comphead commented on issue #3929:
URL:
https://github.com/apache/datafusion-comet/issues/3929#issuecomment-5040531119
`array_compact` gets rewritten in runtime to lambda expression
```
lazy val lv = NamedLambdaVariable("arg",
child.dataType.asInstanceOf[ArrayType].elementType, true)
lazy val lambda = LambdaFunction(isNotNull(lv), Seq(lv))
override lazy val replacement: Expression =
KnownNotContainsNull(ArrayFilter(child, lambda))
```
So for `array_compact` we may want to fallback to codegen for now
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