From fd267c1ebc363ae6b1bf586794fa5cc9e8cca43c Mon Sep 17 00:00:00 2001
From: Tom Lane
Date: Sat, 11 Feb 2006 23:31:34 +0000
Subject: Skip ambulkdelete scan if there's nothing to delete and the index is
 not partial.  None of the existing AMs do anything useful except counting
 tuples when there's nothing to delete, and we can get a tuple count from the
 heap as long as it's not a partial index.  (hash actually can skip anyway
 because it maintains a tuple count in the index metapage.) GIST is not
 currently able to exploit this optimization because, due to failure to index
 NULLs, GIST is always effectively partial.  Possibly we should fix that
 sometime. Simon Riggs w/ some review by Tom Lane.

---
 src/backend/commands/vacuum.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/backend/commands/vacuum.c')

diff --git a/src/backend/commands/vacuum.c b/src/backend/commands/vacuum.c
index d60c433095d..3153a0a559a 100644
--- a/src/backend/commands/vacuum.c
+++ b/src/backend/commands/vacuum.c
@@ -13,7 +13,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.323 2006/02/11 17:14:09 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.324 2006/02/11 23:31:33 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2955,6 +2955,7 @@ scan_index(Relation indrel, double num_tuples)
 	/* Do post-VACUUM cleanup, even though we deleted nothing */
 	vcinfo.vacuum_full = true;
 	vcinfo.message_level = elevel;
+	vcinfo.num_heap_tuples = num_tuples;
 
 	stats = index_vacuum_cleanup(indrel, &vcinfo, stats);
 
@@ -3022,6 +3023,7 @@ vacuum_index(VacPageList vacpagelist, Relation indrel,
 	/* Do post-VACUUM cleanup */
 	vcinfo.vacuum_full = true;
 	vcinfo.message_level = elevel;
+	vcinfo.num_heap_tuples = num_tuples + keep_tuples;
 
 	stats = index_vacuum_cleanup(indrel, &vcinfo, stats);
 
-- 
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