During swap_relfilenodes, swap relation size statistic fields along with

the relfilenode and toast fields.  This ensures that the newly-computed
statistics will be available on completion of CLUSTER.

diff --git a/src/backend/commands/cluster.c b/src/backend/commands/cluster.c
index 55cee5b..fa41432 100644 (file)
--- a/src/backend/commands/cluster.c
+++ b/src/backend/commands/cluster.c
@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *       $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.90 2002/09/04 20:31:14 momjian Exp $
+ *       $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.91 2002/11/02 21:20:40 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -475,6 +475,20 @@ swap_relfilenodes(Oid r1, Oid r2)
 
        /* we should not swap reltoastidxid */
 
+       /* swap size statistics too, since new rel has freshly-updated stats */
+       {
+               int4    swap_pages;
+               float4  swap_tuples;
+
+               swap_pages = relform1->relpages;
+               relform1->relpages = relform2->relpages;
+               relform2->relpages = swap_pages;
+
+               swap_tuples = relform1->reltuples;
+               relform1->reltuples = relform2->reltuples;
+               relform2->reltuples = swap_tuples;
+       }
+
        /* Update the tuples in pg_class */
        simple_heap_update(relRelation, &reltup1->t_self, reltup1);
        simple_heap_update(relRelation, &reltup2->t_self, reltup2);