Hi Caizhi, Thanks a lot for you clarification! Now I understand the design of TableConfig.
Best, Paul Lam > 2021年9月24日 15:40，Caizhi Weng <tsreape...@gmail.com> 写道： > > Hi! > > TableConfig is for configurations related to the Table and SQL API, > especially the configurations in OptimizerConfigOptions and > ExecutionConfigOptions. > > By Flink Configuration I guess you mean the configuration in Configuration. > Sadly, as you say, it can be configured only once when creating the execution > environment, and only a few configuration can be modified with the > StreamExecutionEnvironment#configure method. This configuration contains > datastream and execution related configurations. > > I bet the devs separate the configurations because they belong to different > modules, but yes sometimes users will set their configuration in the wrong > place. > > Paul Lam <paullin3...@gmail.com <mailto:paullin3...@gmail.com>> 于2021年9月24日周五 > 上午12:26写道： > Sorry, I mean the relation between Flink Configuration and TableConfig, not > TableEnv. > > Best, > Paul Lam > > Paul Lam <paullin3...@gmail.com <mailto:paullin3...@gmail.com>> 于2021年9月24日周五 > 上午12:24写道： > Hi all, > > Currently, Flink creates a new Configuration in TableConfig of > StreamTableEnvironment, and synchronizes options in it back to the > Configuration of the underlying StreamExecutionEnvironment afterward. > However, only "relevant" options are set back [1], others are dropped > silently. That blocks users from overriding options like > DeploymentOptions.ATTACHED from TableConfig. So I'm wondering the reason why > not merge all options from TableConfig into the Configuration, and what's the > relation between Configuration and TableEnv? > > Thanks a lot! > > [1] > https://github.com/apache/flink/blob/36ff71f5ff63a140acc634dd1d98b2bb47a76ba5/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamExecutionEnvironment.java#L904 > > <https://github.com/apache/flink/blob/36ff71f5ff63a140acc634dd1d98b2bb47a76ba5/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/StreamExecutionEnvironment.java#L904> > > Best, > Paul Lam >
