On Sun, 2008-01-20 at 12:37 +0000, Heikki Linnakangas wrote: > Simon Riggs wrote: > > On Sat, 2008-01-12 at 18:46 +0000, Gregory Stark wrote: > > > >> To do something like that the user would have to create a prepared > >> transaction > >> to save the snapshot. I think that makes sense though since effectively > >> it's > >> just requiring that the user explicitly do what would otherwise be a hidden > >> implicit requirement -- that the user do something to hold globalxmin back > >> to > >> avoid having the snapshots expire. > > > > This is a good idea which I will want to develop in the future, not yet > > though. > > I haven't been following this thread in detail, but I'd just like to > point out that there's a couple features in the XA spec that we don't > currently support: > > - ability to "stop" a transaction, and resume it later, executing other > transactions in between. > - ability to stop a transaction, and resume it later in another connection. > > Neither of these are essential for two-phase commit, which is what the > spec is for, but if they happened to fall out of some other work, it > would be nice...
Thanks for the info. Sounds like this idea would provide some of the groundwork for the latter concept. -- Simon Riggs 2ndQuadrant http://www.2ndQuadrant.com ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
