Mention related ALTER TABLE variants in documentation for CLUSTER.

As suggested by Andy Lester.

diff --git a/doc/src/sgml/ref/cluster.sgml b/doc/src/sgml/ref/cluster.sgml
index 2f06251b292b93e1b6d6cb1da69a5acf271ad5fd..e7ac6c7967713cd2459be9e996de9876e49eb8aa 100644 (file)
--- a/doc/src/sgml/ref/cluster.sgml
+++ b/doc/src/sgml/ref/cluster.sgml
@@ -1,5 +1,5 @@
 
 
@@ -55,7 +55,10 @@ CLUSTER [VERBOSE]
    When a table is clustered, PostgreSQL
    remembers which index it was clustered by.  The form
    CLUSTER table_name
-   reclusters the table using the same index as before.
+   reclusters the table using the same index as before.  You can also
+   use the CLUSTER or SET WITHOUT CLUSTER
+   forms of  to set the index to be used for
+   future cluster operations, or to clear any previous setting.