Tatsuo Ishii <ishii(at)postgresql(dot)org> writes:
> Or you could just #undef KEEPONLYALNUM in trgm.h. But I'm not sure
> this is the right thing for you.
It's not a practical solution for people working with prebuilt Postgres
versions, which is most people. I don't object to finding a way to
provide a "not-space" behavior instead of an "is-alnum" behavior,
but as noted upthread a GUC isn't the right way. How do you feel
about a new set of functions with an additional flag argument of
some sort?
regards, tom lane