Tom Lane wrote:
> Tatsuo Ishii <t-ishii@sra.co.jp> writes:
> > How come 10 mons == 9 mons 30 days?
>
> Because for purposes of comparisons, type interval assumes 1 month
> == 30 days (cf. interval_cmp_internal). Pretty grotty, I agree,
> but it's not easy to see how to do better.
I guess if we knew the month we could do better. :-)
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