Package edu.uci.ics.hyracks.algebricks.core.algebra.expressions

Examples of edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression

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     * Search pattern 2: $$ for aggregate [function-call: sequence()]
     */
    @Override
    public boolean rewritePre(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
        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);
        ILogicalExpression logicalExpression = mutableLogicalExpression.getValue();
        if (logicalExpression.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
            return false;
        }
        AbstractFunctionCallExpression functionCall = (AbstractFunctionCallExpression) logicalExpression;
        // TODO get the function through the function definition
        aggregateInfo = getAggregateFunction(functionCall);
        if (aggregateInfo == null) {
            return false;
        }
        Mutable<ILogicalExpression> mutableVariableExpresion = ExpressionToolbox.findVariableExpression(mutableLogicalExpression);
        if (mutableVariableExpresion == null) {
            return false;
        }
        Mutable<ILogicalExpression> finalFunctionCallM = ExpressionToolbox
                .findLastFunctionExpression(mutableLogicalExpression);
        finalFunctionCall = (AbstractFunctionCallExpression) finalFunctionCallM.getValue();

       
        // Build a subplan for replacing the sort distinct function with operators.
        // Nested tuple source.
        Mutable<ILogicalOperator> inputOperator = getInputOperator(assign.getInputs().get(0));
        NestedTupleSourceOperator ntsOperator = new NestedTupleSourceOperator(inputOperator);
        nextOperatorRef = new MutableObject<ILogicalOperator>(ntsOperator);

        // Get variable that is being used for sort and distinct operators.
        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);
        Mutable<ILogicalExpression> aggregateArgs = functionCall.getArguments().get(0);

        LogicalVariable aggregateVariable = assign.getVariables().get(0);
        AggregateOperator aggregateOperator = getAggregateOperator(aggregateInfo, aggregateArgs, aggregateVariable);
        aggregateOperator.getInputs().add(nextOperatorRef);
        nextOperatorRef = new MutableObject<ILogicalOperator>(aggregateOperator);
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        // 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.SUBPLAN) {
            return false;
        }
        SubplanOperator subplan = (SubplanOperator) op2;

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

        // 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;
        }

        // Make inline the arguments for the subplan.
        AbstractLogicalOperator subplanEnd = OperatorToolbox.findLastSubplanOperator(subplanOp);
        int count = 0;
        for (Mutable<ILogicalOperator> input : subplan.getInputs()) {
            subplanEnd.getInputs().get(count++).setValue(input.getValue());
        }

        // 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);
        }
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        // sort-distinct-nodes-asc-or-atomics.
        ILogicalExpression logicalExpression = (ILogicalExpression) assign.getExpressions().get(0).getValue();
        if (logicalExpression.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
            return false;
        }
        AbstractFunctionCallExpression functionCall = (AbstractFunctionCallExpression) logicalExpression;
        if (!functionCall.getFunctionIdentifier().equals(
                BuiltinOperators.SORT_DISTINCT_NODES_ASC_OR_ATOMICS.getFunctionIdentifier())
                && !functionCall.getFunctionIdentifier().equals(
                        BuiltinOperators.DISTINCT_NODES_OR_ATOMICS.getFunctionIdentifier())
                && !functionCall.getFunctionIdentifier().equals(
                        BuiltinOperators.SORT_NODES_ASC_OR_ATOMICS.getFunctionIdentifier())) {
            return false;
        }

        // Build a subplan for replacing the sort distinct function with operators.
        // Nested tuple source.
        Mutable<ILogicalOperator> inputOperator = getInputOperator(assign.getInputs().get(0));
        NestedTupleSourceOperator ntsOperator = new NestedTupleSourceOperator(inputOperator);
        nextOperatorRef = new MutableObject<ILogicalOperator>(ntsOperator);

        // Get variable that is being used for sort and distinct operators.
        VariableReferenceExpression inputVariableRef = (VariableReferenceExpression) functionCall.getArguments().get(0)
                .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,
                BuiltinOperators.ID_FROM_NODE);
        nodeIdAssignOp.getInputs().add(nextOperatorRef);
        nextOperatorRef = new MutableObject<ILogicalOperator>(nodeIdAssignOp);

        // Prepare for Order and Distinct.
        Mutable<ILogicalExpression> nodeIdKeyVariableRef = new MutableObject<ILogicalExpression>(
                new VariableReferenceExpression(nodeIdKeyVariable));

