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Doc: explain that "timestamp - timestamp" applies justify_hours(). 

Back-patch to v13; before that, there's not really space for this
kind of detail.

Discussion: https://postgr.es/m/c1696f68-fa8d-7759-6a9c-eb293ab1bbc9@gmx.net
This commit is contained in:
Tom Lane 2020-06-26 13:54:01 -04:00
parent 81d46ea12c
commit eca08f58d0
1 changed files with 4 additions and 3 deletions
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doc/src/sgml/func.sgml
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@ -8412,11 +8412,12 @@ SELECT regexp_match('abc01234xyz', '(?:(.*?)(\d+)(.*)){1,1}');
<returnvalue>interval</returnvalue>
</para>
<para>
Subtract timestamps
Subtract timestamps (converting 24-hour intervals into days,
similarly to <function>justify_hours()</function>)
</para>
<para>
<literal>timestamp '2001-09-29 03:00' - timestamp '2001-09-27 12:00'</literal>
<returnvalue>1 day 15:00:00</returnvalue>
<literal>timestamp '2001-09-29 03:00' - timestamp '2001-07-27 12:00'</literal>
<returnvalue>63 days 15:00:00</returnvalue>
</para></entry>
</row>