +109,7 @@ static SArray* streamExecForQall(SStreamTask* pTask, SArray* pRes) {
     if (type == STREAM_INPUT__TRIGGER) {
       blockDataDestroy(((SStreamTrigger*)data)->pBlock);
       taosFreeQitem(data);
-    } else if (type == STREAM_INPUT__DATA_BLOCK) {
+    } else if (type == STREAM_INPUT__DATA_BLOCK || type == STREAM_INPUT__DATA_RETRIEVE) {
       taosArrayDestroyEx(((SStreamDataBlock*)data)->blocks, (FDelete)tDeleteSSDataBlock);
       taosFreeQitem(data);
     } else if (type == STREAM_INPUT__DATA_SUBMIT) {