doc: improve CREATE RULE event list

Patch by Fujii Masao

Report by Emanuel Calvo

diff --git a/doc/src/sgml/ref/create_rule.sgml b/doc/src/sgml/ref/create_rule.sgml
index d3212b5e5a02e888517a02ec51adfa814161c3a5..677766a2d5e3659b15b122a02503f16f63c6c5b9 100644 (file)
--- a/doc/src/sgml/ref/create_rule.sgml
+++ b/doc/src/sgml/ref/create_rule.sgml
@@ -24,6 +24,10 @@ PostgreSQL documentation
 CREATE [ OR REPLACE ] RULE name AS ON event
     TO table_name [ WHERE condition ]
     DO [ ALSO | INSTEAD ] { NOTHING | command | ( command ; command ... ) }
+
+where event can be one of:
+
+    SELECT | INSERT | UPDATE | DELETE