Examples with NestedTupleSourceOperator org.apache.hyracks.algebricks.core.algebra.operators.logical.NestedTupleSourceOperator used on opensource projects

Example 11 with NestedTupleSourceOperator

use of org.apache.hyracks.algebricks.core.algebra.operators.logical.NestedTupleSourceOperator in project asterixdb by apache.

the class ListifyUnnestingFunctionRule method listifyUnnestingFunction.

// Performs the actual logical transformation.
private boolean listifyUnnestingFunction(ILogicalOperator op, Mutable<ILogicalExpression> exprRef, AbstractFunctionCallExpression func, IOptimizationContext context) throws AlgebricksException {
    IFunctionInfo functionInfo = func.getFunctionInfo();
    // Checks if the function is an unnesting function.
    if (!BuiltinFunctions.isBuiltinUnnestingFunction(functionInfo.getFunctionIdentifier())) {
        return false;
    }
    // Generates the listified collection in a subplan.
    SubplanOperator subplanOperator = new SubplanOperator();
    // Creates a nested tuple source operator.
    NestedTupleSourceOperator ntsOperator = new NestedTupleSourceOperator(new MutableObject<>(subplanOperator));
    // Unnests the dataset.
    LogicalVariable unnestVar = context.newVar();
    ILogicalExpression unnestExpr = new UnnestingFunctionCallExpression(functionInfo, func.getArguments());
    UnnestOperator unnestOperator = new UnnestOperator(unnestVar, new MutableObject<>(unnestExpr));
    unnestOperator.getInputs().add(new MutableObject<>(ntsOperator));
    // Listify the dataset into one collection.
    LogicalVariable aggVar = context.newVar();
    Mutable<ILogicalExpression> aggArgExprRef = new MutableObject<>(new VariableReferenceExpression(unnestVar));
    ILogicalExpression aggExpr = new AggregateFunctionCallExpression(FunctionUtil.getFunctionInfo(BuiltinFunctions.LISTIFY), false, new ArrayList<>(Collections.singletonList(aggArgExprRef)));
    AggregateOperator aggregateOperator = new AggregateOperator(new ArrayList<>(Collections.singletonList(aggVar)), new ArrayList<>(Collections.singletonList(new MutableObject<>(aggExpr))));
    aggregateOperator.getInputs().add(new MutableObject<>(unnestOperator));
    // Adds the aggregate operator as the root of the subplan.
    subplanOperator.setRootOp(new MutableObject<>(aggregateOperator));
    // Sticks a subplan operator into the query plan.
    // Note: given the way we compile JOINs, the unnesting function expression cannot appear in
    // any binary operators.
    // Example test queries:
    // asterixdb/asterix-app/src/test/resources/runtimets/results/list/query-ASTERIXDB-159-2
    // asterixdb/asterix-app/src/test/resources/runtimets/results/list/query-ASTERIXDB-159-3
    subplanOperator.getInputs().add(op.getInputs().get(0));
    op.getInputs().set(0, new MutableObject<>(subplanOperator));
    exprRef.setValue(new VariableReferenceExpression(aggVar));
    // Computes type environments for new operators.
    context.computeAndSetTypeEnvironmentForOperator(ntsOperator);
    context.computeAndSetTypeEnvironmentForOperator(unnestOperator);
    context.computeAndSetTypeEnvironmentForOperator(aggregateOperator);
    context.computeAndSetTypeEnvironmentForOperator(subplanOperator);
    return true;
}

Example 12 with NestedTupleSourceOperator

use of org.apache.hyracks.algebricks.core.algebra.operators.logical.NestedTupleSourceOperator in project asterixdb by apache.

the class LoadRecordFieldsRule method findFieldExpression.

