> -----Original Message-----
> From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
>
> "Hiroshi Inoue" <Inoue@tpf.co.jp> writes:
> > Isn't it a better idea to have a separate 'SELF EXCLUSIVE' lock
> > which conflicts with only itself ?
>
> *Only* itself? What would that be useful for?
Isn't VacuumLock = RowExclusiveLock + SelfExclusiveLock
for the table ?
regards,
Hiroshi Inoue