Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16608#discussion_r102536886
--- 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 --
Yes. Update the description and provide an example to users? Maybe hardcode
the function name instead of using `_FUNC_`?
```
@ExpressionDescription(
usage = "_FUNC_(expr) - Separates the elements of array `expr` into
multiple rows, or the elements of map `expr` into multiple rows and columns.",
extended = """
Examples:
> SELECT _FUNC_(array(10, 20));
10
20
""")
```
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