TaskAttemptContext ctx = new TaskAttemptContext(conf,
LocalTajoTestingUtility.newQueryUnitAttemptId(), merged, workDir);
Expr expr = analyzer.parse(QUERIES[0]);
LogicalNode plan = planner.createPlan(expr).getRootBlock().getRoot();
PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf, sm);
PhysicalExec exec = phyPlanner.createPlan(ctx, plan);
ProjectionExec proj = (ProjectionExec) exec;
if (proj.getChild() instanceof RightOuterMergeJoinExec) {
//for this small data set this is not likely to happen