public byte[] getAllTableInfoForDataNodeActivation() {
    return TsTableInternalRPCUtil.serializeTableInitializationInfo(
        clusterSchemaInfo.getAllUsingTables(), clusterSchemaInfo.getAllPreCreateTables());
  }
get all template set and pre-set info to sync to a registering dataNodes, the pre unset
template info won't be taken
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/manager/schema/ClusterSchemaManager.java