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

Example 6 with NestedTupleSourceOperator

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

the class IsomorphismVariableMappingVisitor method visitNestedTupleSourceOperator.

@Override
public Void visitNestedTupleSourceOperator(NestedTupleSourceOperator op, ILogicalOperator arg) throws AlgebricksException {
    ILogicalOperator inputToCreator1 = op.getSourceOperator();
    NestedTupleSourceOperator nts = (NestedTupleSourceOperator) arg;
    ILogicalOperator inputToCreator2 = nts.getSourceOperator();
    inputToCreator1.accept(this, inputToCreator2);
    return null;
}

Example 7 with NestedTupleSourceOperator

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

the class InlineAllNtsInSubplanVisitor method wrapLimitInGroupBy.

private Pair<ILogicalOperator, LogicalVariable> wrapLimitInGroupBy(ILogicalOperator op, LogicalVariable recordVar, Set<LogicalVariable> inputLiveVars) throws AlgebricksException {
    GroupByOperator gbyOp = new GroupByOperator();
    List<Pair<LogicalVariable, LogicalVariable>> keyVarNewVarPairs = new ArrayList<>();
    for (LogicalVariable keyVar : correlatedKeyVars) {
        // This limits the visitor can only be applied to a nested logical
        // plan inside a Subplan operator,
        // where the keyVarsToEnforce forms a candidate key which can
        // uniquely identify a tuple out of the nested-tuple-source.
        LogicalVariable newVar = context.newVar();
        gbyOp.getGroupByList().add(new Pair<>(newVar, new MutableObject<>(new VariableReferenceExpression(keyVar))));
        keyVarNewVarPairs.add(new Pair<>(keyVar, newVar));
    }
    // Creates an aggregate operator doing LISTIFY, as the root of the
    // nested plan of the added group-by operator.
    List<LogicalVariable> aggVarList = new ArrayList<LogicalVariable>();
    List<Mutable<ILogicalExpression>> aggExprList = new ArrayList<Mutable<ILogicalExpression>>();
    LogicalVariable aggVar = context.newVar();
    List<Mutable<ILogicalExpression>> aggArgList = new ArrayList<>();
    aggVarList.add(aggVar);
    // Creates an aggregation function expression.
    aggArgList.add(new MutableObject<>(new VariableReferenceExpression(recordVar)));
    ILogicalExpression aggExpr = new AggregateFunctionCallExpression(FunctionUtil.getFunctionInfo(BuiltinFunctions.LISTIFY), false, aggArgList);
    aggExprList.add(new MutableObject<>(aggExpr));
    AggregateOperator aggOp = new AggregateOperator(aggVarList, aggExprList);
    // Adds the original limit operator as the input operator to the added
    // aggregate operator.
    aggOp.getInputs().add(new MutableObject<>(op));
    op.getInputs().clear();
    ILogicalOperator currentOp = op;
    if (!orderingExprs.isEmpty()) {
        OrderOperator orderOp = new OrderOperator(cloneOrderingExpression(orderingExprs));
        op.getInputs().add(new MutableObject<>(orderOp));
        currentOp = orderOp;
    }
    // Adds a nested tuple source operator as the input operator to the
    // limit operator.
    NestedTupleSourceOperator nts = new NestedTupleSourceOperator(new MutableObject<ILogicalOperator>(gbyOp));
    currentOp.getInputs().add(new MutableObject<>(nts));
    // Sets the root of the added nested plan to the aggregate operator.
    ILogicalPlan nestedPlan = new ALogicalPlanImpl();
    nestedPlan.getRoots().add(new MutableObject<>(aggOp));
    // Sets the nested plan for the added group-by operator.
    gbyOp.getNestedPlans().add(nestedPlan);
    // Updates variable mapping for ancestor operators.
    for (Pair<LogicalVariable, LogicalVariable> keyVarNewVar : keyVarNewVarPairs) {
        updateInputToOutputVarMapping(keyVarNewVar.first, keyVarNewVar.second, false);
    }
    return new Pair<>(gbyOp, aggVar);
}

Example 8 with NestedTupleSourceOperator

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

the class InlineAllNtsInSubplanVisitor method visitAggregateOperator.

