Horton

Re: Writeable CTE patch

Alvaro Herrera <alvherre@commandprompt.com>

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From: Alvaro Herrera <alvherre@commandprompt.com>
To: Marko Tiikkaja <marko.tiikkaja@cs.helsinki.fi>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Alex Hunsaker <badalex@gmail.com>, pgsql-hackers@postgresql.org
Date: 2009-12-07T22:06:35Z
Lists: pgsql-hackers 
Marko Tiikkaja escribió:
> Tom Lane wrote:
> >The only thing that I'd be comfortable with is
> >copying the snap and modifying the copy.
> 
> I don't see an easy way to do that with the current code;
> CopySnapshot() is static and PushUpdatedSnapshot() seems to be a bit
> of a pain since it messes up some of the existing code which uses
> the active snapshot stack.  Any ideas?

That API is rather new.  Maybe we need a new entry point, say
GetActiveSnapshotCopy or some such.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support