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  1. Apache Jena
  2. JENA-2064

path* with substituted subject may give wrong answers

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Details

    • Bug
    • Status: Open
    • Major
    • Resolution: Unresolved
    • Jena 3.17.0
    • None
    • ARQ
    • None

    Description

      Example:

      PREFIX : <http://example/>
      SELECT * { BIND(:xxx AS ?s) ?s :ppp* ?o }
      

      on an empty graph (:xxx is not in the data).

      ~ >> sparql 'PREFIX : <http://example/> SELECT * { BIND(:xxx AS ?s) ?s :ppp* ?o }'
      ---------------
      | s    | o    |
      ===============
      | :xxx | :xxx |
      ---------------
      

      but

      ~ >> sparql --engine=ref 'PREFIX : <http://example/> SELECT * { BIND(:xxx AS ?s) ?s :ppp* ?o }'
      ---------
      | s | o |
      =========
      ---------
      

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              andy Andy Seaborne
              andy Andy Seaborne
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              Dates

                Created:
                Updated: