Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/16986#discussion_r117835124
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala
---
@@ -652,6 +653,299 @@ case class MapObjects private(
}
}
+object CollectObjectsToMap {
+ private val curId = new java.util.concurrent.atomic.AtomicInteger()
+
+ /**
+ * Construct an instance of CollectObjects case class.
+ *
+ * @param keyFunction The function applied on the key collection
elements.
+ * @param keyInputData An expression that when evaluated returns a key
collection object.
+ * @param keyElementType The data type of key elements in the collection.
+ * @param valueFunction The function applied on the value collection
elements.
+ * @param valueInputData An expression that when evaluated returns a
value collection object.
+ * @param valueElementType The data type of value elements in the
collection.
+ * @param collClass The type of the resulting collection.
+ */
+ def apply(
+ keyFunction: Expression => Expression,
+ keyInputData: Expression,
+ keyElementType: DataType,
+ valueFunction: Expression => Expression,
+ valueInputData: Expression,
+ valueElementType: DataType,
+ collClass: Class[_]): CollectObjectsToMap = {
+ val id = curId.getAndIncrement()
+ val keyLoopValue = s"CollectObjectsToMap_keyLoopValue$id"
+ val keyLoopIsNull = s"CollectObjectsToMap_keyLoopIsNull$id"
--- End diff --
do we need this? the map key can not be null by definition
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