I did some work on query planning for federated queries when I worked for DERI. (http://deri.ie). However, that work may have been a bit more complex than you are considering as we had some sources for vocabulary equivalence and were attempting to handle that at the same time.
When you say a query planner for federated queries, are you looking to optimise queries that contain federated queries, or attempting to build a federated query from a non-federated one? Claude On Wed, Aug 28, 2013 at 1:54 PM, Diogo FC Patrao <[email protected]>wrote: > Hello > > I was thinking about writing a query planner for federated queries. AFAIK, > there's no such thing on ARQ, and couldn't find any third-party libs for > that. > > So my questions are: > > 1) do you know of any open source projects out there that deals with it? > I'm willing to contribute. > > 2) If there is no such project, is a Transformer the right place to go for > it? I thought about extending TransformerCopy to reorder OpJoins to solve > first those with smaller costs. > > Thanks! > > > -- > diogo patrão > -- I like: Like Like - The likeliest place on the web<http://like-like.xenei.com> Identity: https://www.identify.nu/[email protected] LinkedIn: http://www.linkedin.com/in/claudewarren
