Transitive paths that begin or terminate in a fixed value return wrong results

[floriankramer]

Given the following query:

SELECT ?a WHERE {
  <Albert_Einstein> <is-a>*/<instance-of> ?a .
}

The current implementation leads to an IndexScan that returns all <is-a> triples with <Albert_Einstein> as a subject, which are then used by the TransitivePath operation. What should happen is, that the full <is-a> relation is loaded and the TransitivePath only returns paths that start from <Albert_Einstein>

[floriankramer]

After reading through the code again this case is already handled during the optimization of the transitive path GraphPattern.