        // Distinct.
        if (functionCall.getFunctionIdentifier().equals(
                BuiltinOperators.SORT_DISTINCT_NODES_ASC_OR_ATOMICS.getFunctionIdentifier())
                || functionCall.getFunctionIdentifier().equals(
                        BuiltinOperators.DISTINCT_NODES_OR_ATOMICS.getFunctionIdentifier())) {
            LogicalVariable groupByVariable = context.newVar();
            ILogicalExpression nodeIdKeyVre = new VariableReferenceExpression(nodeIdKeyVariable);
            GroupByOperator groupByOperator = getGroupByOperator(groupByVariable, nodeIdKeyVre);
            groupByOperator.getInputs().add(nextOperatorRef);
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        Mutable<ILogicalExpression> mutableLogicalExpression = aggregate.getExpressions().get(0);
        ILogicalExpression logicalExpression = mutableLogicalExpression.getValue();
        if (logicalExpression.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
            return false;
        }
        AbstractFunctionCallExpression functionCall = (AbstractFunctionCallExpression) logicalExpression;

        if (AGGREGATE_MAP.containsKey(functionCall.getFunctionIdentifier())) {
            AggregateFunctionCallExpression aggregateFunctionCall = (AggregateFunctionCallExpression) functionCall;
            if (aggregateFunctionCall.isTwoStep()) {
                return false;
            }
            aggregateFunctionCall.setTwoStep(true);
            aggregateFunctionCall.setStepOneAggregate(AGGREGATE_MAP.get(functionCall.getFunctionIdentifier()).first);
            aggregateFunctionCall.setStepTwoAggregate(AGGREGATE_MAP.get(functionCall.getFunctionIdentifier()).second);
            return true;
        }
        return false;
    }
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        // Check to see if the expression is a function and op:sequence.
        ILogicalExpression logicalExpression1 = (ILogicalExpression) aggregate.getExpressions().get(0).getValue();
        if (logicalExpression1.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
            return false;
        }
        AbstractFunctionCallExpression functionCall1 = (AbstractFunctionCallExpression) logicalExpression1;
        if (!functionCall1.getFunctionIdentifier().equals(BuiltinOperators.SEQUENCE.getFunctionIdentifier())) {
            return false;
        }

        Mutable<ILogicalExpression> lvm1 = ExpressionToolbox.findVariableExpression(aggregate.getExpressions().get(0));
        if (lvm1 == null) {
            return false;
        }
        VariableReferenceExpression vre1 = (VariableReferenceExpression) lvm1.getValue();

        // 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();

        // NESTEDTUPLESOURCE
        AbstractLogicalOperator subplanOp3 = (AbstractLogicalOperator) subplanOp2.getInputs().get(0).getValue();
        if (subplanOp3.getOperatorTag() != LogicalOperatorTag.NESTEDTUPLESOURCE) {
            return false;
        }

        // Ensure input is from a UNNEST operator.
        AbstractLogicalOperator subplanInput = (AbstractLogicalOperator) subplan.getInputs().get(0).getValue();
        if (subplanInput.getOperatorTag() != LogicalOperatorTag.ASSIGN) {
            return false;
        }
        AssignOperator assign = (AssignOperator) subplanInput;
        if (!assign.getVariables().contains(vre2.getVariableReference())) {
            return false;
        }

        // Check to see if the expression is the iterate operator.
        ILogicalExpression logicalExpression3 = (ILogicalExpression) assign.getExpressions().get(0).getValue();
        if (logicalExpression3.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
            return false;
        }
        AbstractFunctionCallExpression functionCall3 = (AbstractFunctionCallExpression) logicalExpression3;
        if (!functionCall3.getFunctionIdentifier().equals(BuiltinOperators.TREAT.getFunctionIdentifier())) {
            return false;
        }

        // Find the treat type.
        ILogicalExpression argType = functionCall3.getArguments().get(ARG_TYPE).getValue();
        if (argType.getExpressionTag() != LogicalExpressionTag.CONSTANT) {
            return false;
        }
        TaggedValuePointable tvp = (TaggedValuePointable) TaggedValuePointable.FACTORY.createPointable();
        ExpressionToolbox.getConstantAsPointable((ConstantExpression) argType, tvp);
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        // Check to see if the expression is a function and treat.
        ILogicalExpression logicalExpression11 = (ILogicalExpression) assignTreat.getExpressions().get(0).getValue();
        if (logicalExpression11.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
            return false;
        }
        AbstractFunctionCallExpression functionTreat = (AbstractFunctionCallExpression) logicalExpression11;
        if (!functionTreat.getFunctionIdentifier().equals(BuiltinOperators.TREAT.getFunctionIdentifier())) {
            return false;
        }

        // Find the variable id used as the parameter.
        ILogicalExpression treatArg1 = (ILogicalExpression) functionTreat.getArguments().get(0).getValue();
        if (treatArg1.getExpressionTag() != LogicalExpressionTag.VARIABLE) {
            return false;
        }
        VariableReferenceExpression variableExpression = (VariableReferenceExpression) treatArg1;
        int variableId = variableExpression.getVariableReference().getId();

