Examples of AbstractLogicalOperator

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

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* @author prestonc
*/
public class EliminateUnnestAggregateSequencesRule implements IAlgebraicRewriteRule {
    @Override
    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.
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator

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                LogicalVariable variableId = variableRefExp.getVariableReference();
                Mutable<ILogicalOperator> variableProducer = OperatorToolbox.findProducerOf(opRef, variableId);
                if (variableProducer == null) {
                    return null;
                }
                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);
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator

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            throws AlgebricksException {
        // TODO Fix EliminateSubplanForSinglePathsRule to check for variables used after the subplan.
        // TODO Add back to the rewrite rule list once fixed.
       
        // Do not process empty or nested tuple source.
        AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
        if (op.getOperatorTag() == LogicalOperatorTag.EMPTYTUPLESOURCE
                || 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);
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator

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        return false;
    }

    private AbstractLogicalOperator findLastSubplanOperator(AbstractLogicalOperator op) {
        AbstractLogicalOperator next;
        while (op.getOperatorTag() != LogicalOperatorTag.NESTEDTUPLESOURCE) {
            op = (AbstractLogicalOperator) op.getInputs().get(0).getValue();
            next = (AbstractLogicalOperator) op.getInputs().get(0).getValue();
            if (next.getOperatorTag() == LogicalOperatorTag.NESTEDTUPLESOURCE) {
                break;
            }
        }
        return op;
    }
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator

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     * @param op
     * @param vxqueryContext
     * @return
     */
    public static Cardinality getProducerCardinality(ILogicalOperator op, VXQueryOptimizationContext vxqueryContext) {
        AbstractLogicalOperator producerOp = (AbstractLogicalOperator) op.getInputs().get(0).getValue();
        switch (producerOp.getOperatorTag()) {
            case EMPTYTUPLESOURCE:
                return Cardinality.ONE;
            case NESTEDTUPLESOURCE:
                NestedTupleSourceOperator nestedTuplesource = (NestedTupleSourceOperator) producerOp;
                return getProducerCardinality(nestedTuplesource.getDataSourceReference().getValue(), vxqueryContext);
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator

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                break;
            case GROUP:
            case SUBPLAN:
                // Find the last operator to set a variable and call this function again.
                AbstractOperatorWithNestedPlans operatorWithNestedPlan = (AbstractOperatorWithNestedPlans) op;
                AbstractLogicalOperator lastOperator = (AbstractLogicalOperator) operatorWithNestedPlan
                        .getNestedPlans().get(0).getRoots().get(0).getValue();
                cardinalityVariable = vxqueryContext.getCardinalityOperatorMap(lastOperator);
                break;
            case DATASOURCESCAN:
            case INNERJOIN:
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator

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        IFunctionInfo aggregateInfo;
        AbstractFunctionCallExpression finalFunctionCall;
        Mutable<ILogicalOperator> nextOperatorRef;

        // Check if assign is for aggregate function.
        AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
        if (op.getOperatorTag() != LogicalOperatorTag.ASSIGN) {
            return false;
        }
        AssignOperator assign = (AssignOperator) op;

        Mutable<ILogicalExpression> mutableLogicalExpression = assign.getExpressions().get(0);
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator

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        return new AggregateOperator(aggregateVariables, exprs);
    }

    private Mutable<ILogicalOperator> getInputOperator(Mutable<ILogicalOperator> opRef) {
        AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
        switch (op.getOperatorTag()) {
            case SUBPLAN:
                SubplanOperator subplan = (SubplanOperator) op;
                return getInputOperator(subplan.getNestedPlans().get(0).getRoots().get(0));
            case NESTEDTUPLESOURCE:
                NestedTupleSourceOperator nts = (NestedTupleSourceOperator) op;
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator

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    @Override
    public boolean rewritePost(Mutable<ILogicalOperator> opRef, IOptimizationContext context) {
        Mutable<ILogicalOperator> nextOperatorRef;

        // Check if assign is for sort-distinct-nodes-asc-or-atomics.
        AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
        if (op.getOperatorTag() != LogicalOperatorTag.ASSIGN) {
            return false;
        }
        AssignOperator assign = (AssignOperator) op;

        // Check to see if the expression is a function and
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Examples of edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractLogicalOperator

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        op.addGbyExpression(outputVariable, variableRef);
        return op;
    }

    private Mutable<ILogicalOperator> getInputOperator(Mutable<ILogicalOperator> opRef) {
        AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
        switch (op.getOperatorTag()) {
            case SUBPLAN:
                SubplanOperator subplan = (SubplanOperator) op;
                return getInputOperator(subplan.getNestedPlans().get(0).getRoots().get(0));
            case NESTEDTUPLESOURCE:
                NestedTupleSourceOperator nts = (NestedTupleSourceOperator) op;
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