Re: Binary data type with other output method

Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> I think all you need to do it this:
> Take the code for boolout() in src/backend/utils/adt/bool.c, adjust it
> and and make it a new function boolout2. Use pgxs to make it a loadable
> module.
> Then load it and adjust the catalog entry for the bool type to use
> boolout2 instead of boolout.

Then start fixing pg_dump, psql, and every other bit of client-side code
that expects the boolean columns in the system catalogs to read out as
't'/'f' ...

I think you'd really need a separate type. But have you considered
something simple like
CREATE DOMAIN boolint AS int CHECK (value = 0 OR value = 1)

regards, tom lane