SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayEnumerateUniq (children 1)
     ExpressionList (children 1)
      Function array (children 1)
       ExpressionList (children 3)
        Function toNullable (children 1)
         ExpressionList (children 1)
          Function toInt128 (children 1)
           ExpressionList (children 1)
            Literal UInt64_321
        Function toNullable (children 1)
         ExpressionList (children 1)
          Function toInt128 (children 1)
           ExpressionList (children 1)
            Literal UInt64_456
        Function toNullable (children 1)
         ExpressionList (children 1)
          Function toInt128 (children 1)
           ExpressionList (children 1)
            Literal UInt64_321