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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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- WITHOUT ANY WARRANTY; without even the implied warranty of
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- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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-->
<refentry id="fn_msec_time">
<refmeta>
<refentrytitle>msec_time</refentrytitle>
<refmiscinfo>time</refmiscinfo>
</refmeta>
<refnamediv>
<refname>msec_time</refname>
<refpurpose>Get number of milliseconds from system epoch</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_msec_time">
<funcprototype id="fproto_msec_time">
<funcdef><function>msec_time</function></funcdef>
<void />
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_msec_time"><title>Description</title>
<para><function>msec_time</function> returns the number of milliseconds since system epoch. It is useful for benchmarking purposes, timing operations, etc.</para>
</refsect1>
<refsect1 id="params_msec_time"><title>Parameters</title>
<refsect2><title>No parameters</title>
<para>The function does not take parameters.</para>
</refsect2>
</refsect1>
<refsect1 id="ret_msec_time"><title>Return Values</title>
<para>A 32-bit <type>integer</type> no. of milliseconds since system epoch.</para>
</refsect1>
<refsect1 id="examples_msec_time"><title>Examples</title>
<example id="ex_msec_time_1"><title>Simple example</title>
<para>Time a function</para>
<screen>
create procedure
fib (in n integer)
{
if (n <= 2) return 1;
return fib (n - 1) + fib (n - 2);
}
;
create procedure
time_fib (in n integer)
{
declare t,i integer;
declare msg varchar;
result_names (msg);
t := msec_time();
i := fib (n);
result (sprintf ('fib (%d) is %d, got it in %d milliseconds.',
n, i, msec_time() - t));
}
;
SQL> time_fib(10);
msg
VARCHAR NOT NULL
_______________________________________________________________________________
fib (10) is 55, got it in 10 milliseconds.
1 Rows. -- 21 msec.
</screen>
</example>
</refsect1>
<refsect1 id="seealso_msec_time"><title>See Also</title>
<para><link linkend="fn_now"><function>now</function></link></para>
</refsect1>
</refentry>
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