On Fri, Jul 21, 2023 at 2:26 PM Michael Paquier <mich...@paquier.xyz> wrote: > > On Fri, Jul 21, 2023 at 02:05:56PM +0800, Junwang Zhao wrote: > > I noticed there are some places calling table_open with > > RowExclusiveLock but table_close with NoLock, like in function > > toast_save_datum. > > > > Can anybody explain the underlying logic, thanks in advance. > > This rings a bell. This is a wanted behavior, see commit f99870d and > its related thread: > https://postgr.es/m/17268-d2fb426e0895a...@postgresql.org >
I see this patch, so all the locks held by a transaction will be released at the commit phase, right? Can you show me where the logic is located? > The tests added by this commit in src/test/isolation/ will show the > difference in terms of the way the toast values get handled with and > without the change. > -- > Michael -- Regards Junwang Zhao
