On Wed, 2005-05-11 at 12:53 +0800, Christopher Kings-Lynne wrote: > > Another trick you can use with large data sets like this when you want > > results > > back in seconds is to have regularly updated tables that aggregate the data > > along each column normally aggregated against the main data set. > > > Maybe some bright person will prove me wrong by posting some working > > information about how to get these apparently absent features working. > > Most people just use simple triggers to maintain aggregate summary tables...
Agreed. I've also got a view which calls a function that will 1) use the summary table where data exists, or 2) calculate the summary information, load it into summary table, and send a copy to the client (partial query results cache). It's not all nicely abstracted behind user friendly syntax, but most of those features can be cobbled together (with effort) in PostgreSQL. -- ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
