[jira] [Created] (SPARK-30009) Replace Ordering.Double with Ordering.Double.TotalOrdering

["Sean R. Owen (Jira)" <ji...@apache.org>]

Sean R. Owen created SPARK-30009:
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             Summary: Replace Ordering.Double with Ordering.Double.TotalOrdering
                 Key: SPARK-30009
                 URL: https://issues.apache.org/jira/browse/SPARK-30009
             Project: Spark
          Issue Type: Sub-task
          Components: Spark Core, SQL
    Affects Versions: 3.0.0
            Reporter: Sean R. Owen
            Assignee: Sean R. Owen


Scala 2.12 replaces {{Ordering.Double}} with either of {{Ordering.Double.TotalOrdering}} (same behavior, NaN compares consistently) or {{Ordering.Double.IeeeOrdering}} (consistent with java.lang.Double.compare, NaN always compares false, for example). Neither is available in both versions, and it doesn't seem like a compat library exists to handle this.

This can be accomplished by inlining the implementation of {{Ordering.Double}} so that both can use it. Or, parallel source trees for 2.12 / 2.13. The latter wouldn't be worth it just for this, but I'm fairly sure a few things will require it anyway.



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