Allow to_char(interval) and to_char(time) to use AM/PM specifications.

Map them to a single day, so '30 hours' is 'AM'.

Have to_char(interval) and to_char(time) use "HH", "HH12" as 12-hour
intervals, rather than bypass and print the full interval hours.  This
is neeeded because to_char(time) is mapped to interval in this function.
Intervals should use "HH24", and document suggestion.

Allow "D" format specifiers for interval/time.

1 files changed, 9 insertions, 1 deletions

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 7d603ef9782..f3df6181798 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -1,5 +1,5 @@
 <!--
-$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.296 2005/11/28 23:18:48 momjian Exp $
+$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.297 2005/12/03 16:45:05 momjian Exp $
 PostgreSQL documentation
 -->
 
@@ -4749,6 +4749,14 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
         <function>extract</function> function.
       </para>
      </listitem>
+
+     <listitem>
+      <para><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. &gt;24.
+      </para>
+     </listitem>
+
     </itemizedlist>
    </para>