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<?xml version="1.0" encoding="ISO-8859-1"?>
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- project.
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- Copyright (C) 1998-2018 OpenLink Software
-
- This project is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; only version 2 of the License, dated June 1991.
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- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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-->
<refentry id="fn_adjust_timezone">
<refmeta>
<refentrytitle>adjust_timezone</refentrytitle>
<refmiscinfo>time</refmiscinfo>
</refmeta>
<refnamediv>
<refname>adjust_timezone</refname>
<refpurpose>returns its first argument with unchanged GMT value but new timezone offset, as it is specified by the
second argument</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_adjust_timezone">
<funcprototype id="fproto_adjust_timezone">
<funcdef>datetime <function>adjust_timezone</function></funcdef>
<paramdef>in <parameter>dt</parameter> datetime</paramdef>
<paramdef>in <parameter>tz_offset</parameter> integer</paramdef>
<paramdef><optional>in <parameter>ignore_timezone</parameter> integer</optional></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_adjust_timezone"><title>Description</title>
<para>The function returns its first argument with unchanged GMT value but new timezone offset, as it is specified by the
second argument. If the first argument is timezoneless and third argument is missing or zero then error 22023 is signaled.
If the first argument is timezoneless and third argument is nonzero then no error is signaled and the argument is handled
like it is a GMT value.</para>
</refsect1>
<refsect1 id="params_adjust_timezone"><title>Parameters</title>
<refsect2>
<title>dt</title>
<para>Datetime value.</para>
</refsect2>
<refsect2>
<title>tz_offset</title>
<para>Timezone offset.</para>
</refsect2>
<refsect2>
<title>ignore_timezone</title>
<para>Flag.</para>
</refsect2>
</refsect1>
<refsect1 id="examples_adjust_timezone"><title>Examples</title>
<example id="ex_adjust_timezone"><title>Simple example</title>
<para></para>
<screen>
SQL> SELECT adjust_timezone(cast('2014-12-31 15:00-12:00' as datetime),0,1) ;
DATETIME
2015-01-01 03:00:00
No. of rows in result: 1
</screen>
</example>
</refsect1>
<refsect1 id="seealso_adjust_timezone"><title>See Also</title>
<para><link linkend="fn_now"><function>now</function></link></para>
<para><link linkend="fn_timezone"><function>timezone</function></link></para>
<para><link linkend="fn_forget_timezone"><function>forget_timezone</function></link></para>
<para><link linkend="fn_is_timezoneless"><function>is_timezoneless</function></link></para>
<para><link linkend="fn_rdf_now_impl"><function>rdf_now_impl</function></link></para>
<para><link linkend="fn_current_timestamp"><function>current_timestamp</function></link></para>
<para><link linkend="fn_curdatetime"><function>curdatetime</function></link></para>
<para><link linkend="fn_curdatetimeoffset"><function>curdatetimeoffset</function></link></para>
<para><link linkend="fn_curutcdatetime"><function>curutcdatetime</function></link></para>
<para><link linkend="fn_sysutcdatetime"><function>sysutcdatetime</function></link></para>
<para><link linkend="fn_stringdate"><function>stringdate</function></link></para>
<para><link linkend="fn_datestring"><function>datestring</function></link></para>
</refsect1>
</refentry>
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