Encoder/decoder for 'oid'

[int-index]

I want to query PostgreSQL system tables, such as pg_type:

There are stock decoders for int2, bool, char, etc, but I'm not sure what to use for columns of type oid or name.

[nikita-volkov]

I guess int8 should do it.

[int-index]

Do I make a PR with oid = int8 to hasql then? As a user I'd like to abstract over this coincidence and just find an oid decoder when looking for it on Hackage.

[nikita-volkov]

I agree that it should be added. If you wish to make a PR, please start with the "postgresql-binary" library, implementing a test for the codec in the same style as the other tests there.