Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/13971#discussion_r69008018
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
---
@@ -141,11 +148,33 @@ case class Explode(child: Expression) extends
UnaryExpression with Generator wit
val rows = new Array[InternalRow](inputMap.numElements())
var i = 0
inputMap.foreach(kt, vt, (k, v) => {
- rows(i) = InternalRow(k, v)
+ rows(i) = if (position) InternalRow(i, k, v) else
InternalRow(k, v)
i += 1
})
rows
}
}
}
}
+
+/**
+ * Given an input array produces a sequence of rows for each value in the
array.
+ */
+// scalastyle:off line.size.limit
+@ExpressionDescription(
+ usage = "_FUNC_(a) - Separates the elements of array a into multiple
rows, or the elements of map a into multiple rows and columns.")
+// scalastyle:on line.size.limit
+case class Explode(child: Expression)
+ extends ExplodeBase(child, position = false) with Serializable {
+}
+
+/**
+ * Given an input array produces a sequence of rows for each position and
value in the array.
--- End diff --
btw since the expression description might be difficult to see without line
wrapping, it'd also be better to put an example here.
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