Examples with ILogicalExpression org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression used on opensource projects

Example 11 with ILogicalExpression

use of org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression in project asterixdb by apache.

the class PushAggregateIntoNestedSubplanRule method extractAggFunctionsFromExpression.

/**
     * @param exprRef
     * @param nspWithAgg
     * @param context
     * @return a pair whose first member is a boolean which is true iff
     *         something was changed in the expression tree rooted at expr. The
     *         second member is the result of transforming expr.
     * @throws AlgebricksException
     */
private Pair<Boolean, ILogicalExpression> extractAggFunctionsFromExpression(Mutable<ILogicalExpression> exprRef, Map<LogicalVariable, AbstractOperatorWithNestedPlans> nspWithAgg, Map<ILogicalExpression, ILogicalExpression> aggregateExprToVarExpr, IOptimizationContext context) throws AlgebricksException {
    ILogicalExpression expr = exprRef.getValue();
    switch(expr.getExpressionTag()) {
        case FUNCTION_CALL:
            AbstractFunctionCallExpression fce = (AbstractFunctionCallExpression) expr;
            FunctionIdentifier fi = BuiltinFunctions.getAggregateFunction(fce.getFunctionIdentifier());
            if (fi != null) {
                ILogicalExpression a1 = fce.getArguments().get(0).getValue();
                if (a1.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
                    LogicalVariable argVar = ((VariableReferenceExpression) a1).getVariableReference();
                    AbstractOperatorWithNestedPlans nspOp = nspWithAgg.get(argVar);
                    if (nspOp != null) {
                        if (!aggregateExprToVarExpr.containsKey(expr)) {
                            LogicalVariable newVar = context.newVar();
                            AggregateFunctionCallExpression aggFun = BuiltinFunctions.makeAggregateFunctionExpression(fi, fce.getArguments());
                            rewriteAggregateInNestedSubplan(argVar, nspOp, aggFun, newVar, context);
                            ILogicalExpression newVarExpr = new VariableReferenceExpression(newVar);
                            aggregateExprToVarExpr.put(expr, newVarExpr);
                            return new Pair<>(Boolean.TRUE, newVarExpr);
                        } else {
                            ILogicalExpression varExpr = aggregateExprToVarExpr.get(expr);
                            return new Pair<>(Boolean.TRUE, varExpr);
                        }
                    }
                }
            }
            boolean change = false;
            for (Mutable<ILogicalExpression> a : fce.getArguments()) {
                Pair<Boolean, ILogicalExpression> aggArg = extractAggFunctionsFromExpression(a, nspWithAgg, aggregateExprToVarExpr, context);
                if (aggArg.first.booleanValue()) {
                    a.setValue(aggArg.second);
                    change = true;
                }
            }
            return new Pair<>(change, fce);
        case VARIABLE:
        case CONSTANT:
            return new Pair<>(Boolean.FALSE, expr);
        default:
            throw new IllegalArgumentException();
    }
}

Example 12 with ILogicalExpression

use of org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression in project asterixdb by apache.

the class PushAggregateIntoNestedSubplanRule method rewriteAggregateInNestedSubplan.

private void rewriteAggregateInNestedSubplan(LogicalVariable oldAggVar, AbstractOperatorWithNestedPlans nspOp, AggregateFunctionCallExpression aggFun, LogicalVariable newAggVar, IOptimizationContext context) throws AlgebricksException {
    for (int j = 0; j < nspOp.getNestedPlans().size(); j++) {
        AggregateOperator aggOp = (AggregateOperator) nspOp.getNestedPlans().get(j).getRoots().get(0).getValue();
        int n = aggOp.getVariables().size();
        for (int i = 0; i < n; i++) {
            LogicalVariable v = aggOp.getVariables().get(i);
            if (v.equals(oldAggVar)) {
                AbstractFunctionCallExpression oldAggExpr = (AbstractFunctionCallExpression) aggOp.getExpressions().get(i).getValue();
                AggregateFunctionCallExpression newAggFun = BuiltinFunctions.makeAggregateFunctionExpression(aggFun.getFunctionIdentifier(), new ArrayList<>());
                for (Mutable<ILogicalExpression> arg : oldAggExpr.getArguments()) {
                    ILogicalExpression cloned = arg.getValue().cloneExpression();
                    newAggFun.getArguments().add(new MutableObject<>(cloned));
                }
                aggOp.getVariables().add(newAggVar);
                aggOp.getExpressions().add(new MutableObject<>(newAggFun));
                context.computeAndSetTypeEnvironmentForOperator(aggOp);
                break;
            }
        }
    }
}

