Examples of UnnestOperator

Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator

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                            vxqueryContext);
                }
                break;
            case UNNEST:
                // Get unnest item property.
                UnnestOperator unnest = (UnnestOperator) op;
                ILogicalExpression unnestLogicalExpression = (ILogicalExpression) unnest.getExpressionRef().getValue();
                variableId = unnest.getVariables().get(0).getId();
                Cardinality inputCardinality = vxqueryContext.getCardinalityOperatorMap(op.getInputs().get(0)
                        .getValue());
                documentOrder = propagateDocumentOrder(unnestLogicalExpression, documentOrderVariablesForOperator);
                uniqueNodes = propagateUniqueNodes(unnestLogicalExpression, uniqueNodesVariablesForOperator);

                // Reset properties based on unnest duplication.
                resetDocumentOrderVariables(documentOrderVariables, DocumentOrder.NO);
                resetUniqueNodesVariables(uniqueNodesVariables, UniqueNodes.NO);
                if (inputCardinality == Cardinality.ONE) {
                    documentOrderVariables.put(variableId, documentOrder);
                    uniqueNodesVariables.put(variableId, uniqueNodes);
                } else {
                    documentOrderVariables.put(variableId, DocumentOrder.NO);
                    uniqueNodesVariables.put(variableId, UniqueNodes.NO);
                }

                // Add position variable property.
                if (unnest.getPositionalVariable() != null) {
                    variableId = unnest.getPositionalVariable().getId();
                    if (inputCardinality == Cardinality.ONE) {
                        documentOrderVariables.put(variableId, DocumentOrder.YES);
                        uniqueNodesVariables.put(variableId, UniqueNodes.YES);
                    } else {
                        documentOrderVariables.put(variableId, DocumentOrder.NO);
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator

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    public boolean rewritePre(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
        AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
        if (op.getOperatorTag() != LogicalOperatorTag.UNNEST) {
            return false;
        }
        UnnestOperator unnest = (UnnestOperator) op;

        // Check to see if the expression is the iterate operator.
        ILogicalExpression logicalExpression = (ILogicalExpression) unnest.getExpressionRef().getValue();
        if (logicalExpression.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
            return false;
        }
        AbstractFunctionCallExpression functionCall = (AbstractFunctionCallExpression) logicalExpression;
        if (!functionCall.getFunctionIdentifier().equals(BuiltinOperators.ITERATE.getFunctionIdentifier())) {
            return false;
        }

        AbstractLogicalOperator op2 = (AbstractLogicalOperator) unnest.getInputs().get(0).getValue();
        if (op2.getOperatorTag() != LogicalOperatorTag.AGGREGATE) {
            return false;
        }
        AggregateOperator aggregate = (AggregateOperator) op2;

        // Check to see if the expression is a function and op:sequence.
        ILogicalExpression logicalExpression2 = (ILogicalExpression) aggregate.getExpressions().get(0).getValue();
        if (logicalExpression2.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
            return false;
        }
        AbstractFunctionCallExpression functionCall2 = (AbstractFunctionCallExpression) logicalExpression2;
        if (!functionCall2.getFunctionIdentifier().equals(BuiltinOperators.SEQUENCE.getFunctionIdentifier())) {
            return false;
        }

        // Replace search string with assign.
        Mutable<ILogicalExpression> assignExpression = functionCall2.getArguments().get(0);
        LogicalVariable assignVariable = context.newVar();
        AssignOperator aOp = new AssignOperator(assignVariable, assignExpression);
        for (Mutable<ILogicalOperator> input : aggregate.getInputs()) {
            aOp.getInputs().add(input);
        }
        functionCall.getArguments().get(0).setValue(new VariableReferenceExpression(assignVariable));
        unnest.getInputs().get(0).setValue(aOp);

        return true;
    }
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator

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                AbstractLogicalOperator variableOp = (AbstractLogicalOperator) variableProducer.getValue();
                switch (variableOp.getOperatorTag()) {
                    case DATASOURCESCAN:
                        return SequenceType.create(AnyNodeType.INSTANCE, Quantifier.QUANT_ONE);
                    case UNNEST:
                        UnnestOperator unnest = (UnnestOperator) variableOp;
                        return getOutputSequenceType(variableProducer, unnest.getExpressionRef(), dCtx);
                    default:
                        // TODO Consider support for other operators. i.e. Assign.
                        break;
                }
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator

