Examples with LocalGroupingProperty org.apache.hyracks.algebricks.core.algebra.properties.LocalGroupingProperty used on opensource projects

Example 6 with LocalGroupingProperty

use of org.apache.hyracks.algebricks.core.algebra.properties.LocalGroupingProperty in project asterixdb by apache.

the class AbstractPreclusteredGroupByPOperator method getPropagatedProperty.

// Returns the local structure property that is propagated from an input local structure property
// through a pre-clustered GROUP BY physical operator.
private ILocalStructuralProperty getPropagatedProperty(ILocalStructuralProperty lsp, GroupByOperator gby) {
    PropertyType propertyType = lsp.getPropertyType();
    if (propertyType == PropertyType.LOCAL_GROUPING_PROPERTY) {
        // A new grouping property is generated.
        return new LocalGroupingProperty(new ListSet<>(gby.getGbyVarList()));
    } else {
        LocalOrderProperty lop = (LocalOrderProperty) lsp;
        List<OrderColumn> orderColumns = new ArrayList<>();
        for (OrderColumn oc : lop.getOrderColumns()) {
            LogicalVariable v2 = getLhsGbyVar(gby, oc.getColumn());
            if (v2 != null) {
                orderColumns.add(new OrderColumn(v2, oc.getOrder()));
            } else {
                break;
            }
        }
        // maintained.
        return orderColumns.isEmpty() ? null : new LocalOrderProperty(orderColumns);
    }
}

Example 7 with LocalGroupingProperty

use of org.apache.hyracks.algebricks.core.algebra.properties.LocalGroupingProperty in project asterixdb by apache.

the class EnforceStructuralPropertiesRule method addLocalEnforcers.

private void addLocalEnforcers(AbstractLogicalOperator op, int i, List<ILocalStructuralProperty> localProperties, boolean nestedPlan, IOptimizationContext context) throws AlgebricksException {
    if (AlgebricksConfig.DEBUG) {
        AlgebricksConfig.ALGEBRICKS_LOGGER.fine(">>>> Adding local enforcers for local props = " + localProperties + "\n");
    }
    if (localProperties == null || localProperties.isEmpty()) {
        return;
    }
    Mutable<ILogicalOperator> topOp = new MutableObject<>();
    topOp.setValue(op.getInputs().get(i).getValue());
    LinkedList<LocalOrderProperty> oList = new LinkedList<>();
    for (ILocalStructuralProperty prop : localProperties) {
        switch(prop.getPropertyType()) {
            case LOCAL_ORDER_PROPERTY:
                {
                    oList.add((LocalOrderProperty) prop);
                    break;
                }
            case LOCAL_GROUPING_PROPERTY:
                {
                    LocalGroupingProperty g = (LocalGroupingProperty) prop;
                    Collection<LogicalVariable> vars = (g.getPreferredOrderEnforcer() != null) ? g.getPreferredOrderEnforcer() : g.getColumnSet();
                    List<OrderColumn> orderColumns = new ArrayList<>();
                    for (LogicalVariable v : vars) {
                        OrderColumn oc = new OrderColumn(v, OrderKind.ASC);
                        orderColumns.add(oc);
                    }
                    LocalOrderProperty lop = new LocalOrderProperty(orderColumns);
                    oList.add(lop);
                    break;
                }
            default:
                {
                    throw new IllegalStateException();
                }
        }
    }
    if (!oList.isEmpty()) {
        topOp = enforceOrderProperties(oList, topOp, nestedPlan, context);
    }
    op.getInputs().set(i, topOp);
    OperatorPropertiesUtil.computeSchemaAndPropertiesRecIfNull((AbstractLogicalOperator) topOp.getValue(), context);
    OperatorManipulationUtil.setOperatorMode(op);
    printOp((AbstractLogicalOperator) topOp.getValue());
}

Example 8 with LocalGroupingProperty

use of org.apache.hyracks.algebricks.core.algebra.properties.LocalGroupingProperty in project asterixdb by apache.

the class FDsAndEquivClassesVisitor method visitGroupByOperator.

