afo...@gmail.com writes:
> This query:
> select
> '2012-01-31'::date + '1 month'::interval

> Produces this result:
> "2012-02-29 00:00:00"

> 2012-02-29 is not a valid date.  February only goes to 28 days.

Uh, 2012 was a leap year, and so 2012-02-29 is a perfectly valid date.

> I am not sure what the expected behavior should be, but what I was expecting
> is (in the above instance):
> Adding one month to 2012-01-31 would yield the last day of February

It did.

                        regards, tom lane


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