Re: CLUSTER on partitioned index

For v10-0002-Implement-CLUSTER-of-partitioned-table.patch :

or that an partitioned index was previously set clustered.

'an partitioned index' -> a partitioned index

+ * Return a List of tables and associated index, where each index is a

associated index -> associated indices

For cluster():

-       rel = table_open(tableOid, NoLock);
+       rel = table_open(tableOid, ShareUpdateExclusiveLock);

Considering the comment preceding cluster() (forced to acquire exclusive locks on all the tables), maybe add a comment explaining why it is safe to take ShareUpdateExclusiveLock.

+cluster_multiple_rels(List *rvs, int options)

I think the multiple in the method name is not needed since the relation is in plural.

Cheers