SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function CAST (children 1)
     ExpressionList (children 2)
      Function array (children 1)
       ExpressionList (children 1)
        Function arrayElement (children 1)
         ExpressionList (children 2)
          Literal Array_[UInt64_1]
          Literal UInt64_1
      Literal \'Array(UInt32)\'
