1cbbc60822
For each release of Doris, there are some experimental features. These feature may not stable or qualified enough, and user need to use it by setting config or session variables, eg, set enable_mtmv = true, otherwise, these feature is disable by default. We should explicitly tell user which features are experimental, so that user will notice that and decide whether to use it. Changes In this PR, I support the experimental_ prefix for FE config and session variables. Session Variable Given enable_nereids_planner as an example. The Nereids planner is an experimental feature in Doris, so there is an EXPERIMENTAL annotation for it: @VariableMgr.VarAttr(..., expType = ExperimentalType.EXPERIMENTAL) private boolean enableNereidsPlanner = false; And for compatibility, user can set it by: set enable_nereids_planner = true; set experimental_enable_nereids_planner = true; And for show variables, it will only show experimental_enable_nereids_planner entry. And you can also see all experimental session variables by: show variables like "%experimental%" Config Same as session variable, give enable_mtmv as an example. @ConfField(..., expType = ExperimentalType.EXPERIMENTAL) public static boolean enable_mtmv = false; User can set it in fe.conf or ADMIN SET FRONTEND CONFIG stmt with both names: enable_mtmv experimental_enable_mtmv And user can see all experimental FE configs by: ADMIN SHOW FRONTEND CONFIG LIKE "%experimental%"; TODO Support this feature for BE config Only add experimental for: enable_pipeline_engine enable_nereids_planner enable_single_replica_insert and FE config: enable_mtmv enabel_ssl enable_fqdn_mode Should modify other config and session vars
# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. # fe-common This module is used to store some common classes of other modules. # spark-dpp This module is Spark DPP program, used for Spark Load function. Depends: fe-common # fe-core This module is the main process module of FE. Depends: fe-common, spark-dpp