Example 13 with ILogicalExpression

use of org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression in project asterixdb by apache.

the class PushAggregateIntoNestedSubplanRule method pushSubplanAsAggIntoNestedSubplan.

private boolean pushSubplanAsAggIntoNestedSubplan(Mutable<ILogicalOperator> subplanOpRef, AbstractOperatorWithNestedPlans nspOp, LogicalVariable varFromNestedAgg, Map<LogicalVariable, Integer> nspAggVars, Map<LogicalVariable, AbstractOperatorWithNestedPlans> nspWithAgg, Map<LogicalVariable, Integer> nspAggVarToPlanIndex, IOptimizationContext context) throws AlgebricksException {
    SubplanOperator subplan = (SubplanOperator) subplanOpRef.getValue();
    // only free var can be varFromNestedAgg
    HashSet<LogicalVariable> freeVars = new HashSet<>();
    OperatorPropertiesUtil.getFreeVariablesInSubplans(subplan, freeVars);
    for (LogicalVariable vFree : freeVars) {
        if (!vFree.equals(varFromNestedAgg)) {
            return false;
        }
    }
    List<ILogicalPlan> plans = subplan.getNestedPlans();
    if (plans.size() > 1) {
        return false;
    }
    ILogicalPlan p = plans.get(0);
    if (p.getRoots().size() > 1) {
        return false;
    }
    Mutable<ILogicalOperator> opRef = p.getRoots().get(0);
    AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
    if (op.getOperatorTag() != LogicalOperatorTag.AGGREGATE) {
        return false;
    }
    AggregateOperator aggInSubplanOp = (AggregateOperator) op;
    LogicalVariable unnestVar = null;
    boolean pushableNestedSubplan = false;
    while (op.getInputs().size() == 1) {
        opRef = op.getInputs().get(0);
        op = (AbstractLogicalOperator) opRef.getValue();
        switch(op.getOperatorTag()) {
            case ASSIGN:
                break;
            case UNNEST:
                UnnestOperator unnest = (UnnestOperator) op;
                if (unnest.getPositionalVariable() != null) {
                    // TODO currently subplan with both accumulating and running aggregate is not supported.
                    return false;
                }
                ILogicalExpression expr = unnest.getExpressionRef().getValue();
                if (expr.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
                    return false;
                }
                AbstractFunctionCallExpression fun = (AbstractFunctionCallExpression) expr;
                if (fun.getFunctionIdentifier() != BuiltinFunctions.SCAN_COLLECTION) {
                    return false;
                }
                ILogicalExpression arg0 = fun.getArguments().get(0).getValue();
                if (arg0.getExpressionTag() != LogicalExpressionTag.VARIABLE) {
                    return false;
                }
                VariableReferenceExpression varExpr = (VariableReferenceExpression) arg0;
                if (!varExpr.getVariableReference().equals(varFromNestedAgg)) {
                    return false;
                }
                opRef = op.getInputs().get(0);
