On Fri, Jun 23, 2006 at 12:21:49PM +0800, Syan Tan wrote: > hashing also begs the question of what do you hash? Which is IMO one of the two important reasons a hash won't work well. The other one is performance.
> for different data types, and different for different versions, Well, the hash would have to be over a concatenation of all columns casted to text. > client hashed on a ,b , y and his hashed on a , b, x because it 's a new > version made at a different time, in a different place etc... Well, because of that the hash generation would have to take place in the backend by means of a trigger updating a hash column which would then be matched against just like XMIN. > sequence numbers are pretty simple in comparison. Yes, such as XMIN. Karsten -- GPG key ID E4071346 @ wwwkeys.pgp.net E167 67FD A291 2BEA 73BD 4537 78B9 A9F9 E407 1346 _______________________________________________ Gnumed-devel mailing list [email protected] http://lists.gnu.org/mailman/listinfo/gnumed-devel
