/**
* Tests whether an algebra expression gives the same results when run both with and without a
* given optimizer
*
* @param algStr Algebra
* @param ds Dataset
* @param opt Optimizer
* @param expected Expected number of results
*/
public static void testAsAlgebra(String algStr, Dataset ds, Symbol opt, int expected) {
Op op = SSE.parseOp(algStr);
List<String> vars = new ArrayList<>();
for (Var v : OpVars.visibleVars(op)) {
vars.add(v.getName());
}
// Track current state
boolean isEnabled = ARQ.isTrue(opt);
boolean isDisabled = ARQ.isFalse(opt);
try {
// Run first without optimization
ARQ.set(opt, false);
QueryEngineMain engine =
new QueryEngineMain(op, ds.asDatasetGraph(), BindingFactory.binding(), ARQ.getContext());
QueryIterator iter =
engine.eval(op, ds.asDatasetGraph(), BindingFactory.binding(), ARQ.getContext());
ResultSetRewindable rs =
ResultSetFactory.makeRewindable(
new ResultSetStream(vars, ModelFactory.createDefaultModel(), iter));
if (expected != rs.size()) {
System.err.println("Non-optimized results not as expected");
TextOutput output = new TextOutput((SerializationContext) null);
output.format(System.out, rs);
rs.reset();
}
Assert.assertEquals(expected, rs.size());
iter.close();
// Run with optimization
ARQ.set(opt, true);
engine =
new QueryEngineMain(op, ds.asDatasetGraph(), BindingFactory.binding(), ARQ.getContext());
QueryIterator iterOpt =
engine.eval(op, ds.asDatasetGraph(), BindingFactory.binding(), ARQ.getContext());
ResultSetRewindable rsOpt =
ResultSetFactory.makeRewindable(
new ResultSetStream(vars, ModelFactory.createDefaultModel(), iterOpt));
if (expected != rsOpt.size()) {
System.err.println("Optimized results not as expected");
TextOutput output = new TextOutput((SerializationContext) null);
output.format(System.out, rsOpt);
rsOpt.reset();
}
Assert.assertEquals(expected, rsOpt.size());
iterOpt.close();
Assert.assertTrue(ResultSetCompare.isomorphic(rs, rsOpt));
} finally {
// Restore previous state
if (isEnabled) {
ARQ.set(opt, true);
} else if (isDisabled) {
ARQ.set(opt, false);
} else {
ARQ.unset(opt);
}
}
}
void printFailedResultSetTest(
Query query,
QueryExecution qe,
ResultSetRewindable qrExpected,
ResultSetRewindable qrActual) {
PrintStream out = System.out;
out.println();
out.println("=======================================");
out.println("Failure: " + description());
out.println("Query: \n" + query);
// if ( qe != null && qe.getDataset() != null )
// {
// out.println("Data: \n"+qe.getDataset().asDatasetGraph()) ;
// }
out.println("Got: " + qrActual.size() + " --------------------------------");
qrActual.reset();
ResultSetFormatter.out(out, qrActual, query.getPrefixMapping());
qrActual.reset();
out.flush();
out.println("Expected: " + qrExpected.size() + " -----------------------------");
qrExpected.reset();
ResultSetFormatter.out(out, qrExpected, query.getPrefixMapping());
qrExpected.reset();
out.println();
out.flush();
}
/**
* Tests whether a query gives the same results when run both with and without a given optimizer
*
* @param queryStr Query
* @param ds Dataset
* @param opt Optimizer
* @param expected Expected number of results
*/
public static void test(String queryStr, Dataset ds, Symbol opt, int expected) {
Query q = QueryFactory.create(queryStr);
if (!q.isSelectType()) Assert.fail("Only SELECT queries are testable with this method");
Op op = Algebra.compile(q);
// Track current state
boolean isEnabled = ARQ.isTrue(opt);
boolean isDisabled = ARQ.isFalse(opt);
try {
// Run first without optimization
ARQ.set(opt, false);
ResultSetRewindable rs;
try (QueryExecution qe = QueryExecutionFactory.create(q, ds)) {
rs = ResultSetFactory.makeRewindable(qe.execSelect());
if (expected != rs.size()) {
System.err.println("Non-optimized results not as expected");
TextOutput output = new TextOutput((SerializationContext) null);
output.format(System.out, rs);
rs.reset();
}
Assert.assertEquals(expected, rs.size());
}
// Run with optimization
ARQ.set(opt, true);
ResultSetRewindable rsOpt;
try (QueryExecution qeOpt = QueryExecutionFactory.create(q, ds)) {
rsOpt = ResultSetFactory.makeRewindable(qeOpt.execSelect());
if (expected != rsOpt.size()) {
System.err.println("Optimized results not as expected");
TextOutput output = new TextOutput((SerializationContext) null);
output.format(System.out, rsOpt);
rsOpt.reset();
}
Assert.assertEquals(expected, rsOpt.size());
}
Assert.assertTrue(ResultSetCompare.isomorphic(rs, rsOpt));
} finally {
// Restore previous state
if (isEnabled) {
ARQ.set(opt, true);
} else if (isDisabled) {
ARQ.set(opt, false);
} else {
ARQ.unset(opt);
}
}
}
@Test
public void testUnionWorks() {
Dataset ds = (Dataset) AssemblerUtils.build("union.ttl", SDBConnect.TYPE);
ReconnectingDatasetGraph toQuery = (ReconnectingDatasetGraph) ds.asDatasetGraph();
toQuery.getDatasetGraph().getStore().getTableFormatter().format();
UpdateRequest ur =
UpdateFactory.create(
"insert data {"
+ "graph <http://example.com/a> { <http://example.com/1> <http://example.com/prop> 1 }"
+ "graph <http://example.com/b> { <http://example.com/2> <http://example.com/prop> 2 }"
+ "}");
UpdateProcessor u = UpdateExecutionFactory.create(ur, toQuery);
u.execute();
QueryExecution qe = QueryExecutionFactory.create("SELECT * { ?s ?p ?o }", ds);
ResultSetRewindable r = ResultSetFactory.makeRewindable(qe.execSelect());
assertEquals("We have a union!", 2, r.size());
}
