fix: fix coverity errors

source/libs/function/src/functionMgt.c

@@ -324,7 +324,7 @@ static SFunctionNode* createFunction(const char* pName, SNodeList* pParameterLis
   if (NULL == pFunc) {
     return NULL;
   }
-  strcpy(pFunc->functionName, pName);
+  snprintf(pFunc->functionName, sizeof(pFunc->functionName), "%s", pName);
   pFunc->pParameterList = pParameterList;
   if (TSDB_CODE_SUCCESS != getFuncInfo(pFunc)) {
     pFunc->pParameterList = NULL;
@@ -402,10 +402,6 @@ static int32_t createMergeFunction(const SFunctionNode* pSrcFunc, const SFunctio
   if (TSDB_CODE_SUCCESS == code) {
     *pMergeFunc = pFunc;
   } else {
-    if (NULL != pFunc) {
-      pFunc->pParameterList = NULL;
-      nodesDestroyNode((SNode*)pFunc);
-    }
     nodesDestroyList(pParameterList);
   }
 

source/libs/function/src/tpercentile.c

@@ -96,7 +96,9 @@ double findOnlyResult(tMemBucket *pMemBucket) {
     }
 
     int32_t groupId = getGroupId(pMemBucket->numOfSlots, i, pMemBucket->times);
-    SArray *list = *(SArray **)taosHashGet(pMemBucket->groupPagesMap, &groupId, sizeof(groupId));
+    SArray **pList = taosHashGet(pMemBucket->groupPagesMap, &groupId, sizeof(groupId));
+    if (pList != NULL)  {
+      SArray *list = *pList;
       assert(list->size == 1);
 
       int32_t   *pageId = taosArrayGet(list, 0);
@@ -107,6 +109,7 @@ double findOnlyResult(tMemBucket *pMemBucket) {
       GET_TYPED_DATA(v, double, pMemBucket->type, pPage->data);
       return v;
     }
+  }
 
   return 0;
 }