It is not obvious that a function should be declared "RETURNS VOID" if it
is not supposed to return a value.
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There's also a user-comment on the 8.1 doc-page.
Joachim
Index: create_function.sgml
===================================================================
RCS file: /projects/cvsroot/pgsql/doc/src/sgml/ref/create_function.sgml,v
retrieving revision 1.68
diff -c -r1.68 create_function.sgml
*** create_function.sgml 16 Sep 2006 00:30:17 -0000 1.68
--- create_function.sgml 3 Nov 2006 03:51:37 -0000
***************
*** 152,158 ****
may be a base, composite, or domain type,
or may reference the type of a table column.
Depending on the implementation language it may also be allowed
! to specify <quote>pseudotypes</> such as <type>cstring</>.
</para>
<para>
When there are <literal>OUT</> or <literal>INOUT</> parameters,
--- 152,160 ----
may be a base, composite, or domain type,
or may reference the type of a table column.
Depending on the implementation language it may also be allowed
! to specify <quote>pseudotypes</> such as <type>cstring</>. If the
! function is not supposed to return a value, specify <literal>VOID</> as
! return type.
</para>
<para>
When there are <literal>OUT</> or <literal>INOUT</> parameters,
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