On Thu, May 14, 2020 at 4:05 PM Michael Paquier <michael@paquier.xyz> wrote:
On Thu, May 14, 2020 at 03:38:24PM +0800, Andy Fan wrote: > I want to know what happens been done for an uncommitted prepared > transaction with pg_waldump, however I can't find it. > > demo=*# prepare transaction 's'; > PREPARE TRANSACTION > demo=# insert into mm select generate_series(1, 1000); > INSERT 0 1000 > > I can get the log for "prepared command" only, but nothing was found for > the insert statement. what should I do?
Because in your previous sequence you inserted the data after preparing the transaction and they are part of a completely different transaction, no?
Thanks, actually I don't know how to use prepared transaction and how it works.
I care about this because there is a long prepared transaction exists in our customer,
and we want to know what this transaction has done（like any data it changed).
All the things I know is the data comes from pg_prepared_xact, but it doesn't help a lot.