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Make CLUSTER and REINDEX silently skip remote temp tables in their

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database-wide editions.

Per report from bitsandbytes88 <at> hotmail.com and subsequent discussion.
This commit is contained in:
Alvaro Herrera
2007-09-10 21:59:37 +00:00
parent 6a10f0f749
commit b366562e43
2 changed files with 30 additions and 2 deletions
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26
src/backend/commands/cluster.c
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@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/cluster.c,v 1.162 2007/05/19 01:02:34 alvherre Exp $
* $PostgreSQL: pgsql/src/backend/commands/cluster.c,v 1.163 2007/09/10 21:59:37 alvherre Exp $
*
*-------------------------------------------------------------------------
*/
@ -106,6 +106,15 @@ cluster(ClusterStmt *stmt, bool isTopLevel)
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_CLASS,
RelationGetRelationName(rel));
/*
* Reject clustering a remote temp table ... their local buffer manager
* is not going to cope.
*/
if (isOtherTempNamespace(RelationGetNamespace(rel)))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot cluster temporary tables of other sessions")));
if (stmt->indexname == NULL)
{
ListCell *index;
@ -275,6 +284,21 @@ cluster_rel(RelToCluster *rvtc, bool recheck)
return;
}
/*
* Silently skip a temp table for a remote session. Only doing this
* check in the "recheck" case is appropriate (which currently means
* somebody is executing a database-wide CLUSTER), because there is
* another check in cluster() which will stop any attempt to cluster
* remote temp tables by name. There is another check in
* check_index_is_clusterable which is redundant, but we leave it for
* extra safety.
*/
if (isOtherTempNamespace(RelationGetNamespace(OldHeap)))
{
relation_close(OldHeap, AccessExclusiveLock);
return;
}
/*
* Check that the index still exists
*/