@Test
public void testCost3() throws Exception {
String q1 =
"" //
+ "SELECT ?f ?m ?d ?e ?l ?c " //
+ "{" //
+ " Filter(?f > \"5\")." //
+ " Filter(?e > \"6\")." //
+ " ?f a ?m ." //
+ " ?e a ?l ." //
+ " ?d <uri:talksTo> ?f . " //
+ " ?c <uri:talksTo> ?e . " //
+ " ?m <http://www.w3.org/2000/01/rdf-schema#label> ?d ." //
+ " ?l <http://www.w3.org/2000/01/rdf-schema#label> ?c ." //
+ "}"; //
String q2 =
"" //
+ "SELECT ?s ?t ?u " //
+ "{" //
+ " ?s a ?t ." //
+ " ?t <http://www.w3.org/2000/01/rdf-schema#label> ?u ." //
+ " ?u <uri:talksTo> ?s . " //
+ "}"; //
SPARQLParser parser = new SPARQLParser();
ParsedQuery pq1 = parser.parseQuery(q1, null);
ParsedQuery pq2 = parser.parseQuery(q2, null);
SimpleExternalTupleSet sep = new SimpleExternalTupleSet((Projection) pq2.getTupleExpr());
List<ExternalTupleSet> eList = Lists.newArrayList();
eList.add(sep);
final TupleExpr te = pq1.getTupleExpr().clone();
final PCJOptimizer pcj = new PCJOptimizer(eList, false);
pcj.optimize(te, null, null);
ThreshholdPlanSelector tps = new ThreshholdPlanSelector(pq1.getTupleExpr());
double cost = tps.getCost(te, .4, .3, .3);
Assert.assertEquals(.575, cost, .0001);
}
@Test
public void testCost2() throws Exception {
String q1 =
"" //
+ "SELECT ?f ?m ?d ?e ?l ?c " //
+ "{" //
+ " ?f a ?m ." //
+ " ?e a ?l ." //
+ " ?d <uri:talksTo> ?f . " //
+ " ?c <uri:talksTo> ?e . " //
+ " ?m <http://www.w3.org/2000/01/rdf-schema#label> ?d ." //
+ " ?l <http://www.w3.org/2000/01/rdf-schema#label> ?c ." //
+ "}"; //
SPARQLParser parser = new SPARQLParser();
ParsedQuery pq1 = parser.parseQuery(q1, null);
ThreshholdPlanSelector tps = new ThreshholdPlanSelector(pq1.getTupleExpr());
double cost = tps.getCost(pq1.getTupleExpr(), .4, .3, .3);
Assert.assertEquals(.58, cost, .000000001);
}
@Test
public void testCost1() throws Exception {
String q1 =
"" //
+ "SELECT ?f ?m ?d ?h ?i " //
+ "{" //
+ " ?f a ?m ." //
+ " ?m <http://www.w3.org/2000/01/rdf-schema#label> ?d ." //
+ " ?d <uri:talksTo> ?f . " //
+ " ?d <uri:hangOutWith> ?f ." //
+ " ?f <uri:hangOutWith> ?h ." //
+ " ?f <uri:associatesWith> ?i ." //
+ " ?i <uri:associatesWith> ?h ." //
+ "}"; //
SPARQLParser parser = new SPARQLParser();
ParsedQuery pq1 = parser.parseQuery(q1, null);
ThreshholdPlanSelector tps = new ThreshholdPlanSelector(pq1.getTupleExpr());
double cost = tps.getCost(pq1.getTupleExpr(), .6, .4, 0);
Assert.assertEquals(.7, cost, .01);
}