Re: [HACKERS] Comment in snapbuild.c file - Mailing list pgsql-hackers

From Alvaro Herrera
Subject Re: [HACKERS] Comment in snapbuild.c file
Date
Msg-id 20170813032841.i4mcgbqlok62x5md@alvherre.pgsql
Whole thread Raw
In response to Re: [HACKERS] Comment in snapbuild.c file  (Alvaro Herrera <alvherre@2ndquadrant.com>)
Responses Re: [HACKERS] Comment in snapbuild.c file  (Masahiko Sawada <sawada.mshk@gmail.com>)
List pgsql-hackers
Alvaro Herrera wrote:
> Masahiko Sawada wrote:
> > Hi all,
> > 
> > In snapbuild.c file, there is a comment as follows.
> > 
> >    * NB: Because of that xmax can be lower than xmin, because we only
> >    * increase xmax when a catalog modifying transaction commits. While odd
> >    * looking, it's correct and actually more efficient this way since we hit
> >    * fast paths in tqual.c.
> >    */
> 
> I think the whole para needs to be rethought.

Pushed, thanks.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services



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