Peter Eisentraut <peter.eisentr...@enterprisedb.com> writes: > I think an error message like > "unexpected null value in system cache %d column %d" > is sufficient. Since these are "can't happen" errors, we don't need to > spend too much extra effort to make it prettier.
I'd at least like to see it give the catalog's OID. That's easily convertible to a name, and it doesn't tend to move around across PG versions, neither of which are true for syscache IDs. Also, I'm fairly unconvinced that it's a "can't happen" --- this would be very likely to fire as a result of catalog corruption, so it would be good if it's at least minimally interpretable by a non-expert. Given that we'll now have just one copy of the code, ISTM there's a good case for doing the small extra work to report catalog and column by name. regards, tom lane