schemaless: fix errors about modify_column

src/client/src/tscParseLineProtocol.c

@@ -891,12 +891,12 @@ static int32_t insertChildTableBatch(TAOS* taos,  char* cTableName, SArray* cols
 
     if (code == TSDB_CODE_APP_NOT_READY ||
         code == TSDB_CODE_TDB_INVALID_TABLE_ID || code == TSDB_CODE_VND_INVALID_VGROUP_ID) {
-//      TAOS_RES* res2 = taos_query(taos, "RESET QUERY CACHE");
-//      int32_t   code2 = taos_errno(res2);
-//      if (code2 != TSDB_CODE_SUCCESS) {
-//        tscError("SML:0x%" PRIx64 " insert child table. reset query cache. error: %s", info->id, taos_errstr(res2));
-//      }
-//      taos_free_result(res2);
+      TAOS_RES* res2 = taos_query(taos, "RESET QUERY CACHE");
+      int32_t   code2 = taos_errno(res2);
+      if (code2 != TSDB_CODE_SUCCESS) {
+        tscError("SML:0x%" PRIx64 " insert child table. reset query cache. error: %s", info->id, taos_errstr(res2));
+      }
+      taos_free_result(res2);
       if (tryAgain) {
         taosMsleep(50 * (2 << try));
       }

src/mnode/src/mnodeTable.c

@@ -1518,7 +1518,6 @@ static int32_t mnodeChangeSuperTableColumn(SMnodeMsg *pMsg) {
   // update
   SSchema *schema = (SSchema *) (pStable->schema + col);
   ASSERT(schema->type == TSDB_DATA_TYPE_BINARY || schema->type == TSDB_DATA_TYPE_NCHAR);
-  schema->bytes = pAlter->schema[0].bytes;
 
   if (pAlter->schema[0].bytes <= schema->bytes) {
     mError("msg:%p, app:%p stable:%s, modify column len. column:%s, len from %d to %d", pMsg, pMsg->rpcMsg.ahandle,
@@ -1526,6 +1525,7 @@ static int32_t mnodeChangeSuperTableColumn(SMnodeMsg *pMsg) {
     return TSDB_CODE_MND_INVALID_COLUMN_LENGTH;
   }
 
+  schema->bytes = pAlter->schema[0].bytes;
   pStable->sversion++;
   mInfo("msg:%p, app:%p stable %s, start to modify column %s len to %d", pMsg, pMsg->rpcMsg.ahandle, pStable->info.tableId,
          name, schema->bytes);