I wrote:
> David Rowley <david.row...@2ndquadrant.com> writes:
>> I've gone and implemented the dummy argument approach for
>> deserialization functions.

> How do you feel about the further idea of locking down the signatures
> to be exactly "serialize(internal) returns bytea" and "deserialize(bytea,
> internal) returns internal", and removing pg_aggregate.aggserialtype?
> I don't see very much value in allowing any other nominal transmission
> type besides bytea; and the less flexibility in these function signatures,
> the less chance of confusion/misuse of other internal-related functions.

Not hearing any objections, pushed that way.

                        regards, tom lane

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