Examples with HashPartitionMergeExchangePOperator org.apache.hyracks.algebricks.core.algebra.operators.physical.HashPartitionMergeExchangePOperator used on opensource projects

Example 1 with HashPartitionMergeExchangePOperator

use of org.apache.hyracks.algebricks.core.algebra.operators.physical.HashPartitionMergeExchangePOperator in project asterixdb by apache.

the class RemoveUnnecessarySortMergeExchange method rewritePost.

@Override
public boolean rewritePost(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
    AbstractLogicalOperator op1 = (AbstractLogicalOperator) opRef.getValue();
    if (op1.getPhysicalOperator() == null || (op1.getPhysicalOperator().getOperatorTag() != PhysicalOperatorTag.HASH_PARTITION_EXCHANGE && op1.getPhysicalOperator().getOperatorTag() != PhysicalOperatorTag.HASH_PARTITION_MERGE_EXCHANGE)) {
        return false;
    }
    Mutable<ILogicalOperator> currentOpRef = op1.getInputs().get(0);
    AbstractLogicalOperator currentOp = (AbstractLogicalOperator) currentOpRef.getValue();
    // Goes down the pipeline to find a qualified SortMergeExchange to eliminate.
    while (currentOp != null) {
        IPhysicalOperator physicalOp = currentOp.getPhysicalOperator();
        if (physicalOp == null) {
            return false;
        } else if (physicalOp.getOperatorTag() == PhysicalOperatorTag.SORT_MERGE_EXCHANGE) {
            break;
        } else if (!currentOp.isMap() || currentOp.getOperatorTag() == LogicalOperatorTag.UNNEST || currentOp.getOperatorTag() == LogicalOperatorTag.LIMIT) {
            // we need to use his new property in logical operator to check order sensitivity.
            return false;
        } else if (currentOp.getInputs().size() == 1) {
            currentOpRef = currentOp.getInputs().get(0);
            currentOp = (AbstractLogicalOperator) currentOpRef.getValue();
        } else {
            currentOp = null;
        }
    }
    if (currentOp == null) {
        // There is no such qualified SortMergeExchange.
        return false;
    }
    if (op1.getPhysicalOperator().getOperatorTag() == PhysicalOperatorTag.HASH_PARTITION_MERGE_EXCHANGE) {
        // If op1 is a hash_partition_merge_exchange, the sort_merge_exchange can be simply removed.
        currentOpRef.setValue(currentOp.getInputs().get(0).getValue());
        op1.computeDeliveredPhysicalProperties(context);
        return true;
    }
    // Checks whether sort columns in the SortMergeExchange are still available at op1.
    // If yes, we use HashMergeExchange; otherwise, we use HashExchange.
    SortMergeExchangePOperator sme = (SortMergeExchangePOperator) currentOp.getPhysicalOperator();
    HashPartitionExchangePOperator hpe = (HashPartitionExchangePOperator) op1.getPhysicalOperator();
    Set<LogicalVariable> liveVars = new HashSet<LogicalVariable>();
    VariableUtilities.getLiveVariables(op1, liveVars);
    boolean usingHashMergeExchange = true;
    for (OrderColumn oc : sme.getSortColumns()) {
        if (!liveVars.contains(oc.getColumn())) {
            usingHashMergeExchange = false;
        }
    }
    if (usingHashMergeExchange) {
        // Add sort columns from the SortMergeExchange into a new HashMergeExchange.
        List<OrderColumn> ocList = new ArrayList<OrderColumn>();
        for (OrderColumn oc : sme.getSortColumns()) {
            ocList.add(oc);
        }
        HashPartitionMergeExchangePOperator hpme = new HashPartitionMergeExchangePOperator(ocList, hpe.getHashFields(), hpe.getDomain());
        op1.setPhysicalOperator(hpme);
    }
    // Remove the SortMergeExchange op.
    currentOpRef.setValue(currentOp.getInputs().get(0).getValue());
    // Re-compute delivered properties at op1.
    op1.computeDeliveredPhysicalProperties(context);
    return true;
}

Example 2 with HashPartitionMergeExchangePOperator

use of org.apache.hyracks.algebricks.core.algebra.operators.physical.HashPartitionMergeExchangePOperator in project asterixdb by apache.

the class EnforceStructuralPropertiesRule method addPartitioningEnforcers.

