Examples with AbstractFunctionCallExpression org.apache.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression used on opensource projects

Example 86 with AbstractFunctionCallExpression

use of org.apache.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression in project asterixdb by apache.

the class RemoveRedundantListifyRule method appliesForReverseCase.

private boolean appliesForReverseCase(Mutable<ILogicalOperator> opRef, Set<LogicalVariable> varUsedAbove, IOptimizationContext context) throws AlgebricksException {
    AbstractLogicalOperator op1 = (AbstractLogicalOperator) opRef.getValue();
    if (op1.getOperatorTag() != LogicalOperatorTag.AGGREGATE) {
        return false;
    }
    AggregateOperator agg = (AggregateOperator) op1;
    if (agg.getVariables().size() > 1 || agg.getVariables().size() <= 0) {
        return false;
    }
    LogicalVariable aggVar = agg.getVariables().get(0);
    ILogicalExpression aggFun = agg.getExpressions().get(0).getValue();
    AbstractFunctionCallExpression f = (AbstractFunctionCallExpression) aggFun;
    if (!BuiltinFunctions.LISTIFY.equals(f.getFunctionIdentifier())) {
        return false;
    }
    if (f.getArguments().size() != 1) {
        return false;
    }
    ILogicalExpression arg0 = f.getArguments().get(0).getValue();
    if (((AbstractLogicalExpression) arg0).getExpressionTag() != LogicalExpressionTag.VARIABLE) {
        return false;
    }
    LogicalVariable aggInputVar = ((VariableReferenceExpression) arg0).getVariableReference();
    if (varUsedAbove.contains(aggInputVar)) {
        return false;
    }
    if (agg.getInputs().size() == 0) {
        return false;
    }
    AbstractLogicalOperator op2 = (AbstractLogicalOperator) agg.getInputs().get(0).getValue();
    if (op2.getOperatorTag() != LogicalOperatorTag.UNNEST) {
        return false;
    }
    UnnestOperator unnest = (UnnestOperator) op2;
    if (unnest.getPositionalVariable() != null) {
        return false;
    }
    if (!unnest.getVariable().equals(aggInputVar)) {
        return false;
    }
    ILogicalExpression unnestArg = unnest.getExpressionRef().getValue();
    if (unnestArg.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
        return false;
    }
    AbstractFunctionCallExpression scanFunc = (AbstractFunctionCallExpression) unnestArg;
    if (scanFunc.getFunctionIdentifier() != BuiltinFunctions.SCAN_COLLECTION) {
        return false;
    }
    if (scanFunc.getArguments().size() != 1) {
        return false;
    }
    List<LogicalVariable> assgnVars = new ArrayList<>(1);
    assgnVars.add(aggVar);
    AssignOperator assign = new AssignOperator(assgnVars, scanFunc.getArguments());
    assign.getInputs().add(unnest.getInputs().get(0));
    context.computeAndSetTypeEnvironmentForOperator(assign);
    opRef.setValue(assign);
    return true;
}

Example 87 with AbstractFunctionCallExpression

use of org.apache.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression in project asterixdb by apache.

the class SimilarityCheckRule method replaceWithVariableArg.

