Re: [HACKERS] Help: fmgr_info: function 0: cache lookup failed

darcy@druid.net ("D'Arcy" "J.M." Cain) writes:
> darcy=> select * from x where g = '12345-0000';
> ERROR:  fmgr_info: function 0: cache lookup failed

> As you can see, the select worked until I added the index.

This is a bit of a reach, but maybe it would work if you added
commutator links to your operator definitions?  You should add 'em
anyway on general principles.

If that *does* fix it, I'd say it's still a bug; index operators
should not have to have commutator links.

Next step would be to burrow in with a debugger and figure out what
function the thing thinks it's trying to call.  A backtrace from
the call to elog() would help here.
        regards, tom lane