diff --git a/source/client/src/clientHb.c b/source/client/src/clientHb.c
index 9475d1b51e51d093bcf7335d1668908e0c039a80..56e3527f9684e17f58c7b0fca5bb7a3fa6210d1c 100644
--- a/source/client/src/clientHb.c
+++ b/source/client/src/clientHb.c
@@ -145,7 +145,7 @@ static int32_t hbProcessStbInfoRsp(void *value, int32_t valueLen, struct SCatalo
 }
 
 static int32_t hbQueryHbRspHandle(SAppHbMgr *pAppHbMgr, SClientHbRsp *pRsp) {
-  SClientHbReq *pReq = taosHashGet(pAppHbMgr->activeInfo, &pRsp->connKey, sizeof(SClientHbKey));
+  SClientHbReq *pReq = taosHashAcquire(pAppHbMgr->activeInfo, &pRsp->connKey, sizeof(SClientHbKey));
   if (NULL == pReq) {
     tscWarn("pReq to get activeInfo, may be dropped, refId:%" PRIx64 ", type:%d", pRsp->connKey.tscRid,
             pRsp->connKey.connType);
@@ -260,6 +260,8 @@ static int32_t hbQueryHbRspHandle(SAppHbMgr *pAppHbMgr, SClientHbRsp *pRsp) {
     }
   }
 
+  taosHashRelease(pAppHbMgr->activeInfo, pReq);
+
   return TSDB_CODE_SUCCESS;
 }
 
@@ -914,10 +916,11 @@ int hbRegisterConn(SAppHbMgr *pAppHbMgr, int64_t tscRefId, int64_t clusterId, in
 }
 
 void hbDeregisterConn(SAppHbMgr *pAppHbMgr, SClientHbKey connKey) {
-  SClientHbReq *pReq = taosHashGet(pAppHbMgr->activeInfo, &connKey, sizeof(SClientHbKey));
+  SClientHbReq *pReq = taosHashAcquire(pAppHbMgr->activeInfo, &connKey, sizeof(SClientHbKey));
   if (pReq) {
     tFreeClientHbReq(pReq);
     taosHashRemove(pAppHbMgr->activeInfo, &connKey, sizeof(SClientHbKey));
+    taosHashRelease(pAppHbMgr->activeInfo, pReq);
   }
 
   if (NULL == pReq) {
diff --git a/source/libs/parser/src/parser.c b/source/libs/parser/src/parser.c
index 7e27132f3cbc453a5cf09bd487acc75fa546ff7e..7ee6a5b2236b24a676214c3538ed182aa52f427a 100644
--- a/source/libs/parser/src/parser.c
+++ b/source/libs/parser/src/parser.c
@@ -136,8 +136,7 @@ static int32_t setValueByBindParam(SValueNode* pVal, TAOS_MULTI_BIND* pParam) {
 }
 
 static EDealRes rewriteQueryExprAliasImpl(SNode* pNode, void* pContext) {
-  if (nodesIsExprNode(pNode) && QUERY_NODE_COLUMN != nodeType(pNode) && '\0' == ((SExprNode*)pNode)->userAlias[0]) {
-    strcpy(((SExprNode*)pNode)->userAlias, ((SExprNode*)pNode)->aliasName);
+  if (nodesIsExprNode(pNode) && QUERY_NODE_COLUMN != nodeType(pNode)) {
     sprintf(((SExprNode*)pNode)->aliasName, "#%d", *(int32_t*)pContext);
     ++(*(int32_t*)pContext);
   }
diff --git a/tests/script/api/batchprepare.c b/tests/script/api/batchprepare.c
index ada2039460b431363555025ec7984f6b2f1b354a..f39d5e6528275900350ffaefbee18d43ce9a9e81 100644
--- a/tests/script/api/batchprepare.c
+++ b/tests/script/api/batchprepare.c
@@ -2598,7 +2598,6 @@ void runAll(TAOS *taos) {
   printf("%s Begin\n", gCaseCtrl.caseCatalog);
   runCaseList(taos);
 
-#if 0
   strcpy(gCaseCtrl.caseCatalog, "Micro DB precision Test");
   printf("%s Begin\n", gCaseCtrl.caseCatalog);
   gCaseCtrl.precision = TIME_PRECISION_MICRO;
@@ -2654,7 +2653,6 @@ void runAll(TAOS *taos) {
   gCaseCtrl.bindColNum = 6;
   runCaseList(taos);
   gCaseCtrl.bindColNum = 0;
-#endif
 
 /*
   strcpy(gCaseCtrl.caseCatalog, "Bind Col Type Test");