Re: Error-safe user functions

Andres Freund <andres@anarazel.de> writes:
> Is there a guarantee that input functions are stable or immutable?

There's a project policy that that should be true.  That justifies
marking things like record_in as stable --- if the per-column input
functions could be volatile, record_in would need to be as well.
There are other dependencies on it; see e.g. aab353a60, 3db6524fe.

> We don't
> have any volatile input functions in core PG:

Indeed, because type_sanity.sql checks that.

            regards, tom lane