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

Examples of edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression

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            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;
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import edu.uci.ics.hyracks.data.std.primitive.IntegerPointable;

public class ExpressionToolbox {
    public static Mutable<ILogicalExpression> findVariableExpression(Mutable<ILogicalExpression> mutableLe,
            LogicalVariable lv) {
        ILogicalExpression le = mutableLe.getValue();
        if (le.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
            VariableReferenceExpression vre = (VariableReferenceExpression) le;
            if (vre.getVariableReference() == lv) {
                return mutableLe;
            }
        } else if (le.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
            AbstractFunctionCallExpression afce = (AbstractFunctionCallExpression) le;
            for (Mutable<ILogicalExpression> argExp : afce.getArguments()) {
                Mutable<ILogicalExpression> resultLe = findVariableExpression(argExp, lv);
                if (resultLe != null) {
                    return resultLe;
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        }
        return null;
    }

    public static Mutable<ILogicalExpression> findVariableExpression(Mutable<ILogicalExpression> mutableLe) {
        ILogicalExpression le = mutableLe.getValue();
        if (le.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
            return mutableLe;
        } else if (le.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
            AbstractFunctionCallExpression afce = (AbstractFunctionCallExpression) le;
            for (Mutable<ILogicalExpression> argExp : afce.getArguments()) {
                Mutable<ILogicalExpression> resultLe = findVariableExpression(argExp);
                if (resultLe != null) {
                    return resultLe;
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        return null;
    }

    public static void findVariableExpressions(Mutable<ILogicalExpression> mutableLe,
            List<Mutable<ILogicalExpression>> finds) {
        ILogicalExpression le = mutableLe.getValue();
        if (le.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
            finds.add(mutableLe);
        } else if (le.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
            AbstractFunctionCallExpression afce = (AbstractFunctionCallExpression) le;
            for (Mutable<ILogicalExpression> argExp : afce.getArguments()) {
                findVariableExpressions(argExp, finds);
            }
        }
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            }
        }
    }

    public static Mutable<ILogicalExpression> findLastFunctionExpression(Mutable<ILogicalExpression> mutableLe) {
        ILogicalExpression le = mutableLe.getValue();
        if (le.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
            return null;
        } else if (le.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
            AbstractFunctionCallExpression afce = (AbstractFunctionCallExpression) le;
            for (Mutable<ILogicalExpression> argExp : afce.getArguments()) {
                if (argExp.getValue().getExpressionTag() == LogicalExpressionTag.VARIABLE) {
                    return mutableLe;
                }
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        return null;
    }

    public static Mutable<ILogicalExpression> findFirstFunctionExpression(Mutable<ILogicalExpression> mutableLe,
            FunctionIdentifier fi) {
        ILogicalExpression le = mutableLe.getValue();
        if (le.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
            AbstractFunctionCallExpression afce = (AbstractFunctionCallExpression) le;
            if (afce.getFunctionIdentifier().equals(fi)) {
                return mutableLe;
            }
            for (Mutable<ILogicalExpression> argExp : afce.getArguments()) {
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    /**
     * Find all functions for a specific expression.
     */
    public static void findAllFunctionExpressions(Mutable<ILogicalExpression> mutableLe, FunctionIdentifier fi,
            List<Mutable<ILogicalExpression>> finds) {
        ILogicalExpression le = mutableLe.getValue();
        if (le.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
            AbstractFunctionCallExpression afce = (AbstractFunctionCallExpression) le;
            if (afce.getFunctionIdentifier().equals(fi)) {
                finds.add(mutableLe);
            }
            for (Mutable<ILogicalExpression> argExp : afce.getArguments()) {
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            }
        }
    }

    public static Function getBuiltIn(Mutable<ILogicalExpression> mutableLe) {
        ILogicalExpression le = mutableLe.getValue();
        if (le.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
            AbstractFunctionCallExpression afce = (AbstractFunctionCallExpression) le;
            for (Function function : BuiltinFunctions.FUNCTION_COLLECTION) {
                if (function.getFunctionIdentifier().equals(afce.getFunctionIdentifier())) {
                    return function;
                }
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    }

    public static int getTypeExpressionTypeArgument(Mutable<ILogicalExpression> searchM) {
        final int ARG_TYPE = 1;
        AbstractFunctionCallExpression searchFunction = (AbstractFunctionCallExpression) searchM.getValue();
        ILogicalExpression argType = searchFunction.getArguments().get(ARG_TYPE).getValue();
        if (argType.getExpressionTag() != LogicalExpressionTag.CONSTANT) {
            return -1;
        }
        TaggedValuePointable tvp = (TaggedValuePointable) TaggedValuePointable.FACTORY.createPointable();
        ExpressionToolbox.getConstantAsPointable((ConstantExpression) argType, tvp);
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        }
    }

    public static SequenceType getOutputSequenceType(Mutable<ILogicalOperator> opRef,
            Mutable<ILogicalExpression> argFirstM, StaticContext dCtx) {
        ILogicalExpression argFirstLe = argFirstM.getValue();
        switch (argFirstLe.getExpressionTag()) {
            case FUNCTION_CALL:
                // Only process defined functions.
                Function function = ExpressionToolbox.getBuiltIn(argFirstM);
                if (function == null) {
                    return null;
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Related Classes of edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression

  • org.apache.vxquery.compiler.algebricks.prettyprint.VXQueryLogicalExpressionPrettyPrintVisitor
  • org.apache.vxquery.compiler.rewriter.rules.AbstractCollectionRule
  • org.apache.vxquery.compiler.rewriter.rules.ConsolidateAssignAggregateRule
  • org.apache.vxquery.compiler.rewriter.rules.ConsolidateUnnestsRule
  • org.apache.vxquery.compiler.rewriter.rules.ConvertAssignSortDistinctNodesToOperatorsRule
  • org.apache.vxquery.compiler.rewriter.rules.ConvertAssignToAggregateRule
  • org.apache.vxquery.compiler.rewriter.rules.ConvertAssignToUnnestRule
  • org.apache.vxquery.compiler.rewriter.rules.ConvertToAlgebricksExpressionsRule
  • org.apache.vxquery.compiler.rewriter.rules.EliminateSubplanForSingleItemsRule
  • org.apache.vxquery.compiler.rewriter.rules.EliminateUnnestAggregateSequencesRule
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