        // Get type to check against constant.
        ILogicalExpression treatArg2 = (ILogicalExpression) functionTreat.getArguments().get(1).getValue();
        if (treatArg2.getExpressionTag() != LogicalExpressionTag.CONSTANT) {
            return false;
        }
        TaggedValuePointable tvp = (TaggedValuePointable) TaggedValuePointable.FACTORY.createPointable();
        getConstantAsPointable((ConstantExpression) treatArg2, tvp);
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        ILogicalExpression expr = join.getCondition().getValue();
        if (expr.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
            return false;
        }
        AbstractFunctionCallExpression fexp = (AbstractFunctionCallExpression) expr;
        FunctionIdentifier fi = fexp.getFunctionIdentifier();
        if (!(fi.equals(AlgebricksBuiltinFunctions.AND) || fi.equals(AlgebricksBuiltinFunctions.EQ))) {
            return false;
        }
        boolean modified = false;
        List<Mutable<ILogicalExpression>> functionList = new ArrayList<Mutable<ILogicalExpression>>();
        List<Mutable<ILogicalExpression>> variableList = new ArrayList<Mutable<ILogicalExpression>>();
        functionList.clear();
        ExpressionToolbox.findAllFunctionExpressions(join.getCondition(), AlgebricksBuiltinFunctions.EQ, functionList);
        Collection<LogicalVariable> producedVariables = new ArrayList<LogicalVariable>();
        for (Mutable<ILogicalExpression> searchM : functionList) {
            ILogicalExpression search = searchM.getValue();
            if (search.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
                continue;
            }
            AbstractFunctionCallExpression searchExp = (AbstractFunctionCallExpression) search;
            // Go through all argument for EQ.
            for (Mutable<ILogicalExpression> expressionM : searchExp.getArguments()) {
                // Push on to branch when possible.
                for (Mutable<ILogicalOperator> branch : join.getInputs()) {
                    producedVariables.clear();
                    getProducedVariablesInDescendantsAndSelf(branch.getValue(), producedVariables);
                    variableList.clear();
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        boolean modified = false;
        for (FunctionIdentifier fid : ALGEBRICKS_MAP.keySet()) {
            functionList.clear();
            ExpressionToolbox.findAllFunctionExpressions(search, fid, functionList);
            for (Mutable<ILogicalExpression> searchM : functionList) {
                AbstractFunctionCallExpression searchFunction = (AbstractFunctionCallExpression) searchM.getValue();
                searchFunction.setFunctionInfo(ALGEBRICKS_MAP.get(fid));
                // Add boolean function before vxquery expression.
                ScalarFunctionCallExpression booleanExp = new ScalarFunctionCallExpression(
                        BuiltinFunctions.FN_BOOLEAN_1, new MutableObject<ILogicalExpression>(searchM.getValue()));
                searchM.setValue(booleanExp);
                modified = true;
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            // Check to see if the unnest2 expression has a scalar implementation.
            ILogicalExpression logicalExpression2 = (ILogicalExpression) unnest2.getExpressionRef().getValue();
            if (logicalExpression2.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
                return false;
            }
            AbstractFunctionCallExpression functionCall2 = (AbstractFunctionCallExpression) logicalExpression2;
            Function functionInfo2 = (Function) functionCall2.getFunctionInfo();
            if (!functionInfo2.hasScalarEvaluatorFactory()) {
                return false;
            }

            // Find unnest2 variable in unnest1
            Mutable<ILogicalExpression> unnest1Arg = ExpressionToolbox.findVariableExpression(
                    unnest1.getExpressionRef(), unnest2.getVariable());
            if (unnest1Arg == null) {
                return false;
            }

            // Replace unnest2 expression in unnest1
            ScalarFunctionCallExpression child = new ScalarFunctionCallExpression(functionInfo2,
                    functionCall2.getArguments());
            unnest1Arg.setValue(child);

            // Move input for unnest2 into unnest1
            unnest1.getInputs().clear();
            unnest1.getInputs().addAll(unnest2.getInputs());
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        functionList.clear();
        ExpressionToolbox.findAllFunctionExpressions(search, BuiltinFunctions.FN_BOOLEAN_1.getFunctionIdentifier(),
                functionList);
        for (Mutable<ILogicalExpression> searchM : functionList) {
            // Get input function
            AbstractFunctionCallExpression searchFunction = (AbstractFunctionCallExpression) searchM.getValue();
            ILogicalExpression argFirst = searchFunction.getArguments().get(0).getValue();
            if (argFirst.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
                continue;
            }
            AbstractFunctionCallExpression functionCall = (AbstractFunctionCallExpression) argFirst;
            if (ALGEBRICKS_MAP.containsKey(functionCall.getFunctionIdentifier())) {
                FunctionIdentifier algebricksFid = ALGEBRICKS_MAP.get(functionCall.getFunctionIdentifier());
                IFunctionInfo algebricksFunction = context.getMetadataProvider().lookupFunction(algebricksFid);
                functionCall.setFunctionInfo(algebricksFunction);
                searchM.setValue(argFirst);
                modified = true;
            }
        }
        return modified;
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Related Classes of edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression

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