[GitHub] [spark] rdblue edited a comment on pull request #29066: [WIP][SPARK-23889] DataSourceV2: required sorting and clustering for writes

[GitBox <gi...@apache.org>]

rdblue edited a comment on pull request #29066:
URL: https://github.com/apache/spark/pull/29066#issuecomment-706329765


   Here's an extractor that should work:
   
   ```scala
   private[sql] object SortValue {
     def unapply(expr: Expression): Option[(Expression, SortDirection, NullOrdering)] = expr match {
       case sort: SortOrder =>
         Some(sort.expression, sort.direction, sort.nullOrdering)
       case _ =>
         None
     }
   }
   ```


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