@Test
  public void testBestIndexPick() throws Exception {
    QueryService qs;

    qs = CacheUtils.getQueryService();
    qs.createIndex("statusIndex", IndexType.FUNCTIONAL, "status",
        SEPARATOR + "portfolios, positions");
    QCompiler compiler = new QCompiler();
    List list = compiler.compileFromClause(SEPARATOR + "portfolios pf");
    ExecutionContext context = new QueryExecutionContext(null, CacheUtils.getCache());
    context.newScope(context.associateScopeID());

    for (final Object o : list) {
      CompiledIteratorDef iterDef = (CompiledIteratorDef) o;
      context.addDependencies(new CompiledID("dummy"), iterDef.computeDependencies(context));
      RuntimeIterator rIter = iterDef.getRuntimeIterator(context);
      context.bindIterator(rIter);
      context.addToIndependentRuntimeItrMap(iterDef);
    }
    CompiledPath cp = new CompiledPath(new CompiledID("pf"), "status");

    // TASK ICM1
    String[] defintions = {SEPARATOR + "portfolios", "index_iter1.positions"};
    IndexData id =
        IndexUtils.findIndex(SEPARATOR + "portfolios", defintions, cp, "*", CacheUtils.getCache(),
            true, context);
    Assert.assertEquals(id.getMatchLevel(), 0);
    Assert.assertEquals(id.getMapping()[0], 1);
    Assert.assertEquals(id.getMapping()[1], 2);
    String[] defintions1 = {SEPARATOR + "portfolios"};
    IndexData id1 =
        IndexUtils.findIndex(SEPARATOR + "portfolios", defintions1, cp, "*", CacheUtils.getCache(),
            true, context);
    Assert.assertEquals(id1.getMatchLevel(), -1);
    Assert.assertEquals(id1.getMapping()[0], 1);
    String[] defintions2 = {SEPARATOR + "portfolios", "index_iter1.positions", "index_iter1.coll1"};
    IndexData id2 =
        IndexUtils.findIndex(SEPARATOR + "portfolios", defintions2, cp, "*", CacheUtils.getCache(),
            true, context);
    Assert.assertEquals(id2.getMatchLevel(), 1);
    Assert.assertEquals(id2.getMapping()[0], 1);
    Assert.assertEquals(id2.getMapping()[1], 2);
    Assert.assertEquals(id2.getMapping()[2], 0);
  }
This test is for a fix for #47475 We added a way to determine whether to reevaluate an entry
for query execution The method is to keep track of the delta and current time in a single long
value The value is then used by the query to determine if a region entry needs to be
reevaluated based on subtracting the value with the query execution time. This provides a delta
+ some false positive time If the delta + last modified time of the region entry is > query
start time, we can assume that it needs to be reevaluated
geode-core/src/integrationTest/java/org/apache/geode/cache/query/internal/IndexManagerJUnitTest.java