jchen5 commented on code in PR #35975:
URL: https://github.com/apache/spark/pull/35975#discussion_r849991073
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sql/core/src/main/scala/org/apache/spark/sql/execution/limit.scala:
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@@ -182,6 +190,48 @@ case class GlobalLimitExec(limit: Int, child: SparkPlan)
extends BaseLimitExec {
copy(child = newChild)
}
+/**
+ * Skip the first `offset` elements then take the first `limit` of the
following elements in
+ * the child's single output partition.
Review Comment:
Can there be multiple output partitions in the case that the child was not
sorted?
In the case it wasn't sorted, we can return an arbitrary collection of rows
of the correct size, so it doesn't really matter, just trying to understand the
invariants.
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