code: package it.unibz.inf.ontop.docker.mysql;
  
  import it.unibz.inf.ontop.docker.AbstractVirtualModeTest;
  import it.unibz.inf.ontop.owlapi.OntopOWLEngine;
  import it.unibz.inf.ontop.owlapi.connection.OWLStatement;
  import it.unibz.inf.ontop.owlapi.connection.OntopOWLConnection;
  import it.unibz.inf.ontop.owlapi.connection.OntopOWLStatement;
  import it.unibz.inf.ontop.owlapi.resultset.OWLBindingSet;
  import it.unibz.inf.ontop.owlapi.resultset.TupleOWLResultSet;
  import org.junit.AfterClass;
  import org.junit.BeforeClass;
  import org.junit.Test;
  import org.semanticweb.owlapi.model.OWLException;
  import org.semanticweb.owlapi.model.OWLOntologyCreationException;
  
  import static org.junit.Assert.*;
  
  
  /**
   * When the ID is both used for creating the URI and as the literal of a datatype property.
   */
  public class HasIdTest extends AbstractVirtualModeTest {
  
      private static final String owlFileName = "/mysql/pullOutEq/pullOutEq.ttl";
      private static final String obdaFileName = "/mysql/pullOutEq/pullOutEq.obda";
      private static final String propertyFileName = "/mysql/pullOutEq/pullOutEq.properties";
  
      private static OntopOWLEngine REASONER;
      private static OntopOWLConnection CONNECTION;
  
      @BeforeClass
      public static void before() throws OWLOntologyCreationException {
          REASONER = createReasoner(owlFileName, obdaFileName, propertyFileName);
          CONNECTION = REASONER.getConnection();
      }
  
      @Override
      protected OntopOWLStatement createStatement() throws OWLException {
          return CONNECTION.createStatement();
      }
  
      @AfterClass
      public static void after() throws Exception {
          CONNECTION.close();
          REASONER.close();
      }
  
  
      private TupleOWLResultSet runLocalQuery(String query) throws OWLException {
  
          OWLStatement st = createStatement();
          return st.executeSelectQuery(query);
      }
  
      @Test
      public void test() throws OWLException {
          TupleOWLResultSet  results = runLocalQuery("PREFIX : <http://example.com/vocab#>" +
                  "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>" +
                  "SELECT ?p ?firstName ?lastName " +
                  "WHERE { " +
                  "    ?p :hasId \"3\"^^xsd:int . " +
                  "    OPTIONAL { ?p :firstName ?firstName }" +
                  "    OPTIONAL { ?p :lastName ?lastName }" +
                  "}");
          // At least one result
          assertTrue(results.hasNext());
          final OWLBindingSet bindingSet = results.next();
          assertEquals(bindingSet.getOWLIndividual("p").toString(), "<http://example.com/persons/3>");
          assertNull(bindingSet.getOWLLiteral("firstName"));
          assertNull(bindingSet.getOWLLiteral("lastName"));
          assertFalse(results.hasNext());
      }
  }
  