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        VariableReferenceExpression inputVariableRef = (VariableReferenceExpression) mutableVariableExpresion.getValue();
        LogicalVariable inputVariable = inputVariableRef.getVariableReference();

        // Unnest.
        LogicalVariable unnestVariable = context.newVar();
        UnnestOperator unnestOperator = getUnnestOperator(inputVariable, unnestVariable);
        unnestOperator.getInputs().add(nextOperatorRef);
        nextOperatorRef = new MutableObject<ILogicalOperator>(unnestOperator);

        // Aggregate.
        VariableReferenceExpression inputArg = new VariableReferenceExpression(unnestVariable);
        finalFunctionCall.getArguments().get(0).setValue(inputArg);
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator

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        iterateArgs.add(new MutableObject<ILogicalExpression>(inputVre));

        ILogicalExpression unnestExp = new UnnestingFunctionCallExpression(BuiltinOperators.ITERATE, iterateArgs);
        Mutable<ILogicalExpression> unnestExpRef = new MutableObject<ILogicalExpression>(unnestExp);

        return new UnnestOperator(unnestVariable, unnestExpRef);
    }
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator

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                .getValue();
        LogicalVariable inputVariable = inputVariableRef.getVariableReference();

        // Unnest.
        LogicalVariable unnestVariable = context.newVar();
        UnnestOperator unnestOperator = getUnnestOperator(inputVariable, unnestVariable);
        unnestOperator.getInputs().add(nextOperatorRef);
        nextOperatorRef = new MutableObject<ILogicalOperator>(unnestOperator);

        // Assign Node ID key.
        LogicalVariable nodeIdKeyVariable = context.newVar();
        AssignOperator nodeIdAssignOp = getAssignOperator(unnestVariable, nodeIdKeyVariable,
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator

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        iterateArgs.add(new MutableObject<ILogicalExpression>(inputVre));

        ILogicalExpression unnestExp = new UnnestingFunctionCallExpression(BuiltinOperators.ITERATE, iterateArgs);
        Mutable<ILogicalExpression> unnestExpRef = new MutableObject<ILogicalExpression>(unnestExp);

        return new UnnestOperator(unnestVariable, unnestExpRef);
    }
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator

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            case AGGREGATE:
                AbstractAssignOperator assign = (AbstractAssignOperator) op;
                variableId = assign.getVariables().get(0).getId();
                break;
            case UNNEST:
                UnnestOperator unnest = (UnnestOperator) op;
                variableId = unnest.getVariable().getId();
                break;
            default:
                return false;
        }
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator

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            if (ds != null) {
                ds.setTotalDataSources(vxqueryContext.getTotalDataSources());

                // Known to be true because of collection name.
                AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
                UnnestOperator unnest = (UnnestOperator) op;
                AbstractLogicalOperator op2 = (AbstractLogicalOperator) unnest.getInputs().get(0).getValue();
                AssignOperator assign = (AssignOperator) op2;

                DataSourceScanOperator opNew = new DataSourceScanOperator(unnest.getVariables(), ds);
                opNew.getInputs().addAll(assign.getInputs());
                opRef.setValue(opNew);
                return true;
            }
        }
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator

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        // UNNEST($v1, iterate($v0) )
        AbstractLogicalOperator subplanOp2 = (AbstractLogicalOperator) subplanOp1.getInputs().get(0).getValue();
        if (subplanOp2.getOperatorTag() != LogicalOperatorTag.UNNEST) {
            return false;
        }
        UnnestOperator subplanUnnest = (UnnestOperator) subplanOp2;

        // Check to see if the expression is the iterate operator.
        ILogicalExpression logicalExpression2 = (ILogicalExpression) subplanUnnest.getExpressionRef().getValue();
        if (logicalExpression2.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
            return false;
        }
        AbstractFunctionCallExpression functionCall2 = (AbstractFunctionCallExpression) logicalExpression2;
        if (!functionCall2.getFunctionIdentifier().equals(BuiltinOperators.ITERATE.getFunctionIdentifier())) {
            return false;
        }

        if (subplanUnnest.getVariable() != vre1.getVariableReference()) {
            return false;
        }
        Mutable<ILogicalExpression> lvm2 = ExpressionToolbox.findVariableExpression(subplanUnnest.getExpressionRef());
        if (lvm2 == null) {
            return false;
        }
        VariableReferenceExpression vre2 = (VariableReferenceExpression) lvm2.getValue();
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