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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2022/06/04 20:06:26 UTC

[GitHub] [beam] damccorm opened a new issue, #20901: TypeDescriptor information gets lost when applying multiple DoFn on Composite Transform

damccorm opened a new issue, #20901:
URL: https://github.com/apache/beam/issues/20901

   While working on BEAM-12384 to preserve correctly the typeDescriptor of the Read transform. I noticed that ParDo passes the outputType information into the next transforms by taking the output of `getOutputTypeDescriptor` specified in the `DoFn`, but the subsequent transform does not get the full inputTypeDescriptor.
   
   There are other open questions:
   1. How can we make this easier for users who rarely override the getOutputTypeDescriptor?
   2. Where the typeDescriptor should come in the SDF case, from the Restriction?
   
   For more details:
   https://github.com/apache/beam/pull/14854#issuecomment-848793500
   
    
   
    
   
    
   
   Imported from Jira [BEAM-12420](https://issues.apache.org/jira/browse/BEAM-12420). Original Jira may contain additional context.
   Reported by: iemejia.


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