Examples with SplittingParallelizer org.apache.drill.exec.planner.fragment.contrib.SplittingParallelizer used on opensource projects

Example 1 with SplittingParallelizer

use of org.apache.drill.exec.planner.fragment.contrib.SplittingParallelizer in project drill by apache.

the class PlanSplitter method getFragments.

private List<PlanFragment> getFragments(final DrillbitContext dContext, final GetQueryPlanFragments req, final QueryContext queryContext, final QueryId queryId) throws Exception {
    final PhysicalPlan plan;
    final String query = req.getQuery();
    switch(req.getType()) {
        case SQL:
            final Pointer<String> textPlan = new Pointer<>();
            plan = DrillSqlWorker.getPlan(queryContext, query, textPlan);
            break;
        case PHYSICAL:
            plan = dContext.getPlanReader().readPhysicalPlan(query);
            break;
        default:
            throw new IllegalStateException("Planning fragments supports only SQL or PHYSICAL QueryType");
    }
    MemoryAllocationUtilities.setupSortMemoryAllocations(plan, queryContext);
    final PhysicalOperator rootOperator = plan.getSortedOperators(false).iterator().next();
    final Fragment rootFragment = rootOperator.accept(MakeFragmentsVisitor.INSTANCE, null);
    final SimpleParallelizer parallelizer = new SplittingParallelizer(queryContext);
    List<PlanFragment> fragments = Lists.newArrayList();
    if (req.getSplitPlan()) {
        final List<QueryWorkUnit> queryWorkUnits = parallelizer.getSplitFragments(queryContext.getOptions().getOptionList(), queryContext.getCurrentEndpoint(), queryId, queryContext.getActiveEndpoints(), dContext.getPlanReader(), rootFragment, queryContext.getSession(), queryContext.getQueryContextInfo());
        for (QueryWorkUnit queryWorkUnit : queryWorkUnits) {
            fragments.add(queryWorkUnit.getRootFragment());
            List<PlanFragment> childFragments = queryWorkUnit.getFragments();
            if (!childFragments.isEmpty()) {
                throw new IllegalStateException("Split plans can not have more then one fragment");
            }
        }
    } else {
        final QueryWorkUnit queryWorkUnit = parallelizer.getFragments(queryContext.getOptions().getOptionList(), queryContext.getCurrentEndpoint(), queryId, queryContext.getActiveEndpoints(), dContext.getPlanReader(), rootFragment, queryContext.getSession(), queryContext.getQueryContextInfo());
        fragments.add(queryWorkUnit.getRootFragment());
        fragments.addAll(queryWorkUnit.getFragments());
    }
    return fragments;
}