[GitHub] [arrow-datafusion] andygrove opened a new issue #540: Ballista ShuffleReaderExec should be able to read from multiple locations per partition

Mon, 14 Jun 2021 00:15:24 -0700 


andygrove opened a new issue #540:
URL: https://github.com/apache/arrow-datafusion/issues/540


   **Is your feature request related to a problem or challenge? Please describe 
what you are trying to do.**
   As a step towards implementing true shuffle, we need `ShuffleReaderExec` to 
be able to read from multiple locations per partition instead of from a single 
location.
   
   **Describe the solution you'd like**
   `ShuffleReaderExec` should accept `Vec<Vec<PartitionLocation>>` instead of 
`Vec<PartitionLocation>`.
   
   **Describe alternatives you've considered**
   None
   
   **Additional context**
   None
   


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