Binary cursor field

[ThingsIDoForLove]

I am using UUID as the primary key and choosing [:inserted_at, :id] as cursor fields.
it successfully gets encode/decode. but while executing in Postgres it produces the following error.

(DBConnection.EncodeError) Postgrex expected a binary of 16 bytes, got "6f99aeef-a057-4562-8ef6-d35e310b3593". Please make sure the value you are passing matches the definition in your table or in your query or convert the value accordingly.

so is there a workaround for this? maybe someway to customize cursor encode/decode

[sgerrand]

So that we understand your problem in a little bit more detail, are you able to provide a working example of your issue?