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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/05/25 13:12:06 UTC

[GitHub] [arrow-datafusion] andygrove edited a comment on issue #424: Operator Ordering

andygrove edited a comment on issue #424:
URL: https://github.com/apache/arrow-datafusion/issues/424#issuecomment-847857451


   We may want to consider following Spark's approach here, since we are already implementing other methods such as `required_child_distribution` based on Spark.
   
   For sorting, Spark has:
   
   ```scala
   /** Specifies how data is ordered in each partition. */
   def outputOrdering: Seq[SortOrder] = Nil
   
   /** Specifies sort order for each partition requirements on the input data for this operator. */
   def requiredChildOrdering: Seq[Seq[SortOrder]]
   ```


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