# `Replicant.Decoder.Messages.Update`
[🔗](https://github.com/baselabs/replicant/blob/v0.3.1/lib/replicant/decoder/messages.ex#L83)

`U` — a row update; carries new values and, if available, the key or old tuple.

# `t`

```elixir
@type t() :: %Replicant.Decoder.Messages.Update{
  changed_key_tuple_data: tuple() | nil,
  old_tuple_data: tuple() | nil,
  relation_id: non_neg_integer() | nil,
  tuple_data: tuple() | nil,
  xid: non_neg_integer() | nil
}
```

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*Consult [api-reference.md](api-reference.md) for complete listing*