// Finds a field expression.
private static ILogicalExpression findFieldExpression(AbstractLogicalOperator op, LogicalVariable recordVar, Object accessKey, IVariableTypeEnvironment typeEnvironment, FieldResolver resolver) throws AlgebricksException {
    for (Mutable<ILogicalOperator> child : op.getInputs()) {
        AbstractLogicalOperator opChild = (AbstractLogicalOperator) child.getValue();
        if (opChild.getOperatorTag() == LogicalOperatorTag.ASSIGN) {
            AssignOperator op2 = (AssignOperator) opChild;
            int i = op2.getVariables().indexOf(recordVar);
            if (i >= 0) {
                AbstractLogicalExpression constr = (AbstractLogicalExpression) op2.getExpressions().get(i).getValue();
                return resolveFieldExpression(constr, accessKey, typeEnvironment, resolver);
            }
        } else if (opChild.getOperatorTag() == LogicalOperatorTag.NESTEDTUPLESOURCE) {
            NestedTupleSourceOperator nts = (NestedTupleSourceOperator) opChild;
            AbstractLogicalOperator opBelowNestedPlan = (AbstractLogicalOperator) nts.getDataSourceReference().getValue().getInputs().get(0).getValue();
            ILogicalExpression expr1 = findFieldExpression(opBelowNestedPlan, recordVar, accessKey, typeEnvironment, resolver);
            if (expr1 != null) {
                return expr1;
            }
        }
        ILogicalExpression expr2 = findFieldExpression(opChild, recordVar, accessKey, typeEnvironment, resolver);
        if (expr2 != null) {
            return expr2;
        }
    }
    return null;
}

Example 13 with NestedTupleSourceOperator

use of org.apache.hyracks.algebricks.core.algebra.operators.logical.NestedTupleSourceOperator in project asterixdb by apache.

the class InlineSubplanInputForNestedTupleSourceRule method applySpecialFlattening.

private Pair<Boolean, LinkedHashMap<LogicalVariable, LogicalVariable>> applySpecialFlattening(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
    SubplanOperator subplanOp = (SubplanOperator) opRef.getValue();
    Mutable<ILogicalOperator> inputOpRef = subplanOp.getInputs().get(0);
    LinkedHashMap<LogicalVariable, LogicalVariable> replacedVarMap = new LinkedHashMap<>();
    // Recursively applies this rule to the nested plan of the subplan operator,
    // for the case where there are nested subplan operators within {@code subplanOp}.
    Pair<Boolean, LinkedHashMap<LogicalVariable, LogicalVariable>> result = rewriteSubplanOperator(subplanOp.getNestedPlans().get(0).getRoots().get(0), context);
    ILogicalOperator inputOpBackup = inputOpRef.getValue();
    // Gets live variables and covering variables from the subplan's input operator.
    Pair<ILogicalOperator, Set<LogicalVariable>> primaryOpAndVars = EquivalenceClassUtils.findOrCreatePrimaryKeyOpAndVariables(inputOpBackup, false, context);
    ILogicalOperator inputOp = primaryOpAndVars.first;
    Set<LogicalVariable> primaryKeyVars = primaryOpAndVars.second;
    inputOpRef.setValue(inputOp);
    Set<LogicalVariable> liveVars = new HashSet<>();
    VariableUtilities.getLiveVariables(inputOp, liveVars);
    Pair<Set<LogicalVariable>, Mutable<ILogicalOperator>> notNullVarsAndTopJoinRef = SubplanFlatteningUtil.inlineLeftNtsInSubplanJoin(subplanOp, context);
    if (notNullVarsAndTopJoinRef.first == null) {
        inputOpRef.setValue(inputOpBackup);
        return new Pair<>(false, replacedVarMap);
    }
    Set<LogicalVariable> notNullVars = notNullVarsAndTopJoinRef.first;
    Mutable<ILogicalOperator> topJoinRef = notNullVarsAndTopJoinRef.second;
    // Creates a group-by operator.
    List<Pair<LogicalVariable, Mutable<ILogicalExpression>>> groupByList = new ArrayList<Pair<LogicalVariable, Mutable<ILogicalExpression>>>();
    List<Pair<LogicalVariable, Mutable<ILogicalExpression>>> groupByDecorList = new ArrayList<Pair<LogicalVariable, Mutable<ILogicalExpression>>>();
    GroupByOperator groupbyOp = new GroupByOperator(groupByList, groupByDecorList, subplanOp.getNestedPlans());
    for (LogicalVariable coverVar : primaryKeyVars) {
        LogicalVariable newVar = context.newVar();
        groupByList.add(new Pair<>(newVar, new MutableObject<>(new VariableReferenceExpression(coverVar))));
        // Adds variables for replacements in ancestors.
        replacedVarMap.put(coverVar, newVar);
    }
    for (LogicalVariable liveVar : liveVars) {
        if (primaryKeyVars.contains(liveVar)) {
            continue;
        }
        groupByDecorList.add(new Pair<>(null, new MutableObject<>(new VariableReferenceExpression(liveVar))));
    }
    groupbyOp.getInputs().add(new MutableObject<>(topJoinRef.getValue()));
    if (!notNullVars.isEmpty()) {
        // Adds a select operator into the nested plan for group-by to remove tuples with NULL on {@code assignVar}, i.e.,
        // subplan input tuples that are filtered out within a subplan.
        List<Mutable<ILogicalExpression>> nullCheckExprRefs = new ArrayList<>();
        for (LogicalVariable notNullVar : notNullVars) {
            Mutable<ILogicalExpression> filterVarExpr = new MutableObject<>(new VariableReferenceExpression(notNullVar));
            List<Mutable<ILogicalExpression>> args = new ArrayList<>();
            args.add(filterVarExpr);
            List<Mutable<ILogicalExpression>> argsForNotFunction = new ArrayList<>();
            argsForNotFunction.add(new MutableObject<>(new ScalarFunctionCallExpression(FunctionUtil.getFunctionInfo(BuiltinFunctions.IS_MISSING), args)));
            nullCheckExprRefs.add(new MutableObject<>(new ScalarFunctionCallExpression(FunctionUtil.getFunctionInfo(BuiltinFunctions.NOT), argsForNotFunction)));
        }
        Mutable<ILogicalExpression> selectExprRef = nullCheckExprRefs.size() > 1 ? new MutableObject<>(new ScalarFunctionCallExpression(FunctionUtil.getFunctionInfo(BuiltinFunctions.AND), nullCheckExprRefs)) : nullCheckExprRefs.get(0);
        SelectOperator selectOp = new SelectOperator(selectExprRef, false, null);
        topJoinRef.setValue(selectOp);
        selectOp.getInputs().add(new MutableObject<>(new NestedTupleSourceOperator(new MutableObject<>(groupbyOp))));
    } else {
        // The original join operator in the Subplan is a left-outer join.
        // Therefore, no null-check variable is injected and no SelectOperator needs to be added.
        topJoinRef.setValue(new NestedTupleSourceOperator(new MutableObject<>(groupbyOp)));
    }
    opRef.setValue(groupbyOp);
    OperatorManipulationUtil.computeTypeEnvironmentBottomUp(groupbyOp, context);
    VariableUtilities.substituteVariables(groupbyOp, result.second, context);
    replacedVarMap.putAll(result.second);
    return new Pair<>(true, replacedVarMap);
}

