Обсуждение: timestamp?

Hello,

Let assume that we have relation R01(id integer,ts timestamp)
Now I know that if I use PQgetvalue() for ts value, I'll get char*
to nullterminated string. How can I get time_t value for ts in
portable way (without parsing returned string)?
Sorry, if my English is not very understandable :-)


--
Igor Roboul, Unix System Administrator & Programmer @ sanatorium "Raduga",
Sochi, Russia
http://www.brainbench.com/transcript.jsp?pid=304744

Igor Roboul <igor@raduga.dyndns.org> writes:
> Let assume that we have relation R01(id integer,ts timestamp)
> Now I know that if I use PQgetvalue() for ts value, I'll get char*
> to nullterminated string. How can I get time_t value for ts in
> portable way (without parsing returned string)?

If you want to produce a time_t painlessly, the simplest way is not
to SELECT the raw timestamp, but rather date_part('epoch', timestamp).
This gives you back an integer number of seconds per Unix conventions,
which you just use atoi() on.  For example:

regression=# select date_part('epoch', now());
 date_part
-----------
 972673187
(1 row)

            regards, tom lane

On Fri, Oct 27, 2000 at 03:01:31PM -0400, Tom Lane wrote:
> This gives you back an integer number of seconds per Unix conventions,
> which you just use atoi() on.  For example:
>
> regression=# select date_part('epoch', now());
Thanx

--
Igor Roboul, Unix System Administrator & Programmer @ sanatorium "Raduga",
Sochi, Russia
http://www.brainbench.com/transcript.jsp?pid=304744