Joe Conway <mail@joeconway.com> writes:
> Notice that tsr is not empty at all on the first loop, but on the second
> loop it is empty every second time the trigger fires.
I think the issue is that now() isn't changing within the transaction,
so when you construct "tstzrange(lower(OLD.tr), now(), '[)')" using an
old row whose "lower(OLD.tr)" is already "now()", you get an empty range.
Probably using '[]' bounds would avoid the oddness.
regards, tom lane