Example 14 with NestedTupleSourceOperator

use of org.apache.hyracks.algebricks.core.algebra.operators.logical.NestedTupleSourceOperator in project asterixdb by apache.

the class InlineSubplanInputForNestedTupleSourceRule method applyGeneralFlattening.

private Pair<Boolean, LinkedHashMap<LogicalVariable, LogicalVariable>> applyGeneralFlattening(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
    SubplanOperator subplanOp = (SubplanOperator) opRef.getValue();
    if (!SubplanFlatteningUtil.containsOperators(subplanOp, ImmutableSet.of(LogicalOperatorTag.DATASOURCESCAN, LogicalOperatorTag.INNERJOIN, // We don't have nested runtime for union-all and distinct hence we have to include them here.
    LogicalOperatorTag.LEFTOUTERJOIN, LogicalOperatorTag.UNIONALL, LogicalOperatorTag.DISTINCT))) {
        return new Pair<>(false, new LinkedHashMap<>());
    }
    Mutable<ILogicalOperator> inputOpRef = subplanOp.getInputs().get(0);
    ILogicalOperator inputOpBackup = inputOpRef.getValue();
    // Creates parameters for the left outer join operator.
    Pair<ILogicalOperator, Set<LogicalVariable>> primaryOpAndVars = EquivalenceClassUtils.findOrCreatePrimaryKeyOpAndVariables(inputOpBackup, true, context);
    ILogicalOperator inputOp = primaryOpAndVars.first;
    Set<LogicalVariable> primaryKeyVars = primaryOpAndVars.second;
    inputOpRef.setValue(inputOp);
    Set<LogicalVariable> inputLiveVars = new HashSet<>();
    VariableUtilities.getLiveVariables(inputOp, inputLiveVars);
    Pair<Map<LogicalVariable, LogicalVariable>, List<Pair<IOrder, Mutable<ILogicalExpression>>>> varMapAndOrderExprs = SubplanFlatteningUtil.inlineAllNestedTupleSource(subplanOp, context);
    Map<LogicalVariable, LogicalVariable> varMap = varMapAndOrderExprs.first;
    if (varMap == null) {
        inputOpRef.setValue(inputOpBackup);
        return new Pair<>(false, new LinkedHashMap<>());
    }
    Mutable<ILogicalOperator> lowestAggregateRefInSubplan = SubplanFlatteningUtil.findLowestAggregate(subplanOp.getNestedPlans().get(0).getRoots().get(0));
    Mutable<ILogicalOperator> rightInputOpRef = lowestAggregateRefInSubplan.getValue().getInputs().get(0);
    ILogicalOperator rightInputOp = rightInputOpRef.getValue();
    // Creates a variable to indicate whether a left input tuple is killed in the plan rooted at rightInputOp.
    LogicalVariable assignVar = context.newVar();
    ILogicalOperator assignOp = new AssignOperator(assignVar, new MutableObject<>(ConstantExpression.TRUE));
    assignOp.getInputs().add(rightInputOpRef);
    context.computeAndSetTypeEnvironmentForOperator(assignOp);
    rightInputOpRef = new MutableObject<>(assignOp);
    // Constructs the join predicate for the leftOuter join.
    List<Mutable<ILogicalExpression>> joinPredicates = new ArrayList<>();
    for (LogicalVariable liveVar : primaryKeyVars) {
        List<Mutable<ILogicalExpression>> arguments = new ArrayList<>();
        arguments.add(new MutableObject<>(new VariableReferenceExpression(liveVar)));
        LogicalVariable rightVar = varMap.get(liveVar);
        arguments.add(new MutableObject<>(new VariableReferenceExpression(rightVar)));
        ILogicalExpression expr = new ScalarFunctionCallExpression(FunctionUtil.getFunctionInfo(AlgebricksBuiltinFunctions.EQ), arguments);
        joinPredicates.add(new MutableObject<>(expr));
    }
    ILogicalExpression joinExpr = joinPredicates.size() > 1 ? new ScalarFunctionCallExpression(FunctionUtil.getFunctionInfo(AlgebricksBuiltinFunctions.AND), joinPredicates) : joinPredicates.size() > 0 ? joinPredicates.get(0).getValue() : ConstantExpression.TRUE;
    LeftOuterJoinOperator leftOuterJoinOp = new LeftOuterJoinOperator(new MutableObject<>(joinExpr), inputOpRef, rightInputOpRef);
    OperatorManipulationUtil.computeTypeEnvironmentBottomUp(rightInputOp, context);
