SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function substring (children 1)
     ExpressionList (children 3)
      Function hex (children 1)
       ExpressionList (children 1)
        Function generateUUIDv7 (children 1)
         ExpressionList
      Literal UInt64_13
      Literal UInt64_1