[td-225] fix bugs in restore from core dump

src/mnode/src/mnodeDb.c

@@ -84,8 +84,11 @@ static int32_t mnodeDbActionDelete(SSdbOper *pOper) {
   mnodeDropAllChildTables(pDb);
   mnodeDropAllSuperTables(pDb);
   mnodeDropAllDbVgroups(pDb);
+
+  if (pAcct) {
     mnodeDropDbFromAcct(pAcct, pDb);
     mnodeDecAcctRef(pAcct);
+  }
 
   return TSDB_CODE_SUCCESS;
 }

src/mnode/src/mnodeTable.c

@@ -157,10 +157,12 @@ static int32_t mnodeChildTableActionDelete(SSdbOper *pOper) {
   if (pDb != NULL) pAcct = mnodeGetAcct(pDb->acct);
 
   if (pTable->info.type == TSDB_CHILD_TABLE) {
+    if (pTable->superTable) {
       grantRestore(TSDB_GRANT_TIMESERIES, pTable->superTable->numOfColumns - 1);
       if (pAcct != NULL) pAcct->acctInfo.numOfTimeSeries -= (pTable->superTable->numOfColumns - 1);
       mnodeRemoveTableFromStable(pTable->superTable, pTable);
       mnodeDecTableRef(pTable->superTable);
+    }
   } else {
     grantRestore(TSDB_GRANT_TIMESERIES, pTable->numOfColumns - 1);
     if (pAcct != NULL) pAcct->acctInfo.numOfTimeSeries -= (pTable->numOfColumns - 1);