StephanEwen opened a new pull request #13461:
URL: https://github.com/apache/flink/pull/13461


   Some stubs for implementing file formats for the new source API.
   
   The readers are fairly complete in their implementation, what is usually 
missing is the construction of the reader schema/conversion-logic/etc from the 
type or schema definitions.
   
   These illustrate the following concepts:
     - ORC: A very performance sensitive `BulkFormat`, concerned with avoiding 
object allocations (splittable).
     - Avro: A stream format that is splittable.
     - CSV: A simple stream format that is not splittable.
   


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