Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18574#discussion_r126349037
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
---
@@ -112,7 +112,12 @@ class SimpleFunctionRegistry extends FunctionRegistry {
throw new AnalysisException(s"undefined function $name")
}
}
- func(children)
+ try {
+ func(children)
--- End diff --
This is a scala function. It might be harder to do it.
If using the case match, it might be looks like?
```
func match {
case f: Function0[_] if children.size != 0 => ...
case f: Function1[_, _] if children.size != 1 => ...
...
```
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