viirya commented on a change in pull request #34642:
URL: https://github.com/apache/spark/pull/34642#discussion_r766278351
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
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@@ -71,6 +71,11 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with
Logging with Serializ
val id: Int = SparkPlan.newPlanId()
+ /**
+ * Return true if this stage of the plan supports row-based execution.
Review comment:
> supportsColumnar: this plan can support columnar output, alongside the
default row-based output which every plan supports.
Hmm, seems not exactly? Not every plan supports row-based output.
`prefersColumnar` seems redundant? As I see, we usually prefer columnar
output already.
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