Update obsolete comment.
Noted by Justin Pryzby, though I chose to just rip out the stale text,
as it's in no way relevant to this particular function.
Discussion:
@@ -1522,8 +1522,8 @@ finish_heap_swap(Oid OIDOldHeap, Oid OIDNewHeap,
/*
* Get a list of tables that the current user owns and
* have indisclustered set. Return the list in a List * of RelToCluster
- * with the tableOid and the indexOid on which the table is already
- * clustered.
+ * (stored in the specified memory context), each one giving the tableOid
+ * and the indexOid on which the table is already clustered.
*/
static List *
get_tables_to_cluster(MemoryContext cluster_context)
@@ -1539,9 +1539,7 @@ get_tables_to_cluster(MemoryContext cluster_context)
/*
* Get all indexes that have indisclustered set and are owned by
- * appropriate user. System relations or nailed-in relations cannot ever
- * have indisclustered set, because CLUSTER will refuse to set it when
- * called with one of them as argument.
+ * appropriate user.
*/
indRelation = table_open(IndexRelationId, AccessShareLock);
ScanKeyInit(&entry,
