fix:memory leak

source/client/src/clientImpl.c

@@ -1757,6 +1757,7 @@ static int32_t doConvertJson(SReqResultInfo* pResultInfo, int32_t numOfCols, int
     return TSDB_CODE_TSC_INTERNAL_ERROR;
   }
 
+  taosMemoryFreeClear(pResultInfo->convertJson);
   pResultInfo->convertJson = taosMemoryCalloc(1, dataLen);
   if (pResultInfo->convertJson == NULL) return TSDB_CODE_OUT_OF_MEMORY;
   char* p1 = pResultInfo->convertJson;

source/libs/parser/src/parTranslater.c

@@ -8008,6 +8008,9 @@ static int32_t buildKVRowForAllTags(STranslateContext* pCxt, SCreateSubTableClau
       if (pTagSchema->type == TSDB_DATA_TYPE_JSON) {
         isJson = true;
         code = buildJsonTagVal(pCxt, pTagSchema, pVal, pTagArray, ppTag);
+        if (TSDB_CODE_SUCCESS != code) {
+          nodesDestroyNode((SNode*)pVal);
+        }
         taosArrayPush(tagName, pTagSchema->name);
       } else if (pVal->node.resType.type != TSDB_DATA_TYPE_NULL && !pVal->isNull) {
         char*   tmpVal = nodesGetValueFromNode(pVal);
@@ -8328,13 +8331,7 @@ static int32_t buildUpdateTagValReq(STranslateContext* pCxt, SAlterTableStmt* pS
     SArray* pTagVals = taosArrayInit(1, sizeof(STagVal));
     int32_t code = TSDB_CODE_SUCCESS;
     STag*   pTag = NULL;
-    do {
     code = parseJsontoTagData(pStmt->pVal->literal, pTagVals, &pTag, &pCxt->msgBuf);
-      if (TSDB_CODE_SUCCESS != code) {
-        break;
-      }
-    } while (0);
-
     taosArrayDestroy(pTagVals);
     if (code != TSDB_CODE_SUCCESS) {
       return code;

source/libs/parser/src/parUtil.c

@@ -416,7 +416,7 @@ int32_t parseJsontoTagData(const char* json, SArray* pTagVals, STag** ppTag, voi
 end:
   taosHashCleanup(keyHash);
   if (retCode == TSDB_CODE_SUCCESS) {
-    tTagNew(pTagVals, 1, true, ppTag);
+    retCode = tTagNew(pTagVals, 1, true, ppTag);
   }
   for (int i = 0; i < taosArrayGetSize(pTagVals); ++i) {
     STagVal* p = (STagVal*)taosArrayGet(pTagVals, i);