On Thu, 4 Sep 2003, Shridhar Daithankar wrote:
> > column? I think MAX() does not know or cares if a column is indexed, but...
>
> No. Postgresql uses MVCC which mean there could be multiple views of sample
> tuple active at the same time. There is no way to tell which is max. value for
> a col
On Fri, 5 Sep 2003, Bruce Momjian wrote:
> > When I was curious as to how COUNT might be maintained, I was pretty
> > sure that this wouldn't be the preferred method...
>
> See my later idea of the trigger doing +/-1 rather than locking the
> value during the transaction.
>
> If we don't do it t
On Tue, 16 Sep 2003, Tom Lane wrote:
> This is not a 100% solution to our problems. I don't think we could use
> it to solve the problem for int2 columns ("int2col = 42") because it'd
> be unsafe to promise that an int4-to-int2 cast could be inserted into
> an expression without changing the beha
On Wed, 17 Sep 2003, Tom Lane wrote:
> Another thing to keep in mind is that it's not always the case that
> assigning the right type to a literal constant would solve the problem.
> We have the same issues with variables; for example, a join with
> "WHERE a.int8col = b.int4col" may fail to take a