                op = (AbstractLogicalOperator) opRef.getValue();
                if (op.getOperatorTag() != LogicalOperatorTag.NESTEDTUPLESOURCE) {
                    return false;
                }
                pushableNestedSubplan = true;
                unnestVar = unnest.getVariable();
                break;
            default:
                return false;
        }
    }
    if (!pushableNestedSubplan) {
        return false;
    }
    for (int i = 0; i < nspOp.getNestedPlans().size(); i++) {
        Mutable<ILogicalOperator> nspAggRef = nspOp.getNestedPlans().get(i).getRoots().get(0);
        AggregateOperator nspAgg = (AggregateOperator) nspAggRef.getValue();
        Mutable<ILogicalOperator> nspAggChildRef = nspAgg.getInputs().get(0);
        LogicalVariable listifyVar = findListifiedVariable(nspAgg, varFromNestedAgg);
        if (listifyVar == null) {
            continue;
        }
        OperatorManipulationUtil.substituteVarRec(aggInSubplanOp, unnestVar, listifyVar, true, context);
        nspAgg.getVariables().addAll(aggInSubplanOp.getVariables());
        nspAgg.getExpressions().addAll(aggInSubplanOp.getExpressions());
        for (LogicalVariable v : aggInSubplanOp.getVariables()) {
            nspWithAgg.put(v, nspOp);
            nspAggVars.put(v, 0);
            nspAggVarToPlanIndex.put(v, i);
        }
        Mutable<ILogicalOperator> opRef1InSubplan = aggInSubplanOp.getInputs().get(0);
        if (!opRef1InSubplan.getValue().getInputs().isEmpty()) {
            Mutable<ILogicalOperator> opRef2InSubplan = opRef1InSubplan.getValue().getInputs().get(0);
            AbstractLogicalOperator op2InSubplan = (AbstractLogicalOperator) opRef2InSubplan.getValue();
            if (op2InSubplan.getOperatorTag() != LogicalOperatorTag.NESTEDTUPLESOURCE) {
                List<Mutable<ILogicalOperator>> nspInpList = nspAgg.getInputs();
                nspInpList.clear();
                nspInpList.add(opRef1InSubplan);
                while (true) {
                    opRef2InSubplan = opRef1InSubplan.getValue().getInputs().get(0);
                    op2InSubplan = (AbstractLogicalOperator) opRef2InSubplan.getValue();
                    if (op2InSubplan.getOperatorTag() == LogicalOperatorTag.UNNEST) {
                        List<Mutable<ILogicalOperator>> opInpList = opRef1InSubplan.getValue().getInputs();
                        opInpList.clear();
                        opInpList.add(nspAggChildRef);
                        break;
                    }
                    opRef1InSubplan = opRef2InSubplan;
                    if (opRef1InSubplan.getValue().getInputs().isEmpty()) {
                        throw new IllegalStateException("PushAggregateIntoNestedSubplanRule: could not find UNNEST.");
                    }
                }
            }
        }
        subplanOpRef.setValue(subplan.getInputs().get(0).getValue());
        OperatorPropertiesUtil.typeOpRec(nspAggRef, context);
    }
    return true;
}

