PL/Python: Fix example

Revert "6f6b46c9c0ca3d96acbebc5499c32ee6369e1eec", which was broken.

Reported-by: Jonathan Rogers <jrogers@socialserve.com>

diff --git a/doc/src/sgml/plpython.sgml b/doc/src/sgml/plpython.sgml
index 3f0e6290bb2325a3534f22cb84cf3aacda5efcf1..ce9052b61b8a982ff5e415275080738012916f88 100644 (file)
--- a/doc/src/sgml/plpython.sgml
+++ b/doc/src/sgml/plpython.sgml
@@ -1044,7 +1044,11 @@ rv = plpy.execute(plan, ["name"], 5)
       <xref linkend="plpython-sharing">). For example:
 <programlisting>
 CREATE FUNCTION usesavedplan() RETURNS trigger AS $$
-    plan = SD.setdefault("plan", plpy.prepare("SELECT 1"))
+    if "plan" in SD:
+        plan = SD["plan"]
+    else:
+        plan = plpy.prepare("SELECT 1")
+        SD["plan"] = plan
     # rest of function
 $$ LANGUAGE plpythonu;
 </programlisting>