[JENA-1317] Property path with wildcard hack fails to consider incoming path

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 3.2.0
• Fix Version/s: Jena 3.3.0
• Component/s: ARQ
• Assignee: Andy Seaborne
• Reporter: Lorenz Bühmann
• Created: 10/Apr/17 09:57
• Updated: 10/May/17 15:35
• Resolved: 10/Apr/17 17:37

Description

It looks like the evaluation of a property path with an alternative of a non-existing property and it's negation fails:

Data (data.ttl):

@prefix :    <http://example.com/> .
:a :p :b .

Query (query.txt):

PREFIX : <http://example.com/>
SELECT ?u {
:b ^(:p1|!:p1) ?u .
}

Algebra:

(project (?u)
    (path ?u (alt <http://example.com/p1> (notoneof <http://example.com/p1>)) <http://example.com/b>))

Called with
sparql --data data.ttl --query query.txt --explain

Originally reported here: (http://stackoverflow.com/questions/43317635/sparql-path-between-two-nodes/43319876#43319876)