> -----Original Message-----
> From: owner-pgsql-hackers@postgreSQL.org
> [mailto:owner-pgsql-hackers@postgreSQL.org]On Behalf Of Tom Lane
>
> TODO item comments:
>
> * Pull requested data directly from indexes, bypassing heap data
>
> I doubt this is ever going to happen --- to make it possible, we'd
> have to store tuple-commit status in index entries as well as in the
> tuples themselves. That would be a substantial space and speed penalty;
> is the potential gain really worth it?
>
I agree with Tom. We could omit rows using indexes but cound't
pull data from indexes without time qualification of heap tuples now.
> * -elog() flushes cache, try invalidating just entries from current xact,
> perhaps using invalidation cache
>
> I don't think this is done?
>
If I recognize correctly this item,this was fixed by my recent changes
for cache invalidation though I had changed it without knowing this item.
Regards.
Hiroshi Inoue
Inoue@tpf.co.jp