Re: [GENERAL] Unexpected interval comparison

Frazer McLean <frazer@frazermclean.co.uk> writes:
> I came across an unexpected comparison (tested on PostgreSQL 9.4 and
> 9.6) for intervals with a large difference in magnitude.

>   '1 year'::interval > '32618665 years'::interval;

> Is this a bug?

It looks like the problem is overflow of the result of interval_cmp_value,
because it's trying to compute

=# select '32618665'::int8 * 30 * 86400 * 1000000;
ERROR:  bigint out of range

It's not immediately obvious how to avoid that while preserving the same
comparison semantics :-(

            regards, tom lane