Path workDir = CommonTestingUtil.getTestDir(
"target/test-data/testPartitionedStorePlanWithEmptyGroupingSet");
TaskAttemptContext ctx = new TaskAttemptContext(conf, id, new Fragment[] { frags[0] }, workDir);
ctx.setEnforcer(new Enforcer());
Expr expr = analyzer.parse(QUERIES[14]);
LogicalPlan plan = planner.createPlan(expr);
LogicalNode rootNode = plan.getRootBlock().getRoot();
int numPartitions = 1;
DataChannel dataChannel = new DataChannel(masterPlan.newExecutionBlockId(), masterPlan.newExecutionBlockId(),
PartitionType.HASH_PARTITION, numPartitions);