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  1. Blazegraph (by SYSTAP)
  2. BLZG-2089

Bad performance with path queries in 2.1.4

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      Description

      The following query times out in 2.1.4, used to work before:

      SELECT ?item ?taxonName ?taxonRank ?parentName ?parentRank ?higherParent WHERE {
        ?item wdt:P225 "Rivasmartinezia" .
        ?item wdt:P105 wd:Q34740 .
        ?item wdt:P171/wdt:P225 ?parentName .
        ?item wdt:P171/wdt:P105 ?parentRank .
        ?item wdt:P171+ wd:Q756 .
      }
      

      Removing the last line (P171+) makes it execute in 143 ms and return one ?item which is wd:Q26902704. Also, query:

      ASK {
        wd:Q26902704 wdt:P171+ wd:Q756 .
      }
      

      Returns true in 276 ms. Something seems to break in between those two though as together they time out.

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            Assignee:
            michaelschmidt michaelschmidt
            Reporter:
            stasmalyshev stasmalyshev
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              Updated:
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