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https://issues.apache.org/jira/browse/FLINK-14672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16978118#comment-16978118
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Zheng Hu commented on FLINK-14672:
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[Here|https://github.com/openinx/flink/commit/0c8e448d08c8c8ede9cf9819e2b3f0a55301ba12]
is the rough patch for above discussion, still have some UT issues. Once fix
those issues, will put in on reviewing board. Thanks.
> Make Executor stateful in sql client
> ------------------------------------
>
> Key: FLINK-14672
> URL: https://issues.apache.org/jira/browse/FLINK-14672
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Client
> Reporter: Kurt Young
> Assignee: Zheng Hu
> Priority: Major
>
> Currently sql client is stateless, it read config files into `Environment`
> and recorded all session changes into `SessionContext`.
> Each time sql client want to execute a new command, we have to first
> construct `ExecutionContext` by combining `Environment` and `SessionContext`,
> and then transfer all information into a new `EnvironmentInstance`.
> It works well before but kind of hard to extend now. One example is support
> creating table in sql client. We have to remember create statements and
> replay them every time we want to execute a new command.
> If we can make sql client stateful, and table environment be the state of sql
> client, things will be much more easier.
> This Jira should revisit all related classes, and define a clean relationship
> between old roles after making sql client stateful.
>
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