Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/16608#discussion_r102593931
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
---
@@ -163,9 +163,11 @@ object FunctionRegistry {
expression[Abs]("abs"),
expression[Coalesce]("coalesce"),
expression[Explode]("explode"),
+ expressionGeneratorOuter[Explode]("explode_outer"),
--- End diff --
I am not super enthusiastic about this. We have three options here:
1. Leave as it is.
2. Remove the `outer_...` generators, and make a user use the `lateral view
outer ...` instead.
3. Create separate OuterGenerator classes for each one, and provide proper
documentation.
I am fine with any.
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