    context.computeAndSetTypeEnvironmentForOperator(leftOuterJoinOp);
    // Creates group-by operator.
    List<Pair<LogicalVariable, Mutable<ILogicalExpression>>> groupByList = new ArrayList<Pair<LogicalVariable, Mutable<ILogicalExpression>>>();
    List<Pair<LogicalVariable, Mutable<ILogicalExpression>>> groupByDecorList = new ArrayList<Pair<LogicalVariable, Mutable<ILogicalExpression>>>();
    List<ILogicalPlan> nestedPlans = new ArrayList<>();
    GroupByOperator groupbyOp = new GroupByOperator(groupByList, groupByDecorList, nestedPlans);
    LinkedHashMap<LogicalVariable, LogicalVariable> replacedVarMap = new LinkedHashMap<>();
    for (LogicalVariable liveVar : primaryKeyVars) {
        LogicalVariable newVar = context.newVar();
        groupByList.add(new Pair<>(newVar, new MutableObject<>(new VariableReferenceExpression(liveVar))));
        // Adds variables for replacements in ancestors.
        replacedVarMap.put(liveVar, newVar);
    }
    for (LogicalVariable liveVar : inputLiveVars) {
        if (primaryKeyVars.contains(liveVar)) {
            continue;
        }
        groupByDecorList.add(new Pair<>(null, new MutableObject<>(new VariableReferenceExpression(liveVar))));
    }
    // Sets up the nested plan for the groupby operator.
    Mutable<ILogicalOperator> aggOpRef = subplanOp.getNestedPlans().get(0).getRoots().get(0);
    // Clears the input of the lowest aggregate.
    lowestAggregateRefInSubplan.getValue().getInputs().clear();
    Mutable<ILogicalOperator> currentOpRef = lowestAggregateRefInSubplan;
    // Adds an optional order operator.
    List<Pair<IOrder, Mutable<ILogicalExpression>>> orderExprs = varMapAndOrderExprs.second;
    if (!orderExprs.isEmpty()) {
        OrderOperator orderOp = new OrderOperator(orderExprs);
        currentOpRef = new MutableObject<>(orderOp);
        lowestAggregateRefInSubplan.getValue().getInputs().add(currentOpRef);
    }
    // Adds a select operator into the nested plan for group-by to remove tuples with NULL on {@code assignVar}, i.e.,
    // subplan input tuples that are filtered out within a subplan.
    Mutable<ILogicalExpression> filterVarExpr = new MutableObject<>(new VariableReferenceExpression(assignVar));
    List<Mutable<ILogicalExpression>> args = new ArrayList<>();
    args.add(filterVarExpr);
    List<Mutable<ILogicalExpression>> argsForNotFunction = new ArrayList<>();
    argsForNotFunction.add(new MutableObject<>(new ScalarFunctionCallExpression(FunctionUtil.getFunctionInfo(BuiltinFunctions.IS_MISSING), args)));
    SelectOperator selectOp = new SelectOperator(new MutableObject<>(new ScalarFunctionCallExpression(FunctionUtil.getFunctionInfo(BuiltinFunctions.NOT), argsForNotFunction)), false, null);
    currentOpRef.getValue().getInputs().add(new MutableObject<>(selectOp));
    selectOp.getInputs().add(new MutableObject<>(new NestedTupleSourceOperator(new MutableObject<>(groupbyOp))));
    List<Mutable<ILogicalOperator>> nestedRoots = new ArrayList<>();
    nestedRoots.add(aggOpRef);
    nestedPlans.add(new ALogicalPlanImpl(nestedRoots));
    groupbyOp.getInputs().add(new MutableObject<>(leftOuterJoinOp));
    // Replaces subplan with the group-by operator.
    opRef.setValue(groupbyOp);
    OperatorManipulationUtil.computeTypeEnvironmentBottomUp(groupbyOp, context);
    // Recursively applys this rule to the nested plan of the subplan operator,
    // for the case where there are nested subplan operators within {@code subplanOp}.
    Pair<Boolean, LinkedHashMap<LogicalVariable, LogicalVariable>> result = rewriteSubplanOperator(rightInputOpRef, context);
    VariableUtilities.substituteVariables(leftOuterJoinOp, result.second, context);
    VariableUtilities.substituteVariables(groupbyOp, result.second, context);
    // No var mapping from the right input operator should be populated up.
    return new Pair<>(true, replacedVarMap);
}

