SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayReduce (children 1)
     ExpressionList (children 2)
      Literal \'firstValueRespectNulls\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal Array_[NULL, UInt64_10]
        Literal \'Array(Nullable(UInt8))\'
