-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all,
I am running the following query prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> prefix modelica: <http://modelica.org#> select distinct ?a ?b ?c where { ?a rdf:type modelica:Port . ?b rdf:type modelica:Port . ?c rdf:type modelica:Port . ?a modelica:connect ?b . ?b modelica:connect ?a . ?b modelica:connect ?c . ?c modelica:connect ?b . filter not exists { ?a modelica:connect ?c . } filter not exists { ?c modelica:connect ?a . } FILTER(?a != ?b && ?a != ?c) FILTER(?b != ?c) } against 500 triples in a in-memory model. I get the expected 200 results but it takes > 60s to do so. I know that this query is not trivial but 60s? The test data basically looks like this (repeated 50 times with distinct names): modelica:a rdf:type modelica:Port modelica:b rdf:type modelica:Port modelica:c rdf:type modelica:Port modelica:d rdf:type modelica:Port modelica:a modelica:connect modelica:b modelica:b modelica:connect modelica:a modelica:b modelica:connect modelica:c modelica:c modelica:connect modelica:b modelica:c modelica:connect modelica:d modelica:d modelica:connect modelica:c Can anyone point out what I am doing wrong here or could do better? - -- Christoph Höger Technische Universität Berlin Fakultät IV - Elektrotechnik und Informatik Übersetzerbau und Programmiersprachen Sekr. TEL12-2, Ernst-Reuter-Platz 7, 10587 Berlin Tel.: +49 (30) 314-24890 E-Mail: [email protected] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/ iEYEARECAAYFAk2+YQgACgkQhMBO4cVSGS/5IACfe7pyhslGxD80x9cHqi4uFPyG UoIAnAvYQzUTOiWmA0s6KJy3izuvQfOl =lXyX -----END PGP SIGNATURE-----
