SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayElement (children 1)
     ExpressionList (children 2)
      Function materialize (children 1)
       ExpressionList (children 1)
        Function array (children 1)
         ExpressionList (children 2)
          Literal UInt64_13
          Function toNullable (children 1)
           ExpressionList (children 1)
            Literal UInt64_14
      Literal Int64_-9223372036854775808
