Thank You, the tableindex package in 0.19 ? On Thu, Dec 18, 2008 at 7:21 PM, Clint Morgan <[email protected]>wrote:
> You could maintain an index, and then use the index to jump right to rows > for the column value(s) in question. See the tableindexed package for more > info.. > > cheers, > -clint > > On Thu, Dec 18, 2008 at 4:37 AM, Slava Gorelik <[email protected] > >wrote: > > > Hi.I'm trying to implement Unique constraint on some column, but it looks > > like there no other solution than to scan all data. > > This solution is problematic from the performance perspective. Is it > > possible to implement this in the better way ? > > > > Best Regards. > > >