private boolean replaceWithVariableArg(Mutable<ILogicalExpression> expRef, FunctionIdentifier normFuncIdent, AsterixConstantValue constVal, VariableReferenceExpression varRefExpr, List<AssignOperator> assigns, IOptimizationContext context) throws AlgebricksException {
    // Find variable in assigns to determine its originating function.
    LogicalVariable var = varRefExpr.getVariableReference();
    Mutable<ILogicalExpression> simFuncExprRef = null;
    ScalarFunctionCallExpression simCheckFuncExpr = null;
    AssignOperator matchingAssign = null;
    for (int i = 0; i < assigns.size(); i++) {
        AssignOperator assign = assigns.get(i);
        for (int j = 0; j < assign.getVariables().size(); j++) {
            // Check if variables match.
            if (var != assign.getVariables().get(j)) {
                continue;
            }
            // Check if corresponding expr is a function call.
            if (assign.getExpressions().get(j).getValue().getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
                continue;
            }
            simFuncExprRef = assign.getExpressions().get(j);
            // Analyze function expression and get equivalent similarity check function.
            simCheckFuncExpr = getSimilarityCheckExpr(normFuncIdent, constVal, (AbstractFunctionCallExpression) simFuncExprRef.getValue());
            matchingAssign = assign;
            break;
        }
        if (simCheckFuncExpr != null) {
            break;
        }
    }
    // Only non-null if we found that varRefExpr refers to an optimizable similarity function call.
    if (simCheckFuncExpr != null) {
        // Create a new assign under matchingAssign which assigns the result of our similarity-check function to a variable.
        LogicalVariable newVar = context.newVar();
        AssignOperator newAssign = new AssignOperator(newVar, new MutableObject<ILogicalExpression>(simCheckFuncExpr));
        // Hook up inputs.
        newAssign.getInputs().add(new MutableObject<ILogicalOperator>(matchingAssign.getInputs().get(0).getValue()));
        matchingAssign.getInputs().get(0).setValue(newAssign);
        // Replace select condition with a get-item on newVarFromExpression.
        List<Mutable<ILogicalExpression>> selectGetItemArgs = new ArrayList<Mutable<ILogicalExpression>>();
        // First arg is a variable reference expr on newVarFromExpression.
        selectGetItemArgs.add(new MutableObject<ILogicalExpression>(new VariableReferenceExpression(newVar)));
        // Second arg is the item index to be accessed, here 0.
        selectGetItemArgs.add(new MutableObject<ILogicalExpression>(new ConstantExpression(new AsterixConstantValue(new AInt32(0)))));
        ILogicalExpression selectGetItemExpr = new ScalarFunctionCallExpression(FunctionUtil.getFunctionInfo(BuiltinFunctions.GET_ITEM), selectGetItemArgs);
        // Replace the old similarity function call with the new getItemExpr.
        expRef.setValue(selectGetItemExpr);
        // Replace expr corresponding to original variable in the original assign with a get-item on
        // newVarFromExpression.
        List<Mutable<ILogicalExpression>> assignGetItemArgs = new ArrayList<Mutable<ILogicalExpression>>();
        // First arg is a variable reference expr on newVarFromExpression.
        assignGetItemArgs.add(new MutableObject<ILogicalExpression>(new VariableReferenceExpression(newVar)));
        // Second arg is the item index to be accessed, here 1.
        assignGetItemArgs.add(new MutableObject<ILogicalExpression>(new ConstantExpression(new AsterixConstantValue(new AInt32(1)))));
        ILogicalExpression assignGetItemExpr = new ScalarFunctionCallExpression(FunctionUtil.getFunctionInfo(BuiltinFunctions.GET_ITEM), assignGetItemArgs);
        // Replace the original assign expr with the get-item expr.
        simFuncExprRef.setValue(assignGetItemExpr);
        context.computeAndSetTypeEnvironmentForOperator(newAssign);
        context.computeAndSetTypeEnvironmentForOperator(matchingAssign);
        return true;
    }
    return false;
}

Example 88 with AbstractFunctionCallExpression

use of org.apache.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression in project asterixdb by apache.

the class ResolveVariableRule method resolveInternal.

