[postgis-devel] automatic BVOL on spatial columns

strk at refractions.net strk at refractions.net
Mon Jan 10 14:16:46 PST 2005


On Mon, Jan 10, 2005 at 02:05:46PM +0100, Markus Schaber wrote:
> Hi, Strk,
> 
> How is the BBox Cache supposed to survive a dump/reload of the database?
> 
> If we go the way of making the BBox Cache a compile-time decision, we do
> not have a problem.
> 
> But if it is to be done by the user manually, we have to make the cache
> presence bit part of our canonical representation. (We do not have to
> make the bbox itsself part of the canonical rep as we can recalculate it
> at reloading.)

Nooo! Not another extension ;)
If AUTOCACHE_BBOX is on (current default) canonical input will
compute bbox for COMPLEX_GEOMS (!points).
If AUTOCACHE_BBOX is off, the user is responsible to manually
add a cache.
--strk;
> 
> Thanks,
> Markus
> -- 
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