Example 14 with ILogicalExpression

use of org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression in project asterixdb by apache.

the class PushFieldAccessRule method propagateFieldAccessRec.

@SuppressWarnings("unchecked")
private boolean propagateFieldAccessRec(Mutable<ILogicalOperator> opRef, IOptimizationContext context, String finalAnnot) throws AlgebricksException {
    AssignOperator access = (AssignOperator) opRef.getValue();
    Mutable<ILogicalOperator> opRef2 = access.getInputs().get(0);
    AbstractLogicalOperator op2 = (AbstractLogicalOperator) opRef2.getValue();
    // rewritten into index search.
    if (op2.getOperatorTag() == LogicalOperatorTag.PROJECT || context.checkAndAddToAlreadyCompared(access, op2) && !(op2.getOperatorTag() == LogicalOperatorTag.SELECT && isAccessToIndexedField(access, context))) {
        return false;
    }
    Object annotation = op2.getAnnotations().get(IS_MOVABLE);
    if (annotation != null && !((Boolean) annotation)) {
        return false;
    }
    if (tryingToPushThroughSelectionWithSameDataSource(access, op2)) {
        return false;
    }
    if (testAndModifyRedundantOp(access, op2)) {
        propagateFieldAccessRec(opRef2, context, finalAnnot);
        return true;
    }
    List<LogicalVariable> usedInAccess = new LinkedList<>();
    VariableUtilities.getUsedVariables(access, usedInAccess);
    List<LogicalVariable> produced2 = new LinkedList<>();
    if (op2.getOperatorTag() == LogicalOperatorTag.GROUP) {
        VariableUtilities.getLiveVariables(op2, produced2);
    } else {
        VariableUtilities.getProducedVariables(op2, produced2);
    }
    boolean pushItDown = false;
    List<LogicalVariable> inter = new ArrayList<>(usedInAccess);
    if (inter.isEmpty()) {
        // ground value
        return false;
    }
    inter.retainAll(produced2);
    if (inter.isEmpty()) {
        pushItDown = true;
    } else if (op2.getOperatorTag() == LogicalOperatorTag.GROUP) {
        GroupByOperator g = (GroupByOperator) op2;
        List<Pair<LogicalVariable, LogicalVariable>> varMappings = new ArrayList<>();
        for (Pair<LogicalVariable, Mutable<ILogicalExpression>> p : g.getDecorList()) {
            ILogicalExpression e = p.second.getValue();
            if (e.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
                LogicalVariable decorVar = GroupByOperator.getDecorVariable(p);
                if (inter.contains(decorVar)) {
                    inter.remove(decorVar);
                    LogicalVariable v1 = ((VariableReferenceExpression) e).getVariableReference();
                    varMappings.add(new Pair<>(decorVar, v1));
                }
            }
        }
        if (inter.isEmpty()) {
            boolean changed = false;
            for (Pair<LogicalVariable, LogicalVariable> m : varMappings) {
                LogicalVariable v2 = context.newVar();
                LogicalVariable oldVar = access.getVariables().get(0);
                g.getDecorList().add(new Pair<LogicalVariable, Mutable<ILogicalExpression>>(oldVar, new MutableObject<ILogicalExpression>(new VariableReferenceExpression(v2))));
                changed = true;
                access.getVariables().set(0, v2);
                VariableUtilities.substituteVariables(access, m.first, m.second, context);
            }
            if (changed) {
                context.computeAndSetTypeEnvironmentForOperator(g);
            }
            usedInAccess.clear();
            VariableUtilities.getUsedVariables(access, usedInAccess);
            pushItDown = true;
        }
    }
    if (pushItDown) {
        if (op2.getOperatorTag() == LogicalOperatorTag.NESTEDTUPLESOURCE) {
            Mutable<ILogicalOperator> childOfSubplan = ((NestedTupleSourceOperator) op2).getDataSourceReference().getValue().getInputs().get(0);
            pushAccessDown(opRef, op2, childOfSubplan, context, finalAnnot);
            return true;
        }
        if (op2.getInputs().size() == 1 && !op2.hasNestedPlans()) {
            pushAccessDown(opRef, op2, op2.getInputs().get(0), context, finalAnnot);
            return true;
        } else {
            for (Mutable<ILogicalOperator> inp : op2.getInputs()) {
                HashSet<LogicalVariable> v2 = new HashSet<>();
                VariableUtilities.getLiveVariables(inp.getValue(), v2);
                if (v2.containsAll(usedInAccess)) {
                    pushAccessDown(opRef, op2, inp, context, finalAnnot);
                    return true;
                }
            }
        }
        if (op2.hasNestedPlans()) {
            AbstractOperatorWithNestedPlans nestedOp = (AbstractOperatorWithNestedPlans) op2;
            for (ILogicalPlan plan : nestedOp.getNestedPlans()) {
                for (Mutable<ILogicalOperator> root : plan.getRoots()) {
                    HashSet<LogicalVariable> v2 = new HashSet<>();
                    VariableUtilities.getLiveVariables(root.getValue(), v2);
