Re: Virtual tx id

On Wed, 21 Sep 2022 at 11:58, James Sewell <james.sewell@gmail.com> wrote:
> Hello Hackers!
>
> Is it possible to get the current virtual txid from C somehow?
>
The virtual txid is consisted of MyProc->backendId and MyProc->lxid.  Do you
mean a C function that returns virtual txid?

> I've looked through the code, but can't seem to find anything other than
> getting a NULL when there is no (real) xid assigned. Maybe I'm missing
> something?
>
Do you mean use SQL function to check the virtual?  IIRC, there is no such
functions.  Maybe you can use pg_export_snapshot() to get virtual txid (v10
and later), the filename of exported snapshot consists MyProc->backendId
and MyProc->lxid.


-- 
Regrads,
Japin Li.
ChengDu WenWu Information Technology Co.,Ltd.