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Document the behavior of STRICT VARIADIC functions.

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This commit is contained in:
Tom Lane 2010-02-14 00:48:12 +00:00
parent bbdf72b095
commit a9aad1b868
1 changed files with 8 additions and 1 deletions
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9
doc/src/sgml/ref/create_function.sgml
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@ -1,5 +1,5 @@
<!-- <!--
$PostgreSQL: pgsql/doc/src/sgml/ref/create_function.sgml,v 1.88 2009/10/08 02:39:14 tgl Exp $ $PostgreSQL: pgsql/doc/src/sgml/ref/create_function.sgml,v 1.89 2010/02/14 00:48:12 tgl Exp $
--> -->
<refentry id="SQL-CREATEFUNCTION"> <refentry id="SQL-CREATEFUNCTION">
@ -585,6 +585,13 @@ CREATE FUNCTION foo(int, int default 42) ...
existing calls of the function do not stop working when it is replaced. existing calls of the function do not stop working when it is replaced.
</para> </para>
<para>
If a function is declared <literal>STRICT</> with a <literal>VARIADIC</>
argument, the strictness check tests that the variadic array <emphasis>as
a whole</> is non-null. The function will still be called if the
array has non-null elements.
</para>
</refsect1> </refsect1>
<refsect1 id="sql-createfunction-examples"> <refsect1 id="sql-createfunction-examples">