From b4d7ea5f6e3cce29b0ba4a373d3a36aa2542d86b Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter_e@gmx.net>
Date: Mon, 26 Jul 2010 20:14:05 +0000
Subject: [PATCH] Add table creation and population to example
from John Gage
---
doc/src/sgml/xfunc.sgml | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/doc/src/sgml/xfunc.sgml b/doc/src/sgml/xfunc.sgml
index fcbf6407298..93bdf572f37 100644
--- a/doc/src/sgml/xfunc.sgml
+++ b/doc/src/sgml/xfunc.sgml
@@ -1,4 +1,4 @@
-<!-- $PostgreSQL: pgsql/doc/src/sgml/xfunc.sgml,v 1.150 2010/07/25 08:30:42 petere Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/xfunc.sgml,v 1.151 2010/07/26 20:14:05 petere Exp $ -->
<sect1 id="xfunc">
<title>User-Defined Functions</title>
@@ -861,10 +861,23 @@ SELECT * FROM getfoo(1) AS t1;
output parameters, like this:
<programlisting>
+CREATE TABLE tab (y int, z int);
+INSERT INTO tab VALUES (1, 2), (3, 4), (5, 6), (7, 8);
+
CREATE FUNCTION sum_n_product_with_tab (x int, OUT sum int, OUT product int)
-RETURNS SETOF record AS $$
+RETURNS SETOF record
+AS $$
SELECT $1 + tab.y, $1 * tab.y FROM tab;
$$ LANGUAGE SQL;
+
+SELECT * FROM sum_n_product_with_tab(10);
+ sum | product
+-----+---------
+ 11 | 10
+ 13 | 30
+ 15 | 50
+ 17 | 70
+(4 rows)
</programlisting>
The key point here is that you must write <literal>RETURNS SETOF record</>
--
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