Re: Improve compression speeds in pg_lzcompress.c

On 1/7/2013 2:05 AM, Andres Freund wrote:
> I think there should be enough bits available in the toast pointer to
> indicate the type of compression. I seem to remember somebody even
> posting a patch to that effect?
> I agree that it's probably too late in the 9.3 cycle to start with this.

so an upgraded database would have old toasted values in the old 
compression format, and new toasted values in the new format in an 
existing table?      that's kind of ugly.