Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/16608#discussion_r96276717
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -2879,6 +2888,15 @@ object functions {
def posexplode(e: Column): Column = withExpr { PosExplode(e.expr) }
/**
+ * Creates a new row for each element with position in the given array
or map column.
+ * Unlike posexplode, if the array/map is null or empty then the row (0,
null) is produced.
+ *
+ * @group collection_funcs
+ * @since 2.2.0
+ */
+ def outer_posexplode(e: Column): Column = withExpr { new
OuterPosExplode(e.expr) }
--- End diff --
Naming: `posexplode_outer`
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