Re: Remove xmin and cmin from frozen tuples

Alvaro,

> One thing that comes to mind is that this makes somewhat easier to build
> a tool to write pre-built tables, for bulk-loading purposes. You just
> construct the binary file with the HEAP_FROZEN bit set, and then attach
> the file to a dummy table. (Then again, you can do it today, using a
> Xmin of FrozenTransactionId. I wonder why the Bizgres people isn't
> advocating a tool to do that. It is very hard to do with user-defined
> types, but for BI/DW you mostly don't need those, do you?)

Hmmm ... can you expand on this a little? We'd discussed "frozen partitions"
but hadn't thought to get around to them for a while, expecting the kind of
issues which Tom just raised.

--
Josh Berkus
Aglio Database Solutions
San Francisco