/**
     * Wraps an AggregateOperator or RunningAggregateOperator with a group-by
     * operator where the group-by keys are variables in keyVarsToEnforce. Note
     * that the function here prevents this visitor being used to rewrite
     * arbitrary query plans. Instead, it could only be used for rewriting a
     * nested plan within a subplan operator.
     *
     * @param op
     *            the logical operator for aggregate or running aggregate.
     * @return the wrapped group-by operator if {@code keyVarsToEnforce} is not
     *         empty, and {@code op} otherwise.
     * @throws AlgebricksException
     */
private ILogicalOperator visitAggregateOperator(ILogicalOperator op) throws AlgebricksException {
    visitSingleInputOperator(op);
    if (correlatedKeyVars.isEmpty()) {
        return op;
    }
    GroupByOperator gbyOp = new GroupByOperator();
    // Creates a copy of correlatedKeyVars, to fix the ConcurrentModificationExcetpion in ASTERIXDB-1581.
    List<LogicalVariable> copyOfCorrelatedKeyVars = new ArrayList<>(correlatedKeyVars);
    for (LogicalVariable keyVar : copyOfCorrelatedKeyVars) {
        // This limits the visitor can only be applied to a nested logical
        // plan inside a Subplan operator,
        // where the keyVarsToEnforce forms a candidate key which can
        // uniquely identify a tuple out of the nested-tuple-source.
        LogicalVariable newVar = context.newVar();
        gbyOp.getGroupByList().add(new Pair<>(newVar, new MutableObject<>(new VariableReferenceExpression(keyVar))));
        updateInputToOutputVarMapping(keyVar, newVar, false);
    }
    ILogicalOperator inputOp = op.getInputs().get(0).getValue();
    gbyOp.getInputs().add(new MutableObject<>(inputOp));
    NestedTupleSourceOperator nts = new NestedTupleSourceOperator(new MutableObject<ILogicalOperator>(gbyOp));
    op.getInputs().clear();
    op.getInputs().add(new MutableObject<>(nts));
    ILogicalPlan nestedPlan = new ALogicalPlanImpl();
    nestedPlan.getRoots().add(new MutableObject<>(op));
    gbyOp.getNestedPlans().add(nestedPlan);
    OperatorManipulationUtil.computeTypeEnvironmentBottomUp(gbyOp, context);
    return op;
}

Example 9 with NestedTupleSourceOperator

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

the class IntroduceGroupByForSubplanRule method rewritePost.

