Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18574#discussion_r126330636
--- 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 --
Although this is the simplest fix, I think ideally it's the
`FunctionBuilder`'s responsibility to check invalid number of arguments, like
the built-in function's `FunctionBuilder` does.
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