From e02d1abee6ada0658ddcbc73dc45925e6054781c Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Sat, 2 Nov 2002 21:20:40 +0000
Subject: [PATCH] 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.
---
src/backend/commands/cluster.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/src/backend/commands/cluster.c b/src/backend/commands/cluster.c
index 55cee5b4a76..fa414320a31 100644
--- 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);
--
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