@Override
public boolean rewritePost(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
    AbstractLogicalOperator op0 = (AbstractLogicalOperator) opRef.getValue();
    if (op0.getOperatorTag() != LogicalOperatorTag.SUBPLAN) {
        return false;
    }
    SubplanOperator subplan = (SubplanOperator) op0;
    Iterator<ILogicalPlan> plansIter = subplan.getNestedPlans().iterator();
    ILogicalPlan p = null;
    while (plansIter.hasNext()) {
        p = plansIter.next();
    }
    if (p == null) {
        return false;
    }
    if (p.getRoots().size() != 1) {
        return false;
    }
    Mutable<ILogicalOperator> subplanRoot = p.getRoots().get(0);
    AbstractLogicalOperator op1 = (AbstractLogicalOperator) subplanRoot.getValue();
    Mutable<ILogicalOperator> botRef = subplanRoot;
    AbstractLogicalOperator op2;
    // Project is optional
    if (op1.getOperatorTag() != LogicalOperatorTag.PROJECT) {
        op2 = op1;
    } else {
        ProjectOperator project = (ProjectOperator) op1;
        botRef = project.getInputs().get(0);
        op2 = (AbstractLogicalOperator) botRef.getValue();
    }
    if (op2.getOperatorTag() != LogicalOperatorTag.AGGREGATE) {
        return false;
    }
    AggregateOperator aggregate = (AggregateOperator) op2;
    Set<LogicalVariable> free = new HashSet<LogicalVariable>();
    VariableUtilities.getUsedVariables(aggregate, free);
    Mutable<ILogicalOperator> op3Ref = aggregate.getInputs().get(0);
    AbstractLogicalOperator op3 = (AbstractLogicalOperator) op3Ref.getValue();
    while (op3.getInputs().size() == 1) {
        Set<LogicalVariable> prod = new HashSet<LogicalVariable>();
        VariableUtilities.getProducedVariables(op3, prod);
        free.removeAll(prod);
        VariableUtilities.getUsedVariables(op3, free);
        botRef = op3Ref;
        op3Ref = op3.getInputs().get(0);
        op3 = (AbstractLogicalOperator) op3Ref.getValue();
    }
    if (op3.getOperatorTag() != LogicalOperatorTag.INNERJOIN && op3.getOperatorTag() != LogicalOperatorTag.LEFTOUTERJOIN) {
        return false;
    }
    AbstractBinaryJoinOperator join = (AbstractBinaryJoinOperator) op3;
    if (join.getCondition().getValue() == ConstantExpression.TRUE) {
        return false;
    }
    VariableUtilities.getUsedVariables(join, free);
    AbstractLogicalOperator b0 = (AbstractLogicalOperator) join.getInputs().get(0).getValue();
    // see if there's an NTS at the end of the pipeline
    NestedTupleSourceOperator outerNts = getNts(b0);
    if (outerNts == null) {
        AbstractLogicalOperator b1 = (AbstractLogicalOperator) join.getInputs().get(1).getValue();
        outerNts = getNts(b1);
        if (outerNts == null) {
            return false;
        }
    }
    Set<LogicalVariable> pkVars = computeGbyVars(outerNts, free, context);
    if (pkVars == null || pkVars.size() < 1) {
        // there is no non-trivial primary key, group-by keys are all live variables
        // that were produced by descendant or self
        ILogicalOperator subplanInput = subplan.getInputs().get(0).getValue();
        pkVars = new HashSet<LogicalVariable>();
        //get live variables
        VariableUtilities.getLiveVariables(subplanInput, pkVars);
        //get produced variables
        Set<LogicalVariable> producedVars = new HashSet<LogicalVariable>();
        VariableUtilities.getProducedVariablesInDescendantsAndSelf(subplanInput, producedVars);
        //retain the intersection
        pkVars.retainAll(producedVars);
    }
    AlgebricksConfig.ALGEBRICKS_LOGGER.fine("Found FD for introducing group-by: " + pkVars);
    Mutable<ILogicalOperator> rightRef = join.getInputs().get(1);
    LogicalVariable testForNull = null;
    AbstractLogicalOperator right = (AbstractLogicalOperator) rightRef.getValue();
    switch(right.getOperatorTag()) {
        case UNNEST:
            {
                UnnestOperator innerUnnest = (UnnestOperator) right;
                // Select [ $y != null ]
                testForNull = innerUnnest.getVariable();
                break;
            }
        case RUNNINGAGGREGATE:
            {
                ILogicalOperator inputToRunningAggregate = right.getInputs().get(0).getValue();
                Set<LogicalVariable> producedVars = new ListSet<LogicalVariable>();
                VariableUtilities.getProducedVariables(inputToRunningAggregate, producedVars);
                if (!producedVars.isEmpty()) {
                    // Select [ $y != null ]
                    testForNull = producedVars.iterator().next();
                }
                break;
            }
        case DATASOURCESCAN:
            {
                DataSourceScanOperator innerScan = (DataSourceScanOperator) right;
                // Select [ $y != null ]
                if (innerScan.getVariables().size() == 1) {
                    testForNull = innerScan.getVariables().get(0);
                }
                break;
            }
        default:
            break;
    }
    if (testForNull == null) {
        testForNull = context.newVar();
        AssignOperator tmpAsgn = new AssignOperator(testForNull, new MutableObject<ILogicalExpression>(ConstantExpression.TRUE));
        tmpAsgn.getInputs().add(new MutableObject<ILogicalOperator>(rightRef.getValue()));
        rightRef.setValue(tmpAsgn);
        context.computeAndSetTypeEnvironmentForOperator(tmpAsgn);
    }
    IFunctionInfo finfoEq = context.getMetadataProvider().lookupFunction(AlgebricksBuiltinFunctions.IS_MISSING);
    ILogicalExpression isNullTest = new ScalarFunctionCallExpression(finfoEq, new MutableObject<ILogicalExpression>(new VariableReferenceExpression(testForNull)));
    IFunctionInfo finfoNot = context.getMetadataProvider().lookupFunction(AlgebricksBuiltinFunctions.NOT);
    ScalarFunctionCallExpression nonNullTest = new ScalarFunctionCallExpression(finfoNot, new MutableObject<ILogicalExpression>(isNullTest));
    SelectOperator selectNonNull = new SelectOperator(new MutableObject<ILogicalExpression>(nonNullTest), false, null);
    GroupByOperator g = new GroupByOperator();
    Mutable<ILogicalOperator> newSubplanRef = new MutableObject<ILogicalOperator>(subplan);
    NestedTupleSourceOperator nts = new NestedTupleSourceOperator(new MutableObject<ILogicalOperator>(g));
    opRef.setValue(g);
    selectNonNull.getInputs().add(new MutableObject<ILogicalOperator>(nts));
    List<Mutable<ILogicalOperator>> prodInpList = botRef.getValue().getInputs();
    prodInpList.clear();
    prodInpList.add(new MutableObject<ILogicalOperator>(selectNonNull));
    ILogicalPlan gPlan = new ALogicalPlanImpl(new MutableObject<ILogicalOperator>(subplanRoot.getValue()));
    g.getNestedPlans().add(gPlan);
    subplanRoot.setValue(op3Ref.getValue());
    g.getInputs().add(newSubplanRef);
    HashSet<LogicalVariable> underVars = new HashSet<LogicalVariable>();
    VariableUtilities.getLiveVariables(subplan.getInputs().get(0).getValue(), underVars);
    underVars.removeAll(pkVars);
    Map<LogicalVariable, LogicalVariable> mappedVars = buildVarExprList(pkVars, context, g, g.getGroupByList());
    context.updatePrimaryKeys(mappedVars);
    for (LogicalVariable uv : underVars) {
        g.getDecorList().add(new Pair<LogicalVariable, Mutable<ILogicalExpression>>(null, new MutableObject<ILogicalExpression>(new VariableReferenceExpression(uv))));
    }
    OperatorPropertiesUtil.typeOpRec(subplanRoot, context);
    OperatorPropertiesUtil.typeOpRec(gPlan.getRoots().get(0), context);
    context.computeAndSetTypeEnvironmentForOperator(g);
    return true;
}

Example 10 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;
}