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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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-->
<refentry id="fn_nm_max_notnull">
<refmeta>
<refentrytitle>__max_notnull</refentrytitle>
<refmiscinfo>number</refmiscinfo>
</refmeta>
<refnamediv>
<refname>__max_notnull</refname>
<refpurpose>Returns maximum value among all its arguments, ignoring NULLs entirely.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn___max_notnull">
<funcprototype id="fproto___max_notnull">
<funcdef>any <function>__max_notnull</function></funcdef>
<paramdef><parameter>arg1</parameter> any</paramdef>
<paramdef><parameter>arg2</parameter> any</paramdef>
<paramdef><parameter>...</parameter></paramdef>
<paramdef><parameter>argN</parameter> any</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc___max_notnull"><title>Description</title>
<para>The function returns the maximum value among all values in all its arguments by
ignoring NULLs entirely.</para>
</refsect1>
<refsect1 id="params___max_notnull"><title>Parameters</title>
<refsect2><title>argI</title>
<para>Values which can be with type float, integer etc.</para></refsect2>
</refsect1>
<refsect1 id="examples___max_notnull"><title>Examples</title>
<example id="ex___max_notnull"><title></title>
<para><emphasis>Example 1</emphasis></para>
<screen><![CDATA[
SQL> select __max_notnull (null, 1, 0);
__max_notnull
VARCHAR
_______________________________________________________________________________
1
1 Rows. -- 16 msec.
SQL> select __max (null, 1, 0);
__max
VARCHAR
_______________________________________________________________________________
NULL
1 Rows. -- 0 msec.
]]></screen>
<para><emphasis>Example 2</emphasis></para>
<programlisting><![CDATA[
SQL> SPARQL
INSERT INTO GRAPH <http://mygraph.com>
{
<http://mygraph2.com/pricing/#QVal1> <price1> 1 ; <price3> 5 .
<http://mygraph2.com/pricing/#QVal2> <price2> 1 ; <price3> 4 .
<http://mygraph2.com/pricing/#QVal3> <price1> 6 ; <price2> 2 .
};
Insert into <http://mygraph.com>, 6 (or less) triples -- done
No. of rows in result: 1
SQL> SPARQL SELECT ?s, (bif:__max_notnull (?pr1, ?pr2, ?pr3))
FROM <http://mygraph.com>
WHERE
{
{
SELECT DISTINCT ?s
WHERE
{
?s ?p ?pr .
FILTER (?p in (<price1>, <price2>, <price3>))
}
}
OPTIONAL { ?s <price1> ?pr1 }
OPTIONAL { ?s <price2> ?pr2 }
OPTIONAL { ?s <price3> ?pr3 }
};
Query result:
s callret-1
VARCHAR VARCHAR
_______________________________________________
http://mygraph2.com/pricing/#QVal2 4
http://mygraph2.com/pricing/#QVal1 5
http://mygraph2.com/pricing/#QVal3 6
No. of rows in result: 2
]]></programlisting>
</example>
</refsect1>
<refsect1 id="seealso___max_notnull">
<title>See Also</title>
<para><link linkend="fn_nm_max"><function>__max()</function></link></para>
<para><link linkend="fn_nm_min"><function>__min()</function></link></para>
<para><link linkend="fn_nm_min_notnull"><function>__min_notnull()</function></link></para>
</refsect1>
</refentry>
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