Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/10335#discussion_r47830108
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
---
@@ -210,6 +210,37 @@ case class Sort(
override def output: Seq[Attribute] = child.output
}
+case class Range(
+ start: Long,
+ end: Long,
+ step: Long,
+ numSlices: Int) extends LeafNode {
+ require(step != 0, "step cannot be 0")
+ val numElements: BigInt = {
+ val safeStart = BigInt(start)
+ val safeEnd = BigInt(end)
+ if ((safeEnd - safeStart) % step == 0 || safeEnd > safeStart ^ step >
0) {
+ (safeEnd - safeStart) / step
+ } else {
+ // the remainder has the same sign with range, could add 1 more
+ (safeEnd - safeStart) / step + 1
+ }
+ }
+
+ val output: Seq[Attribute] =
+ StructType(StructField("id", LongType, nullable = false) ::
Nil).toAttributes
+ /**
+ * Computes [[Statistics]] for this plan. The default implementation
assumes the output
+ * cardinality is the product of of all child plan's cardinality, i.e.
applies in the case
+ * of cartesian joins.
+ *
+ * [[LeafNode]]s must override this.
+ */
+ val sizeInBytes = LongType.defaultSize * numElements
--- End diff --
`protected`
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