On 29/03/12 19:59, Robert Vesse wrote:
At what stage in the query execution does Jena translate property paths into
simple BGPs (where applicable)?
>
I'd like to look at this code (if it exists) as it may prove useful for
something we're looking at doing
Cheers
Rob
It's done as part of the high-level optimization stage.
Class TransformPathFlattern
and is invoked in
Optimize.rewrite(...)
Query engines get to choose which optimizations make sense to them --
working from the bottom to the top:
QueryEngineBase.modifyOp is abstract.
QueryEngineMain.modifyOp invokes Algebra.optimize calls Optimize.rewrite
QueryEngineBase.createPlan calls modifyOP
Andy
