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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
- This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
- project.
-
- 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.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
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- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-
-->
<refentry id="fn_current_timestamp">
<refmeta>
<refentrytitle>current_timestamp</refentrytitle>
<refmiscinfo>time</refmiscinfo>
</refmeta>
<refnamediv>
<refname>current_timestamp</refname>
<refpurpose>returns the current transaction timestamp</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_current_timestamp">
<funcprototype id="fproto_current_timestamp">
<funcdef><function>current_timestamp</function></funcdef>
<paramdef></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_current_timestamp"><title>Description</title>
<para>Now returns the timestamp associated with current transaction as a <type>DATETIME</type>.</para>
<para>The function name refer to one function ( alias of <link linkend="fn_now"><function>now()</function></link> ) that
returns the timestamp of current transaction. It is the datetime of the beginning of current transaction with the
fractional part of seconds replaced with serial number of a transaction within the second. If
<code>TimezonelessDatetimes=0</code> then the time has local timezone offset (as it was set at the time of last
server start); otherwise it is timezoneless.</para>
</refsect1>
<refsect1 id="params_current_timestamp"><title>Parameters</title>
<para><function>current_timestamp</function> has no parameters.</para>
</refsect1>
<refsect1 id="ret_current_timestamp"><title>Return Types</title>
<para>A <type>DATETIME</type> timestamp.</para></refsect1>
<refsect1 id="errors_current_timestamp"><title>Errors</title>
<para><function>current_timestamp</function> does not return errors.</para>
</refsect1>
<refsect1 id="examples_current_timestamp"><title>Examples</title>
<example id="ex_current_timestamp"><title>Simple example</title>
<screen>
SQL>select current_timestamp ;
DATETIME
2015-05-05 03:36:41.225581
</screen>
</example>
</refsect1>
<refsect1 id="seealso_current_timestamp"><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_adjust_timezone"><function>adjust_timezone</function></link></para>
<para><link linkend="fn_rdf_now_impl"><function>rdf_now_impl</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_datestring"><function>datestring()</function></link></para>
<para><link linkend="dtcasting">casting</link></para>
<para><link linkend="fn_curdate"><function>curdate()</function>, <function>curdatetime()</function>,<function>curtime()</function></link></para>
</refsect1>
</refentry>
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