Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/14568#discussion_r74140971
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/MonotonicallyIncreasingID.scala
---
@@ -40,13 +40,14 @@ import org.apache.spark.sql.types.{DataType, LongType}
represent the record number within each partition. The assumption is
that the data frame has
less than 1 billion partitions, and each partition has less than 8
billion records.""",
extended = "> SELECT _FUNC_();\n 0")
-case class MonotonicallyIncreasingID() extends LeafExpression with
Nondeterministic {
+case class MonotonicallyIncreasingID(offset: Long = 0) extends
LeafExpression
--- End diff --
It calls one of these constructors:
https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlus.scala#L62-L72
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