Aleksander Alekseev <aleksan...@timescale.com> writes: > One thing that I couldn't immediately figure out is why 0 hash value > is treated as a magic invalid value in TypeCacheTypCallback():
I've not read this patch, but IIRC in some places we have a convention
that hash value zero is passed for an sinval reset event (that is,
"flush all cache entries").
regards, tom lane