// Resolves an undefined name to a dataset or a fully qualified variable/field-access path
// based on the given information of dataset matches and candidate paths.
private boolean resolveInternal(Mutable<ILogicalExpression> funcRef, boolean hasMatchedDataset, Collection<Pair<ILogicalExpression, List<String>>> varAccessCandidates, String unresolvedVarName, Triple<Boolean, String, String> fullyQualifiedDatasetPathCandidateFromParent, Mutable<ILogicalExpression> parentFuncRef, IOptimizationContext context) throws AlgebricksException {
    AbstractFunctionCallExpression func = (AbstractFunctionCallExpression) funcRef.getValue();
    int numVarCandidates = varAccessCandidates.size();
    // The resolution order: 1. field-access 2. datasets (standalone-name or fully-qualified)
    if (numVarCandidates > 0) {
        if (numVarCandidates == 1) {
            resolveAsFieldAccess(funcRef, varAccessCandidates.iterator().next());
        } else {
            // More than one possibilities.
            throw new AlgebricksException("Cannot resolve ambiguous alias reference for undefined identifier " + unresolvedVarName);
        }
    } else if (hasMatchedDataset) {
        // Rewrites the "resolve" function to a "dataset" function and only keep the dataset name argument.
        func.setFunctionInfo(FunctionUtil.getFunctionInfo(BuiltinFunctions.DATASET));
        Mutable<ILogicalExpression> datasetNameExpression = func.getArguments().get(0);
        func.getArguments().clear();
        func.getArguments().add(datasetNameExpression);
    } else if (fullyQualifiedDatasetPathCandidateFromParent.first) {
        // Rewrites the parent "field-access" function to a "dataset" function.
        AbstractFunctionCallExpression parentFunc = (AbstractFunctionCallExpression) parentFuncRef.getValue();
        parentFunc.setFunctionInfo(FunctionUtil.getFunctionInfo(BuiltinFunctions.DATASET));
        parentFunc.getArguments().clear();
        parentFunc.getArguments().add(new MutableObject<>(new ConstantExpression(new AsterixConstantValue(new AString(fullyQualifiedDatasetPathCandidateFromParent.second + "." + fullyQualifiedDatasetPathCandidateFromParent.third)))));
    } else {
        MetadataProvider metadataProvider = (MetadataProvider) context.getMetadataProvider();
        // Cannot find any resolution.
        throw new AlgebricksException("Cannot find dataset " + unresolvedVarName + " in dataverse " + metadataProvider.getDefaultDataverseName() + " nor an alias with name " + unresolvedVarName);
    }
    return true;
}

Example 89 with AbstractFunctionCallExpression

use of org.apache.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression in project asterixdb by apache.

the class InvertedIndexAccessMethod method getNonConstArgFieldExprPair.

private LogicalVariable getNonConstArgFieldExprPair(ILogicalExpression nonConstArg, AbstractFunctionCallExpression funcExpr, List<AbstractLogicalOperator> assignsAndUnnests, int matchedAssignOrUnnestIndex) {
    LogicalVariable fieldVar = null;
    // Analyze nonConstArg depending on similarity function.
    if (funcExpr.getFunctionIdentifier() == BuiltinFunctions.SIMILARITY_JACCARD_CHECK) {
        AbstractFunctionCallExpression nonConstFuncExpr = funcExpr;
        if (nonConstArg.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
            nonConstFuncExpr = (AbstractFunctionCallExpression) nonConstArg;
            // TODO: Currently, we're only looking for word and gram tokens (non hashed).
            if (nonConstFuncExpr.getFunctionIdentifier() != BuiltinFunctions.WORD_TOKENS && nonConstFuncExpr.getFunctionIdentifier() != BuiltinFunctions.GRAM_TOKENS) {
                return null;
            }
            // Find the variable that is being tokenized.
            nonConstArg = nonConstFuncExpr.getArguments().get(0).getValue();
        }
    }
    if (funcExpr.getFunctionIdentifier() == BuiltinFunctions.EDIT_DISTANCE_CHECK || funcExpr.getFunctionIdentifier() == BuiltinFunctions.EDIT_DISTANCE_CONTAINS) {
        while (nonConstArg.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
            AbstractFunctionCallExpression nonConstFuncExpr = (AbstractFunctionCallExpression) nonConstArg;
            if (nonConstFuncExpr.getFunctionIdentifier() != BuiltinFunctions.WORD_TOKENS && nonConstFuncExpr.getFunctionIdentifier() != BuiltinFunctions.SUBSTRING && nonConstFuncExpr.getFunctionIdentifier() != BuiltinFunctions.SUBSTRING_BEFORE && nonConstFuncExpr.getFunctionIdentifier() != BuiltinFunctions.SUBSTRING_AFTER) {
                return null;
            }
            // Find the variable whose substring is used in the similarity function
            nonConstArg = nonConstFuncExpr.getArguments().get(0).getValue();
        }
    }
    if (nonConstArg.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
        fieldVar = ((VariableReferenceExpression) nonConstArg).getVariableReference();
    }
    return fieldVar;
}

Example 90 with AbstractFunctionCallExpression

use of org.apache.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression in project asterixdb by apache.

the class OptimizableOperatorSubTree method setDatasetAndTypeMetadata.

