From 9ca99cda21a7eeb4bd975c811e7bcc6584255e1b Mon Sep 17 00:00:00 2001
From: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: Tue, 19 May 2009 08:30:00 +0000
Subject: [PATCH] Update relpages and reltuples estimates in stand-alone
ANALYZE, even if there's no analyzable attributes or indexes. We also used to
report 0 live and dead tuples for such tables, which messed with autovacuum
threshold calculations.
This fixes bug #4812 reported by George Su. Backpatch back to 8.1.
---
src/backend/commands/analyze.c | 15 +++------------
1 file changed, 3 insertions(+), 12 deletions(-)
diff --git a/src/backend/commands/analyze.c b/src/backend/commands/analyze.c
index 6285a578889..5c5eb0444dd 100644
--- a/src/backend/commands/analyze.c
+++ b/src/backend/commands/analyze.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/commands/analyze.c,v 1.136 2009/05/05 18:02:11 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/commands/analyze.c,v 1.137 2009/05/19 08:30:00 heikki Exp $
*
*-------------------------------------------------------------------------
*/
@@ -363,19 +363,10 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt,
}
/*
- * Quit if no analyzable columns
+ * Quit if no analyzable columns and no pg_class update needed.
*/
- if (attr_cnt <= 0 && !analyzableindex)
- {
- /*
- * We report that the table is empty; this is just so that the
- * autovacuum code doesn't go nuts trying to get stats about a
- * zero-column table.
- */
- if (update_reltuples)
- pgstat_report_analyze(onerel, 0, 0);
+ if (attr_cnt <= 0 && !analyzableindex && !update_reltuples)
goto cleanup;
- }
/*
* Determine how many rows we need to sample, using the worst case from
--
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