Re: Add strftime escapes to Log config

Peter Eisentraut wrote:
> On s?n, 2011-03-20 at 13:32 -0700, Josh Berkus wrote:
> > This page:
> >
> > http://www.postgresql.org/docs/8.3/static/runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-WHERE
> >
> > has the following text:
> >
> > The value is treated as a strftime pattern, so %-escapes can be used to
> > specify time-varying file names.
> >
> > However, nowhere in our docs do we list sample strftime escapes.  This
> > means that PG DBAs who are not programmers (and even some who are) end
> > up googling for them all the time.  So I would like to add the following
> > text:
> >
> > Useful excape codes which are available on most platforms include: %Y =
> > year, %m = month, %d = day of month, %H = hour, %M = minute, %a = short
> > weekday name, and %b = short month name.
>
> We could also link to
> <http://pubs.opengroup.org/onlinepubs/007908799/xsh/strftime.html>, for
> example.

Agreed.  I have applied the attached patch to 9.1 and head.

--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + It's impossible for everything to be true. +
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
new file mode 100644
index 4b35169..615b2b0
*** a/doc/src/sgml/config.sgml
--- b/doc/src/sgml/config.sgml
*************** local0.*    /var/log/postgresql
*** 3086,3091 ****
--- 3086,3095 ----
          any time-zone-dependent <literal>%</literal>-escapes, the computation
          is done in the zone specified
          by <xref linkend="guc-log-timezone">.)
+         The supported <literal>%</literal>-escapes are similar to those
+         listed in the Open Group's <ulink
+         url="http://pubs.opengroup.org/onlinepubs/009695399/functions/strftime.html">strftime
+         </ulink> specification.
          Note that the system's <systemitem>strftime</systemitem> is not used
          directly, so platform-specific (nonstandard) extensions do not work.
         </para>