Examples of VXQueryOptimizationContext

Examples of org.apache.vxquery.compiler.rewriter.VXQueryOptimizationContext

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                || op.getOperatorTag() == LogicalOperatorTag.NESTEDTUPLESOURCE) {
            return false;
        }

        // Set cardinality in the context. Must update each time the rule is run.
        VXQueryOptimizationContext vxqueryContext = (VXQueryOptimizationContext) context;
        Cardinality cardinalityVariable = CardinalityRuleToolbox.getProducerCardinality(opRef.getValue(), vxqueryContext);
       
        // Track variables created
       
        // Track variables used

        if (op.getOperatorTag() == LogicalOperatorTag.SUBPLAN && cardinalityVariable == Cardinality.ONE) {
            SubplanOperator subplan = (SubplanOperator) op;

            AbstractLogicalOperator subplanOp = (AbstractLogicalOperator) subplan.getNestedPlans().get(0).getRoots()
                    .get(0).getValue();
            if (subplanOp.getOperatorTag() != LogicalOperatorTag.AGGREGATE) {
                return false;
            }

            // Change plan to remove the subplan.
            opRef.setValue(subplanOp);

            // Make inline the arguments for the subplan.
            AbstractLogicalOperator subplanEnd = findLastSubplanOperator(subplanOp);
            subplanEnd.getInputs().get(0).setValue(subplan.getInputs().get(0).getValue());

        }

        // Now with the new operator, update the variable mappings.
        cardinalityVariable = CardinalityRuleToolbox.updateCardinalityVariable(op, cardinalityVariable, vxqueryContext);
        // Save propagated value.
        vxqueryContext.putCardinalityOperatorMap(opRef.getValue(), cardinalityVariable);

        return false;
    }
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Examples of org.apache.vxquery.compiler.rewriter.VXQueryOptimizationContext

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* @author prestonc
*/
public class IntroduceCollectionRule extends AbstractCollectionRule {
    @Override
    public boolean rewritePre(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
        VXQueryOptimizationContext vxqueryContext = (VXQueryOptimizationContext) context;
        String collectionName = getCollectionName(opRef);

        if (collectionName != null) {
            // Build the new operator and update the query plan.
            int collectionId = vxqueryContext.newCollectionId();
            VXQueryCollectionDataSource ds = VXQueryCollectionDataSource.create(collectionId, collectionName,
                    SequenceType.create(AnyItemType.INSTANCE, Quantifier.QUANT_STAR));
            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();
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Examples of org.apache.vxquery.compiler.rewriter.VXQueryOptimizationContext

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                || op.getOperatorTag() == LogicalOperatorTag.NESTEDTUPLESOURCE) {
            return false;
        }

        // Initialization.
        VXQueryOptimizationContext vxqueryContext = (VXQueryOptimizationContext) context;

        // Find the available variables.
        Cardinality cardinalityVariable = CardinalityRuleToolbox.getProducerCardinality(opRef.getValue(),
                vxqueryContext);
        HashMap<Integer, DocumentOrder> documentOrderVariables = getProducerDocumentOrderVariableMap(opRef.getValue(),
                vxqueryContext);
        HashMap<Integer, UniqueNodes> uniqueNodesVariables = getProducerUniqueNodesVariableMap(opRef.getValue(),
                vxqueryContext);

        // Update sort operator if found.
        int variableId = getOperatorSortDistinctNodesAscOrAtomicsArgumentVariableId(opRef);
        if (variableId > 0) {
            // Find the function expression.
            // All the checks for these variable assigns and casting were done in the
            // getOperatorSortDistinctNodesAscOrAtomicsArgumentVariableId function.
            AssignOperator assign = (AssignOperator) op;
            ILogicalExpression logicalExpression = (ILogicalExpression) assign.getExpressions().get(0).getValue();
            AbstractFunctionCallExpression functionCall = (AbstractFunctionCallExpression) logicalExpression;

            if (uniqueNodesVariables.get(variableId) == UniqueNodes.YES) {
                // Only unique nodes.
                if (documentOrderVariables.get(variableId) == DocumentOrder.YES) {
                    // Do not need to sort or remove duplicates from the result.
                    assign.getExpressions().get(0).setValue(functionCall.getArguments().get(0).getValue());
                    operatorChanged = true;
                } else {
                    // Unique nodes but needs to be sorted.
                    functionCall.setFunctionInfo(BuiltinOperators.SORT_NODES_ASC);
                    operatorChanged = true;
                }
            } else {
                // Duplicates possible in the result.
                if (documentOrderVariables.get(variableId) == DocumentOrder.YES) {
                    // Do not need to sort the result.
                    functionCall.setFunctionInfo(BuiltinOperators.DISTINCT_NODES_OR_ATOMICS);
                    operatorChanged = true;
                } else {
                    // No change.
                }
            }
        }

        // Now with the new operator, update the variable mappings.
        cardinalityVariable = CardinalityRuleToolbox.updateCardinalityVariable(op, cardinalityVariable, vxqueryContext);
        updateVariableMap(op, cardinalityVariable, documentOrderVariables, uniqueNodesVariables, vxqueryContext);

        // Save propagated value.
        vxqueryContext.putCardinalityOperatorMap(opRef.getValue(), cardinalityVariable);
        vxqueryContext.putDocumentOrderOperatorVariableMap(opRef.getValue(), documentOrderVariables);
        vxqueryContext.putUniqueNodesOperatorVariableMap(opRef.getValue(), uniqueNodesVariables);
        return operatorChanged;
    }
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Examples of org.apache.vxquery.compiler.rewriter.VXQueryOptimizationContext

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                    public IOptimizationContext createOptimizationContext(int varCounter,
                            IExpressionEvalSizeComputer expressionEvalSizeComputer,
                            IMergeAggregationExpressionFactory mergeAggregationExpressionFactory,
                            IExpressionTypeComputer expressionTypeComputer, INullableTypeComputer nullableTypeComputer,
                            PhysicalOptimizationConfig physicalOptimizationConfig) {
                        return new VXQueryOptimizationContext(varCounter, expressionEvalSizeComputer,
                                mergeAggregationExpressionFactory, expressionTypeComputer, nullableTypeComputer,
                                physicalOptimizationConfig, pprinter);
                    }
                });
        builder.getPhysicalOptimizationConfig().setFrameSize(this.frameSize);
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Examples of org.apache.vxquery.compiler.rewriter.VXQueryOptimizationContext

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    @Override
    public boolean rewritePre(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
        if (context.checkIfInDontApplySet(this, opRef.getValue())) {
            return false;
        }
        VXQueryOptimizationContext vxqueryContext = (VXQueryOptimizationContext) context;
        vxqueryContext.incrementTotalDataSources();
        context.addToDontApplySet(this, opRef.getValue());
        return false;
    }
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Examples of org.apache.vxquery.compiler.rewriter.VXQueryOptimizationContext

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                    public IOptimizationContext createOptimizationContext(int varCounter,
                            IExpressionEvalSizeComputer expressionEvalSizeComputer,
                            IMergeAggregationExpressionFactory mergeAggregationExpressionFactory,
                            IExpressionTypeComputer expressionTypeComputer, INullableTypeComputer nullableTypeComputer,
                            PhysicalOptimizationConfig physicalOptimizationConfig) {
                        return new VXQueryOptimizationContext(varCounter, expressionEvalSizeComputer,
                                mergeAggregationExpressionFactory, expressionTypeComputer, nullableTypeComputer,
                                physicalOptimizationConfig, pprinter);
                    }
                });
        builder.getPhysicalOptimizationConfig().setFrameSize(this.frameSize);
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