@Override
public Void visitGroupByOperator(GroupByOperator op, IOptimizationContext ctx) throws AlgebricksException {
    Map<LogicalVariable, EquivalenceClass> equivalenceClasses = new HashMap<LogicalVariable, EquivalenceClass>();
    List<FunctionalDependency> functionalDependencies = new ArrayList<FunctionalDependency>();
    ctx.putEquivalenceClassMap(op, equivalenceClasses);
    ctx.putFDList(op, functionalDependencies);
    List<FunctionalDependency> inheritedFDs = new ArrayList<FunctionalDependency>();
    for (ILogicalPlan p : op.getNestedPlans()) {
        for (Mutable<ILogicalOperator> r : p.getRoots()) {
            ILogicalOperator op2 = r.getValue();
            equivalenceClasses.putAll(getOrComputeEqClasses(op2, ctx));
            inheritedFDs.addAll(getOrComputeFDs(op2, ctx));
        }
    }
    ILogicalOperator op0 = op.getInputs().get(0).getValue();
    inheritedFDs.addAll(getOrComputeFDs(op0, ctx));
    Map<LogicalVariable, EquivalenceClass> inheritedEcs = getOrComputeEqClasses(op0, ctx);
    for (FunctionalDependency inherited : inheritedFDs) {
        boolean isCoveredByGbyOrDecorVars = true;
        List<LogicalVariable> newHead = new ArrayList<LogicalVariable>(inherited.getHead().size());
        for (LogicalVariable v : inherited.getHead()) {
            LogicalVariable vnew = getNewGbyVar(op, v);
            if (vnew == null) {
                vnew = getNewDecorVar(op, v);
                if (vnew == null) {
                    isCoveredByGbyOrDecorVars = false;
                }
                break;
            }
            newHead.add(vnew);
        }
        if (isCoveredByGbyOrDecorVars) {
            List<LogicalVariable> newTail = new ArrayList<LogicalVariable>();
            for (LogicalVariable v2 : inherited.getTail()) {
                LogicalVariable v3 = getNewGbyVar(op, v2);
                if (v3 != null) {
                    newTail.add(v3);
                }
            }
            if (!newTail.isEmpty()) {
                FunctionalDependency newFd = new FunctionalDependency(newHead, newTail);
                functionalDependencies.add(newFd);
            }
        }
    }
    List<LogicalVariable> premiseGby = new LinkedList<LogicalVariable>();
    List<Pair<LogicalVariable, Mutable<ILogicalExpression>>> gByList = op.getGroupByList();
    for (Pair<LogicalVariable, Mutable<ILogicalExpression>> p : gByList) {
        premiseGby.add(p.first);
    }
    List<Pair<LogicalVariable, Mutable<ILogicalExpression>>> decorList = op.getDecorList();
    LinkedList<LogicalVariable> conclDecor = new LinkedList<LogicalVariable>();
    for (Pair<LogicalVariable, Mutable<ILogicalExpression>> p : decorList) {
        conclDecor.add(GroupByOperator.getDecorVariable(p));
    }
    if (!conclDecor.isEmpty()) {
        functionalDependencies.add(new FunctionalDependency(premiseGby, conclDecor));
    }
    Set<LogicalVariable> gbySet = new HashSet<LogicalVariable>();
    for (Pair<LogicalVariable, Mutable<ILogicalExpression>> p : gByList) {
        ILogicalExpression expr = p.second.getValue();
        if (expr.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
            VariableReferenceExpression v = (VariableReferenceExpression) expr;
            gbySet.add(v.getVariableReference());
        }
    }
    LocalGroupingProperty lgp = new LocalGroupingProperty(gbySet);
    ILocalStructuralProperty normalizedLgp = lgp.normalize(inheritedEcs, inheritedFDs);
    Set<LogicalVariable> normSet = new ListSet<>();
    normalizedLgp.getColumns(normSet);
    List<Pair<LogicalVariable, Mutable<ILogicalExpression>>> newGbyList = new ArrayList<>();
    boolean changed = false;
    for (Pair<LogicalVariable, Mutable<ILogicalExpression>> p : gByList) {
        ILogicalExpression expr = p.second.getValue();
        if (expr.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
            VariableReferenceExpression varRef = (VariableReferenceExpression) expr;
            LogicalVariable v2 = varRef.getVariableReference();
            EquivalenceClass ec2 = inheritedEcs.get(v2);
            LogicalVariable v3;
            if (ec2 != null && !ec2.representativeIsConst()) {
                v3 = ec2.getVariableRepresentative();
            } else {
                v3 = v2;
            }
            if (normSet.contains(v3)) {
                newGbyList.add(p);
            } else {
                changed = true;
                decorList.add(p);
            }
        } else {
            newGbyList.add(p);
        }
    }
    if (changed) {
        AlgebricksConfig.ALGEBRICKS_LOGGER.fine(">>>> Group-by list changed from " + GroupByOperator.veListToString(gByList) + " to " + GroupByOperator.veListToString(newGbyList) + ".\n");
    }
    gByList.clear();
    gByList.addAll(newGbyList);
    return null;
}