Hi all,
The reference page for ALTER TABLE[1] correctly has the synopsis:
CLUSTER ON <replaceable class="PARAMETER">index_name</replaceable>
but later leaves off the "ON" keyword:
<term><literal>CLUSTER</literal></term>
I think the latter description should match the former, especially
since 'ON' is mandatory; small patch attached.
Josh
[1] http://www.postgresql.org/docs/devel/static/sql-altertable.html