Re: Temporary Views

Tom Lane wrote:
> Hannu Krosing <hannu(at)tm(dot)ee> writes:
> > It seems to be a broken view not security risk in 7.2.1
>
> The implementation of temp tables has changed completely in CVS tip,
> so experiments with 7.2 aren't very relevant. In CVS tip I believe
> you *could* read the contents of someone else's temp table, assuming
> you had permissions to read the view. However, you'd not be guaranteed
> to get up-to-date information, since the guy who actually owns the temp
> table would be using his local-buffer manager for access to it; there
> might be many pages that you'd see stale information from because the
> only up-to-date copy is in local memory of the owning backend.
>
> I see some potential for confusion here, but not really any
> crash-the-database scenarios. I also do not see a security risk:
> you did grant the other guy read permission on your view, after all.

Does every other user see the view name on his temp table? Can two
people create a view on a temp table at the same time? It seems not:

test=> create temp table x1(x int);
CREATE TABLE
test=> create view x2 as select * from x1;
ERROR: Relation 'x2' already exist

Seems this should work.

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