                    if (v2.containsAll(usedInAccess)) {
                        pushAccessDown(opRef, op2, root, context, finalAnnot);
                        return true;
                    }
                }
            }
        }
        throw new AlgebricksException("Field access " + access.getExpressions().get(0).getValue() + " does not correspond to any input of operator " + op2);
    } else {
        // fields. If yes, we can equate the two variables.
        if (op2.getOperatorTag() == LogicalOperatorTag.DATASOURCESCAN) {
            DataSourceScanOperator scan = (DataSourceScanOperator) op2;
            int n = scan.getVariables().size();
            LogicalVariable scanRecordVar = scan.getVariables().get(n - 1);
            AbstractFunctionCallExpression accessFun = (AbstractFunctionCallExpression) access.getExpressions().get(0).getValue();
            ILogicalExpression e0 = accessFun.getArguments().get(0).getValue();
            LogicalExpressionTag tag = e0.getExpressionTag();
            if (tag == LogicalExpressionTag.VARIABLE) {
                VariableReferenceExpression varRef = (VariableReferenceExpression) e0;
                if (varRef.getVariableReference() == scanRecordVar) {
                    ILogicalExpression e1 = accessFun.getArguments().get(1).getValue();
                    if (e1.getExpressionTag() == LogicalExpressionTag.CONSTANT) {
                        IDataSource<DataSourceId> dataSource = (IDataSource<DataSourceId>) scan.getDataSource();
                        byte dsType = ((DataSource) dataSource).getDatasourceType();
                        if (dsType == DataSource.Type.FEED || dsType == DataSource.Type.LOADABLE) {
                            return false;
                        }
                        DataSourceId asid = dataSource.getId();
                        MetadataProvider mp = (MetadataProvider) context.getMetadataProvider();
                        Dataset dataset = mp.findDataset(asid.getDataverseName(), asid.getDatasourceName());
                        if (dataset == null) {
                            throw new AlgebricksException("Dataset " + asid.getDatasourceName() + " not found.");
                        }
                        if (dataset.getDatasetType() != DatasetType.INTERNAL) {
                            setAsFinal(access, context, finalAnnot);
                            return false;
                        }
                        ConstantExpression ce = (ConstantExpression) e1;
                        IAObject obj = ((AsterixConstantValue) ce.getValue()).getObject();
                        String fldName;
                        if (obj.getType().getTypeTag() == ATypeTag.STRING) {
                            fldName = ((AString) obj).getStringValue();
                        } else {
                            int pos = ((AInt32) obj).getIntegerValue();
                            String tName = dataset.getItemTypeName();
                            IAType t = mp.findType(dataset.getItemTypeDataverseName(), tName);
                            if (t.getTypeTag() != ATypeTag.OBJECT) {
                                return false;
                            }
                            ARecordType rt = (ARecordType) t;
                            if (pos >= rt.getFieldNames().length) {
                                setAsFinal(access, context, finalAnnot);
                                return false;
                            }
                            fldName = rt.getFieldNames()[pos];
                        }
                        int p = DatasetUtil.getPositionOfPartitioningKeyField(dataset, fldName);
                        if (p < 0) {
                            // not one of the partitioning fields
                            setAsFinal(access, context, finalAnnot);
                            return false;
                        }
                        LogicalVariable keyVar = scan.getVariables().get(p);
                        access.getExpressions().get(0).setValue(new VariableReferenceExpression(keyVar));
                        return true;
                    }
                }
            }
        }
        setAsFinal(access, context, finalAnnot);
        return false;
    }
}

Example 15 with ILogicalExpression

use of org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression in project asterixdb by apache.

the class AccessMethodJobGenParams method writeVarList.

protected void writeVarList(List<LogicalVariable> varList, List<Mutable<ILogicalExpression>> funcArgs) {
    Mutable<ILogicalExpression> numKeysRef = new MutableObject<>(new ConstantExpression(new AsterixConstantValue(new AInt32(varList.size()))));
    funcArgs.add(numKeysRef);
    for (LogicalVariable keyVar : varList) {
        Mutable<ILogicalExpression> keyVarRef = new MutableObject<>(new VariableReferenceExpression(keyVar));
        funcArgs.add(keyVarRef);
    }
}