Re: [I] Sort query won't get round-robin repartitioned if input is `MemTable` [datafusion]

[via GitHub]

alan910127 commented on issue #15088:
URL: https://github.com/apache/datafusion/issues/15088#issuecomment-2714819886

   I've tried
   
   - this:
     ```rust
       fn required_input_distribution(&self) -> Vec<Distribution> {
           vec![Distribution::UnspecifiedDistribution]
       }
   
       fn benefits_from_input_partitioning(&self) -> Vec<bool> {
           vec![true]
       }
     ```
   
   - and this:
     ```rust
       fn required_input_distribution(&self) -> Vec<Distribution> {
           if self.preserve_partitioning {
               vec![Distribution::UnspecifiedDistribution]
           } else {
               // global sort
               // TODO support RangePartition and OrderedDistribution
               let physical_exprs =
                   self.expr().iter().map(|e| Arc::clone(&e.expr)).collect();
               vec![Distribution::HashPartitioned(physical_exprs)]
           }
       }
   
       fn benefits_from_input_partitioning(&self) -> Vec<bool> {
           vec![!self.preserve_partitioning]
       }
     ```
   
   But both of these make the results have weird orders, not sure if I missed 
something


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