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Disallow VACUUM, ANALYZE, TRUNCATE on temp tables belonging to other

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backends.  Given that temp tables now store data locally in the local
buffer manager, these things are not going to work safely.
This commit is contained in:
Tom Lane
2002-09-23 20:43:41 +00:00
parent c99f820053
commit 5fa3418304
5 changed files with 64 additions and 5 deletions
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16
src/backend/commands/analyze.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/analyze.c,v 1.46 2002/09/04 20:31:14 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/analyze.c,v 1.47 2002/09/23 20:43:40 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -21,6 +21,7 @@
#include "catalog/catalog.h"
#include "catalog/catname.h"
#include "catalog/indexing.h"
#include "catalog/namespace.h"
#include "catalog/pg_operator.h"
#include "catalog/pg_statistic.h"
#include "catalog/pg_type.h"
@ -215,6 +216,19 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt)
return;
}
/*
* Silently ignore tables that are temp tables of other backends ---
* trying to analyze these is rather pointless, since their
* contents are probably not up-to-date on disk. (We don't throw a
* warning here; it would just lead to chatter during a database-wide
* ANALYZE.)
*/
if (isOtherTempNamespace(RelationGetNamespace(onerel)))
{
relation_close(onerel, AccessShareLock);
return;
}
/*
* We can ANALYZE any table except pg_statistic. See update_attstats
*/