Re: Unlogged tables cannot be truncated twice

Excerpts from Andres Freund's message of lun may 30 20:47:49 -0400 2011:
> On Tuesday, May 31, 2011 02:35:58 AM Andres Freund wrote:
> > On Tuesday, May 31, 2011 02:14:00 AM Andres Freund wrote:
> > > On Tuesday, May 31, 2011 01:56:05 AM Cédric Villemain wrote:
> > > > I remove my own explanations as we conclude on the same thing.
> > > > Attached is the fix by adding a (!reindex) in the index.c if().
> > >
> > > Thats imo wrong because it will break a plain REINDEX?
> >
> > > I think one possible correct fix would be the attached:
> > My version was wrong as well because it did not observe RelationTruncate's
> > nblocks argument. That function is used to "shorten" the relation in
> > vacuum. So dropping the init fork there is not a good idea.
> >
> > So I think it is the simpler version of simply checking the existance of
> > the fork before creating is ok.

Hmm, I wonder if what we should be doing here is observe isreindex in
index_build to avoid creating the init fork. Doing smgr access at that
level seems wrong.

> Gna. gnargl. Coffe. Bed. ;)
>
> There was an accidental hunk I added while removing some whitespace. That
> would not have been good on a real commit.
>
> Argh.

Hah :-)

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