[postgis-devel] RE: [BUGS] BUG #4567: Clustering on GIST INDEX clobbers records in table intermittently

Obe, Regina robe.dnd at cityofboston.gov
Sun Dec 7 23:51:09 PST 2008

"Regina Obe" <robe.dnd at cityofboston.gov> writes:
> Description:        Clustering on GIST INDEX clobbers records in table
> intermittently

> This doesn't always happen to me but does intermittently, and for others it
> happens all the time.

> I wonder whether this is fixed by this recent patch:
> http://archives.postgresql.org/pgsql-committers/2008-12/msg00053.php

> The pre-patch behavior would've depended on the value of a
> never-initialized struct field, so the erratic behavior is explained
> by varying contents of memory.  I'm unable to make it happen in an
> assert-enabled build, but that's probably because the initial contents
> of a palloc'd chunk are never zeroes in such a build.

>			regards, tom lane


Thanks for the quick response on this.  

You think by chance you can test out the patch since you can make this bug happen consistently on your build.


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