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Revert recent change of to_char('HH12') handling for intervals; instead

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improve documentation, and add C comment.
This commit is contained in:
Bruce Momjian
2010-02-23 16:14:26 +00:00
parent 4f56dc3fb4
commit a54803149a
2 changed files with 8 additions and 7 deletions
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7
doc/src/sgml/func.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.505 2010/02/19 00:15:25 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.506 2010/02/23 16:14:25 momjian Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@ -5317,8 +5317,9 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
<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.
<literal>HH12</> as shown on a 12-hour clock, i.e. zero hours
and 36 hours output as <literal>12</>, while <literal>HH24</>
outputs the full hour value, which can exceed 23 for intervals.
</para>
</listitem>