[jira] [Assigned] (FLINK-14817) "Streaming Aggregation" document contains misleading code examples

["Jark Wu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-14817?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jark Wu reassigned FLINK-14817:
-------------------------------

    Assignee: Victor Wong

> "Streaming Aggregation" document contains misleading code examples
> ------------------------------------------------------------------
>
>                 Key: FLINK-14817
>                 URL: https://issues.apache.org/jira/browse/FLINK-14817
>             Project: Flink
>          Issue Type: Bug
>          Components: Documentation
>    Affects Versions: 1.9.1
>            Reporter: Victor Wong
>            Assignee: Victor Wong
>            Priority: Major
>
> In the document of [Streaming Aggregation |https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/tuning/streaming_aggregation_optimization.html] , there are some misleading code examples, e.g.
> {code:java}
> // instantiate table environment
> TableEnvironment tEnv = ...tEnv.getConfig()        // access high-level configuration
>   .getConfiguration()   // set low-level key-value options
>   .setString("table.exec.mini-batch.enabled", "true")  // enable mini-batch optimization
>   .setString("table.exec.mini-batch.allow-latency", "5 s") // use 5 seconds to buffer input records
>   .setString("table.exec.mini-batch.size", "5000"); // the maximum number of records can be buffered by each aggregate operator task
> {code}
> It seems `Configuration` supports method chaining, while it's not true since the return type of `Configuration#setString` is Void.
>  
> So what about making `Configuration` support method chaining, or updating the documentation?
>  



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