James,
* James Cloos (cloos@xxxxxxxxxxx) wrote:
> I've for some time used:
>
> (now()::timestamp without time zone - 'epoch'::timestamp without time zone)::reltime::integer
>
> to get the current seconds since the epoch. The results are consistant
> with date +%s.
>
> (Incidently, is there a better way in 9.4?)
Uh, select extract('epoch' from now()); ?
> But I found the 'epoch'::timestamp + $THAT_VALUE::reltime was off.
>
> I consitantly get 1970-01-01 06:00 plus a fraction of a second from:
>
> select now() - ((now()::timestamp without time zone - 'epoch'::timestamp without time zone)::reltime::integer)::reltime;
>
> The machines on which I've tried it all have localtime == UTC.
>
> Am I missing something obvious?
The only thing I'd say about this is that you *really* want to use
timestamptz in PG for storing timestamps.
> Also, is there any way to get the equiv of date +%s%N as a numeric or a
> double precision?
See above.
Thanks!
Stephen
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