[GitHub] [flink] JingsongLi opened a new pull request #10147: [FLINK-14676][table-planner-blink] Introduce parallelism inference for InputFormatTableSource

[GitBox <gi...@apache.org>]

JingsongLi opened a new pull request #10147: [FLINK-14676][table-planner-blink] Introduce parallelism inference for InputFormatTableSource
URL: https://github.com/apache/flink/pull/10147
 
 
   
   ## What is the purpose of the change
   
   FLINK-12801 has introduce parallelism setting for table, but because TableSource generate DataStream, maybe DataStream is not a real source, that will lead to some shuffle errors. So FLINK-13494 remove these implementations.
   
   In this ticket, I would like to introduce parallelism inference only for InputFormatTableSource, the RowCount of InputFormatTableSource is more accurate than downstream stages. It is worth to automatically generate its parallelism.
   
   ## Brief change log
   
   Add infer related config options.
   inferParallelism when is batch mode and InputFormatTableSource
   
   ## Verifying this change
   
   BatchExecResourceTest
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): no
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: no
     - The serializers: no
     - The runtime per-record code paths (performance sensitive):no 
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: no
     - The S3 file system connector: no
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes)
     - If yes, how is the feature documented? (JavaDocs)
   

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