Merge pull request #6629 from taosdata/hotfix/TD-4910

[TD-4910]fix double free issue

src/client/src/tscSQLParser.c

@@ -7784,6 +7784,7 @@ int32_t validateSqlNode(SSqlObj* pSql, SSqlNode* pSqlNode, SQueryInfo* pQueryInf
   const char* msg5 = "only tag query not compatible with normal column filter";
   const char* msg6 = "not support stddev/percentile/interp in the outer query yet";
   const char* msg7 = "derivative/twa/irate requires timestamp column exists in subquery";
+  const char* msg8 = "condition missing for join query";
 
   int32_t code = TSDB_CODE_SUCCESS;
 
@@ -7871,6 +7872,10 @@ int32_t validateSqlNode(SSqlObj* pSql, SSqlNode* pSqlNode, SQueryInfo* pQueryInf
       if (validateWhereNode(pQueryInfo, &pSqlNode->pWhere, pSql) != TSDB_CODE_SUCCESS) {
         return TSDB_CODE_TSC_INVALID_OPERATION;
       }
+    } else {
+      if (pQueryInfo->numOfTables > 1) {
+        return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg8);
+      }
     }
 
     // validate the interval info

src/client/src/tscUtil.c

@@ -1307,7 +1307,7 @@ void tscResetSqlCmd(SSqlCmd* pCmd, bool clearCachedMeta) {
   if (pCmd->pTableMetaMap != NULL) {
     STableMetaVgroupInfo* p = taosHashIterate(pCmd->pTableMetaMap, NULL);
     while (p) {
-      tfree(p->pVgroupInfo);
+      tscVgroupInfoClear(p->pVgroupInfo);
       tfree(p->pTableMeta);
       p = taosHashIterate(pCmd->pTableMetaMap, p);
     }
@@ -4082,7 +4082,10 @@ SVgroupsInfo* tscVgroupsInfoDup(SVgroupsInfo* pVgroupsInfo) {
 
   size_t size = sizeof(SVgroupInfo) * pVgroupsInfo->numOfVgroups + sizeof(SVgroupsInfo);
   SVgroupsInfo* pInfo = calloc(1, size);
-  memcpy(pInfo, pVgroupsInfo, size);
+  pInfo->numOfVgroups = pVgroupsInfo->numOfVgroups;
+  for (int32_t m = 0; m < pVgroupsInfo->numOfVgroups; ++m) {
+    tscSVgroupInfoCopy(&pInfo->vgroups[m], &pVgroupsInfo->vgroups[m]);
+  }
   return pInfo;
 }