Tom Lane wrote:
> "dx k9" <bitsandbytes88@xxxxxxxxxxx> writes:
> > [ stuck reindex ]
> > It turns out it was a temporary database and temporary table, that just
> > wasn't there maybe it thought it was there from some type of snapshot then
> > the next minute it was gone.
>
> Hmm, there is not any filter in ReindexDatabase() to exclude temp tables
> of other backends, but it sure seems like there needs to be. CLUSTER
> might have the same issue. I think we fixed this in VACUUM long ago,
> but we need to check the other commands that grovel over all of a database.
Was this ever fixed? I think it wasn't, because I don't see any check
in ReindexDatabase. Here is a patch to add one.
I examined cluster.c and it does seem to be missing a check too. I'm
not sure where to add one though; the best choice would be the place
where the list of rels is built, but that scans only pg_index, so it
doesn't have access to the namespace of each rel. So one idea would be
to get the pg_class row for each candidate, but that seems slow.
Another idea would be to just add all the candidates and silently skip
the temp indexes in cluster_rel.
--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.
Index: src/backend/commands/indexcmds.c
===================================================================
RCS file: /home/alvherre/Code/cvs/pgsql/src/backend/commands/indexcmds.c,v
retrieving revision 1.162
diff -c -p -r1.162 indexcmds.c
*** src/backend/commands/indexcmds.c 25 Aug 2007 19:08:19 -0000 1.162
--- src/backend/commands/indexcmds.c 25 Aug 2007 22:11:18 -0000
*************** ReindexDatabase(const char *databaseName
*** 1292,1297 ****
--- 1292,1301 ----
if (classtuple->relkind != RELKIND_RELATION)
continue;
+ /* Skip temp tables of other backends; we can't reindex them at all */
+ if (isOtherTempNamespace(classtuple->relnamespace))
+ continue;
+
/* Check user/system classification, and optionally skip */
if (IsSystemClass(classtuple))
{
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