Examples with RexLocalRef org.apache.calcite.rex.RexLocalRef used on opensource projects

Example 1 with RexLocalRef

use of org.apache.calcite.rex.RexLocalRef in project storm by apache.

the class TridentCalcRel method tridentPlan.

@Override
public void tridentPlan(TridentPlanCreator planCreator) throws Exception {
    // SingleRel
    RelNode input = getInput();
    StormRelUtils.getStormRelInput(input).tridentPlan(planCreator);
    Stream inputStream = planCreator.pop().toStream();
    String stageName = StormRelUtils.getStageName(this);
    RelDataType inputRowType = getInput(0).getRowType();
    List<String> outputFieldNames = getRowType().getFieldNames();
    int outputCount = outputFieldNames.size();
    // filter
    ExecutableExpression filterInstance = null;
    RexLocalRef condition = program.getCondition();
    if (condition != null) {
        RexNode conditionNode = program.expandLocalRef(condition);
        filterInstance = planCreator.createScalarInstance(Lists.newArrayList(conditionNode), inputRowType, StormRelUtils.getClassName(this));
    }
    // projection
    ExecutableExpression projectionInstance = null;
    List<RexLocalRef> projectList = program.getProjectList();
    if (projectList != null && !projectList.isEmpty()) {
        List<RexNode> expandedNodes = new ArrayList<>();
        for (RexLocalRef project : projectList) {
            expandedNodes.add(program.expandLocalRef(project));
        }
        projectionInstance = planCreator.createScalarInstance(expandedNodes, inputRowType, StormRelUtils.getClassName(this));
    }
    if (projectionInstance == null && filterInstance == null) {
        // it shouldn't be happen
        throw new IllegalStateException("Either projection or condition, or both should be provided.");
    }
    final Stream finalStream = inputStream.flatMap(new EvaluationCalc(filterInstance, projectionInstance, outputCount, planCreator.getDataContext()), new Fields(outputFieldNames)).name(stageName);
    planCreator.addStream(finalStream);
}

Example 2 with RexLocalRef

use of org.apache.calcite.rex.RexLocalRef in project calcite by apache.

the class LogicalWindow method toInputRefs.

private static List<RexNode> toInputRefs(final List<? extends RexNode> operands) {
    return new AbstractList<RexNode>() {

        public int size() {
            return operands.size();
        }

        public RexNode get(int index) {
            final RexNode operand = operands.get(index);
            if (operand instanceof RexInputRef) {
                return operand;
            }
            assert operand instanceof RexLocalRef;
            final RexLocalRef ref = (RexLocalRef) operand;
            return new RexInputRef(ref.getIndex(), ref.getType());
        }
    };
}

Example 3 with RexLocalRef

use of org.apache.calcite.rex.RexLocalRef in project calcite by apache.

the class LogicalWindow method addWindows.

private static void addWindows(Multimap<WindowKey, RexOver> windowMap, RexOver over, final int inputFieldCount) {
    final RexWindow aggWindow = over.getWindow();
    // Look up or create a window.
    RelCollation orderKeys = getCollation(Lists.newArrayList(Iterables.filter(aggWindow.orderKeys, new PredicateImpl<RexFieldCollation>() {

        public boolean test(RexFieldCollation rexFieldCollation) {
            // then we can ignore such ORDER BY key.
            return rexFieldCollation.left instanceof RexLocalRef;
        }
    })));
    ImmutableBitSet groupSet = ImmutableBitSet.of(getProjectOrdinals(aggWindow.partitionKeys));
    final int groupLength = groupSet.length();
    if (inputFieldCount < groupLength) {
        // If PARTITION BY references constant, we can ignore such partition key.
        // All the inputs after inputFieldCount are literals, thus we can clear.
        groupSet = groupSet.except(ImmutableBitSet.range(inputFieldCount, groupLength));
    }
    WindowKey windowKey = new WindowKey(groupSet, orderKeys, aggWindow.isRows(), aggWindow.getLowerBound(), aggWindow.getUpperBound());
    windowMap.put(windowKey, over);
}

Example 4 with RexLocalRef

use of org.apache.calcite.rex.RexLocalRef in project calcite by apache.

the class RexToLixTranslator method deref.

/**
 * Dereferences an expression if it is a
 * {@link org.apache.calcite.rex.RexLocalRef}.
 */
public RexNode deref(RexNode expr) {
    if (expr instanceof RexLocalRef) {
        RexLocalRef ref = (RexLocalRef) expr;
        final RexNode e2 = program.getExprList().get(ref.getIndex());
        assert ref.getType().equals(e2.getType());
        return e2;
    } else {
        return expr;
    }
}

Example 5 with RexLocalRef

use of org.apache.calcite.rex.RexLocalRef in project calcite by apache.

the class CalcRelSplitter method computeTopologicalOrdering.

/**
 * Computes the order in which to visit expressions, so that we decide the
 * level of an expression only after the levels of lower expressions have
 * been decided.
 *
 * <p>First, we need to ensure that an expression is visited after all of
 * its inputs.
 *
 * <p>Further, if the expression is a member of a cohort, we need to visit
 * it after the inputs of all other expressions in that cohort. With this
 * condition, expressions in the same cohort will very likely end up in the
 * same level.
 *
 * <p>Note that if there are no cohorts, the expressions from the
 * {@link RexProgram} are already in a suitable order. We perform the
 * topological sort just to ensure that the code path is well-trodden.
 *
 * @param exprs   Expressions
 * @param cohorts List of cohorts, each of which is a set of expr ordinals
 * @return Expression ordinals in topological order
 */
private List<Integer> computeTopologicalOrdering(RexNode[] exprs, List<Set<Integer>> cohorts) {
    final DirectedGraph<Integer, DefaultEdge> graph = DefaultDirectedGraph.create();
    for (int i = 0; i < exprs.length; i++) {
        graph.addVertex(i);
    }
    for (int i = 0; i < exprs.length; i++) {
        final RexNode expr = exprs[i];
        final Set<Integer> cohort = findCohort(cohorts, i);
        final Set<Integer> targets;
        if (cohort == null) {
            targets = Collections.singleton(i);
        } else {
            targets = cohort;
        }
        expr.accept(new RexVisitorImpl<Void>(true) {

            public Void visitLocalRef(RexLocalRef localRef) {
                for (Integer target : targets) {
                    graph.addEdge(localRef.getIndex(), target);
                }
                return null;
            }
        });
    }
    TopologicalOrderIterator<Integer, DefaultEdge> iter = new TopologicalOrderIterator<>(graph);
    final List<Integer> permutation = new ArrayList<>();
    while (iter.hasNext()) {
        permutation.add(iter.next());
    }
    return permutation;
}