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
