Fragment[] frags = StorageManager.splitNG(conf, "employee", employeeMeta, tableDir, Integer.MAX_VALUE);
TaskAttemptContext
ctx = new TaskAttemptContext(conf, LocalTajoTestingUtility.newQueryUnitAttemptId(),
new Fragment[] {frags[0]}, testDir);
Expr expr = analyzer.parse(SORT_QUERY[0]);
LogicalPlan plan = planner.createPlan(expr);
LogicalNode rootNode = optimizer.optimize(plan);
PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf,sm);
PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);