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Add mention that UTC really means UT1.

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Backpatch to 9.1.
This commit is contained in:
Bruce Momjian 2011-09-05 15:37:58 -04:00
parent 0b88af150e
commit 7cb99b2696
2 changed files with 6 additions and 2 deletions
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4
doc/src/sgml/catalogs.sgml
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@ -8341,7 +8341,9 @@
The view <structname>pg_timezone_names</structname> provides a list The view <structname>pg_timezone_names</structname> provides a list
of time zone names that are recognized by <command>SET TIMEZONE</>, of time zone names that are recognized by <command>SET TIMEZONE</>,
along with their associated abbreviations, UTC offsets, along with their associated abbreviations, UTC offsets,
and daylight-savings status. and daylight-savings status. (Technically,
<productname>PostgreSQL</productname> uses <acronym>UT1</> rather
than UTC because leap seconds are not handled.)
Unlike the abbreviations shown in <link Unlike the abbreviations shown in <link
linkend="view-pg-timezone-abbrevs"><structname>pg_timezone_abbrevs</structname></link>, many of these names imply a set of daylight-savings transition linkend="view-pg-timezone-abbrevs"><structname>pg_timezone_abbrevs</structname></link>, many of these names imply a set of daylight-savings transition
date rules. Therefore, the associated information changes across local DST date rules. Therefore, the associated information changes across local DST

4
doc/src/sgml/func.sgml
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@ -6898,7 +6898,9 @@ SELECT EXTRACT(SECOND FROM TIME '17:12:28.5');
<para> <para>
The time zone offset from UTC, measured in seconds. Positive values The time zone offset from UTC, measured in seconds. Positive values
correspond to time zones east of UTC, negative values to correspond to time zones east of UTC, negative values to
zones west of UTC. zones west of UTC. (Technically,
<productname>PostgreSQL</productname> uses <acronym>UT1</> because
leap seconds are not handled.)
</para> </para>
</listitem> </listitem>
</varlistentry> </varlistentry>