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Update relpages and reltuples estimates in stand-alone ANALYZE, even if

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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.
This commit is contained in:
Heikki Linnakangas 2009-05-19 08:30:00 +00:00
parent 7280fab717
commit 9ca99cda21
1 changed files with 3 additions and 12 deletions
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15
src/backend/commands/analyze.c
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@ -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