private void addPartitioningEnforcers(ILogicalOperator op, int i, IPartitioningProperty pp, IPhysicalPropertiesVector required, IPhysicalPropertiesVector deliveredByChild, INodeDomain domain, IOptimizationContext context) throws AlgebricksException {
    if (pp != null) {
        IPhysicalOperator pop;
        switch(pp.getPartitioningType()) {
            case UNPARTITIONED:
                {
                    List<OrderColumn> ordCols = computeOrderColumns(deliveredByChild);
                    if (ordCols.isEmpty()) {
                        pop = new RandomMergeExchangePOperator();
                    } else {
                        if (op.getAnnotations().containsKey(OperatorAnnotations.USE_RANGE_CONNECTOR)) {
                            IRangeMap rangeMap = (IRangeMap) op.getAnnotations().get(OperatorAnnotations.USE_RANGE_CONNECTOR);
                            pop = new RangePartitionMergeExchangePOperator(ordCols, domain, rangeMap);
                        } else {
                            OrderColumn[] sortColumns = new OrderColumn[ordCols.size()];
                            sortColumns = ordCols.toArray(sortColumns);
                            pop = new SortMergeExchangePOperator(sortColumns);
                        }
                    }
                    break;
                }
            case UNORDERED_PARTITIONED:
                {
                    List<LogicalVariable> varList = new ArrayList<>(((UnorderedPartitionedProperty) pp).getColumnSet());
                    String hashMergeHint = context.getMetadataProvider().getConfig().get(HASH_MERGE);
                    if (hashMergeHint == null || !hashMergeHint.equalsIgnoreCase(TRUE_CONSTANT)) {
                        pop = new HashPartitionExchangePOperator(varList, domain);
                        break;
                    }
                    List<ILocalStructuralProperty> cldLocals = deliveredByChild.getLocalProperties();
                    List<ILocalStructuralProperty> reqdLocals = required.getLocalProperties();
                    boolean propWasSet = false;
                    pop = null;
                    if (reqdLocals != null && cldLocals != null && allAreOrderProps(cldLocals)) {
                        AbstractLogicalOperator c = (AbstractLogicalOperator) op.getInputs().get(i).getValue();
                        Map<LogicalVariable, EquivalenceClass> ecs = context.getEquivalenceClassMap(c);
                        List<FunctionalDependency> fds = context.getFDList(c);
                        if (PropertiesUtil.matchLocalProperties(reqdLocals, cldLocals, ecs, fds)) {
                            List<OrderColumn> orderColumns = getOrderColumnsFromGroupingProperties(reqdLocals, cldLocals);
                            pop = new HashPartitionMergeExchangePOperator(orderColumns, varList, domain);
                            propWasSet = true;
                        }
                    }
                    if (!propWasSet) {
                        pop = new HashPartitionExchangePOperator(varList, domain);
                    }
                    break;
                }
            case ORDERED_PARTITIONED:
                {
                    pop = new RangePartitionExchangePOperator(((OrderedPartitionedProperty) pp).getOrderColumns(), domain, null);
                    break;
                }
            case BROADCAST:
                {
                    pop = new BroadcastExchangePOperator(domain);
                    break;
                }
            case RANDOM:
                {
                    RandomPartitioningProperty rpp = (RandomPartitioningProperty) pp;
                    INodeDomain nd = rpp.getNodeDomain();
                    pop = new RandomPartitionExchangePOperator(nd);
                    break;
                }
            default:
                {
                    throw new NotImplementedException("Enforcer for " + pp.getPartitioningType() + " partitioning type has not been implemented.");
                }
        }
        Mutable<ILogicalOperator> ci = op.getInputs().get(i);
        ExchangeOperator exchg = new ExchangeOperator();
        exchg.setPhysicalOperator(pop);
        setNewOp(ci, exchg, context);
        exchg.setExecutionMode(AbstractLogicalOperator.ExecutionMode.PARTITIONED);
        OperatorPropertiesUtil.computeSchemaAndPropertiesRecIfNull(exchg, context);
        context.computeAndSetTypeEnvironmentForOperator(exchg);
        if (AlgebricksConfig.DEBUG) {
            AlgebricksConfig.ALGEBRICKS_LOGGER.fine(">>>> Added partitioning enforcer " + exchg.getPhysicalOperator() + ".\n");
            printOp((AbstractLogicalOperator) op);
        }
    }
}