Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> The real question here is whether the table should continue to be usable
> in a degraded state until it's reindexed.
It certainly will be, as long as your notion of "usable in a degraded
state" doesn't include issuing queries that would prefer to use the broken
index. The discussion is about what exactly should happen if you do that.
regards, tom lane