Re: Obtaining the Julian Day from a date

"Karl O. Pinc" <kop@meme.com> writes:
>      RETURN day_zero + CAST (julian_day || ' days' AS INTERVAL);

That's certainly the hard way.  Just use the date + integer operator
(ie, "RETURN day_zero + julian_day").

>      day_zero CONSTANT DATE := CAST (0 AS DATE);

Does that really work?  I get

regression=# select  CAST (0 AS DATE);
ERROR:  cannot cast type integer to date

            regards, tom lane