Example 15 with NestedTupleSourceOperator

use of org.apache.hyracks.algebricks.core.algebra.operators.logical.NestedTupleSourceOperator in project asterixdb by apache.

the class LangExpressionToPlanTranslator method langExprToAlgExpression.

protected Pair<ILogicalExpression, Mutable<ILogicalOperator>> langExprToAlgExpression(Expression expr, Mutable<ILogicalOperator> topOpRef) throws CompilationException {
    switch(expr.getKind()) {
        case VARIABLE_EXPRESSION:
            VariableReferenceExpression ve = new VariableReferenceExpression(context.getVar(((VariableExpr) expr).getVar().getId()));
            return new Pair<>(ve, topOpRef);
        case LITERAL_EXPRESSION:
            LiteralExpr val = (LiteralExpr) expr;
            return new Pair<>(new ConstantExpression(new AsterixConstantValue(ConstantHelper.objectFromLiteral(val.getValue()))), topOpRef);
        default:
            if (expressionNeedsNoNesting(expr)) {
                Pair<ILogicalOperator, LogicalVariable> p = expr.accept(this, topOpRef);
                ILogicalExpression exp = ((AssignOperator) p.first).getExpressions().get(0).getValue();
                return new Pair<>(exp, p.first.getInputs().get(0));
            } else {
                Mutable<ILogicalOperator> srcRef = new MutableObject<>();
                Pair<ILogicalOperator, LogicalVariable> p = expr.accept(this, srcRef);
                if (p.first.getOperatorTag() == LogicalOperatorTag.SUBPLAN) {
                    if (topOpRef.getValue() != null) {
                        srcRef.setValue(topOpRef.getValue());
                    } else {
                        // Re-binds the bottom operator reference to {@code topOpRef}.
                        rebindBottomOpRef(p.first, srcRef, topOpRef);
                    }
                    Mutable<ILogicalOperator> top2 = new MutableObject<>(p.first);
                    return new Pair<>(new VariableReferenceExpression(p.second), top2);
                } else {
                    SubplanOperator s = new SubplanOperator();
                    s.getInputs().add(topOpRef);
                    srcRef.setValue(new NestedTupleSourceOperator(new MutableObject<>(s)));
                    Mutable<ILogicalOperator> planRoot = new MutableObject<>(p.first);
                    s.setRootOp(planRoot);
                    return new Pair<>(new VariableReferenceExpression(p.second), new MutableObject<>(s));
                }
            }
    }
}