bruce wrote:
> bruce wrote:
> > Dave Page wrote:
> > > This was posted as a documentation comment:
> > >
> > > to_char(interval '0d 0h 12m 44s', 'DD HH MI SS');
> > > with HH and HH12 will return 12 instead of 0.
> > >
> > > Testing on 8.4.1, it does seem to be the case that you get "00 12 12
> > > 44". Seems bogus to me, but am I and the OP missing something?
> >
> > Fixed with the attached patch. I think HH and HH24 should be the same
> > for intervals. It is hard to explain why zero hours should show as
> > '12' for intervals.
>
> Oops, I needed a second patch to fix hours > 12 for intervals. Patch
> attached and applied. It will now report the full hours of the
> interval.
We currently have this in our documentation:
<function>to_char(interval)</function> formats <literal>HH</> and <literal>HH12</> as hours in a single
day,while <literal>HH24</> can output hours exceeding a single day, e.g., >24.
This seems pretty confusing because HH/HH12 formats as hours in a single
1/2 day, 12 hours, and it really does wall-clock time, zero hours is 12,
and for intervals it does the right thing now and prints the interval
hours.
We also have these range definitions:
<row> <entry><literal>HH12</literal></entry> <entry>hour of day (01-12)</entry> </row>
<row> <entry><literal>HH24</literal></entry> <entry>hour of day (00-23)</entry> </row>
HH24 could always be > 24 for intervals, and now HH12 can too for
intervals.
What should be changed here?
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.comPG East: http://www.enterprisedb.com/community/nav-pg-east-2010.do + If your life is a hard
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