Examples with Enumerable org.apache.calcite.linq4j.Enumerable used on opensource projects

Example 1 with Enumerable

use of org.apache.calcite.linq4j.Enumerable in project druid by druid-io.

the class DruidPlanner method planWithBindableConvention.

private PlannerResult planWithBindableConvention(final SqlExplain explain, final RelRoot root) throws RelConversionException {
    BindableRel bindableRel = (BindableRel) planner.transform(Rules.BINDABLE_CONVENTION_RULES, planner.getEmptyTraitSet().replace(BindableConvention.INSTANCE).plus(root.collation), root.rel);
    if (!root.isRefTrivial()) {
        // Add a projection on top to accommodate root.fields.
        final List<RexNode> projects = new ArrayList<>();
        final RexBuilder rexBuilder = bindableRel.getCluster().getRexBuilder();
        for (int field : Pair.left(root.fields)) {
            projects.add(rexBuilder.makeInputRef(bindableRel, field));
        }
        bindableRel = new Bindables.BindableProject(bindableRel.getCluster(), bindableRel.getTraitSet(), bindableRel, projects, root.validatedRowType);
    }
    if (explain != null) {
        return planExplanation(bindableRel, explain);
    } else {
        final BindableRel theRel = bindableRel;
        final DataContext dataContext = plannerContext.createDataContext((JavaTypeFactory) planner.getTypeFactory());
        final Supplier<Sequence<Object[]>> resultsSupplier = new Supplier<Sequence<Object[]>>() {

            @Override
            public Sequence<Object[]> get() {
                final Enumerable enumerable = theRel.bind(dataContext);
                return Sequences.simple(enumerable);
            }
        };
        return new PlannerResult(resultsSupplier, root.validatedRowType);
    }
}