Added a dummy triple into the FILTER of the count query to ensure tha…

…t Tentris executes it correctly.
dice-group · Sep 20, 2024 · a52a17e · a52a17e
1 parent c065a58
commit a52a17e
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/main/java/org/dice_research/cel/refine/suggest/SparqlBasedSuggestor.java b/src/main/java/org/dice_research/cel/refine/suggest/SparqlBasedSuggestor.java
@@ -493,7 +493,10 @@ protected String createNotExistsFilter(ClassExpression context, String instanceV
                 for (ClassExpression expression : expressions) {
                     SparqlBuildingVisitor visitor = new SparqlBuildingVisitor(filterBuilder, "?pos", null, null, null);
                     visitor.setIntermediateVariableName("?y");
-                    filterBuilder.append("FILTER NOT EXISTS { ");
+                    filterBuilder.append("FILTER NOT EXISTS { \n        ");
+                    // We have to add a dummy triple
+                    filterBuilder.append(instanceVariable);
+                    filterBuilder.append(" a <http://www.w3.org/2002/07/owl#NamedIndividual> . \n");
                     expression.accept(visitor);
                     filterBuilder.append(" }\n");
                 }