Github user mgaido91 commented on the issue:
https://github.com/apache/spark/pull/22131
sorry, I wasn't very specific in my previous comment. I meant adding a
method like:
```
def validateBinding(e: HigherOrderFunction): Expression = {
e.bind { case (f: LambdaFunction, dataTypes) =>
f.arguments.zip(dataTypes).foreach {
case (arg, (dt, n)) =>
assert(arg.dataType == dt)
assert(arg.nullable == n)
}
f
}
}
```
and then validate all the expressions, so use it like:
```
validateBinding(ArrayTransform(....))
```
What do you think about this?
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