/**
     * Find the dataset corresponding to the datasource scan in the metadata.
     * Also sets recordType to be the type of that dataset.
     */
public boolean setDatasetAndTypeMetadata(MetadataProvider metadataProvider) throws AlgebricksException {
    String dataverseName = null;
    String datasetName = null;
    Dataset ds = null;
    ARecordType rType = null;
    List<Mutable<ILogicalOperator>> sourceOpRefs = new ArrayList<>();
    List<DataSourceType> dsTypes = new ArrayList<>();
    sourceOpRefs.add(getDataSourceRef());
    dsTypes.add(getDataSourceType());
    // If there are multiple datasources in the subtree, we need to find the dataset for these.
    if (getIxJoinOuterAdditionalDataSourceRefs() != null) {
        for (int i = 0; i < getIxJoinOuterAdditionalDataSourceRefs().size(); i++) {
            sourceOpRefs.add(getIxJoinOuterAdditionalDataSourceRefs().get(i));
            dsTypes.add(getIxJoinOuterAdditionalDataSourceTypes().get(i));
        }
    }
    for (int i = 0; i < sourceOpRefs.size(); i++) {
        switch(dsTypes.get(i)) {
            case DATASOURCE_SCAN:
                DataSourceScanOperator dataSourceScan = (DataSourceScanOperator) sourceOpRefs.get(i).getValue();
                IDataSource<?> datasource = dataSourceScan.getDataSource();
                if (datasource instanceof DataSource) {
                    byte dsType = ((DataSource) datasource).getDatasourceType();
                    if (dsType != DataSource.Type.INTERNAL_DATASET && dsType != DataSource.Type.EXTERNAL_DATASET) {
                        return false;
                    }
                }
                Pair<String, String> datasetInfo = AnalysisUtil.getDatasetInfo(dataSourceScan);
                dataverseName = datasetInfo.first;
                datasetName = datasetInfo.second;
                break;
            case PRIMARY_INDEX_LOOKUP:
                AbstractUnnestOperator unnestMapOp = (AbstractUnnestOperator) sourceOpRefs.get(i).getValue();
                ILogicalExpression unnestExpr = unnestMapOp.getExpressionRef().getValue();
                AbstractFunctionCallExpression f = (AbstractFunctionCallExpression) unnestExpr;
                AccessMethodJobGenParams jobGenParams = new AccessMethodJobGenParams();
                jobGenParams.readFromFuncArgs(f.getArguments());
                datasetName = jobGenParams.getDatasetName();
                dataverseName = jobGenParams.getDataverseName();
                break;
            case EXTERNAL_SCAN:
                UnnestMapOperator externalScan = (UnnestMapOperator) sourceOpRefs.get(i).getValue();
                datasetInfo = AnalysisUtil.getExternalDatasetInfo(externalScan);
                dataverseName = datasetInfo.first;
                datasetName = datasetInfo.second;
                break;
            case COLLECTION_SCAN:
                if (i != 0) {
                    getIxJoinOuterAdditionalDatasets().add(null);
                    getIxJoinOuterAdditionalRecordTypes().add(null);
                }
                continue;
            case NO_DATASOURCE:
            default:
                return false;
        }
        if (dataverseName == null || datasetName == null) {
            return false;
        }
        // Find the dataset corresponding to the datasource in the metadata.
        ds = metadataProvider.findDataset(dataverseName, datasetName);
        if (ds == null) {
            throw CompilationException.create(ErrorCode.NO_METADATA_FOR_DATASET, datasetName);
        }
        // Get the record type for that dataset.
        IAType itemType = metadataProvider.findType(ds.getItemTypeDataverseName(), ds.getItemTypeName());
        if (itemType.getTypeTag() != ATypeTag.OBJECT) {
            if (i == 0) {
                return false;
            } else {
                getIxJoinOuterAdditionalDatasets().add(null);
                getIxJoinOuterAdditionalRecordTypes().add(null);
            }
        }
        rType = (ARecordType) itemType;
        // Get the meta record type for that dataset.
        IAType metaItemType = metadataProvider.findType(ds.getMetaItemTypeDataverseName(), ds.getMetaItemTypeName());
        // First index is always the primary datasource in this subtree.
        if (i == 0) {
            setDataset(ds);
            setRecordType(rType);
            setMetaRecordType((ARecordType) metaItemType);
        } else {
            getIxJoinOuterAdditionalDatasets().add(ds);
            getIxJoinOuterAdditionalRecordTypes().add(rType);
        }
        dataverseName = null;
        datasetName = null;
        ds = null;
        rType = null;
    }
    return true;
}