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

Example 36 with VariableReferenceExpression

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

the class LangExpressionToPlanTranslator method translateSubscribeFeed.

private ILogicalOperator translateSubscribeFeed(CompiledSubscribeFeedStatement sfs, DatasetDataSource targetDatasource, LogicalVariable unnestVar, ILogicalOperator topOp, ArrayList<Mutable<ILogicalExpression>> exprs, LogicalVariable resVar, List<Mutable<ILogicalExpression>> varRefsForLoading, Mutable<ILogicalExpression> varRef, ILogicalOperator assign, List<String> additionalFilteringField, AssignOperator additionalFilteringAssign, List<Mutable<ILogicalExpression>> additionalFilteringExpressions) throws AlgebricksException {
    // if the feed is a change feed (i.e, performs different operations), we need to project op variable
    InsertDeleteUpsertOperator feedModificationOp;
    AssignOperator metaAndKeysAssign;
    List<LogicalVariable> metaAndKeysVars = null;
    List<Mutable<ILogicalExpression>> metaAndKeysExprs = null;
    List<Mutable<ILogicalExpression>> metaExpSingletonList = null;
    Feed feed = metadataProvider.findFeed(sfs.getDataverseName(), sfs.getFeedName());
    boolean isChangeFeed = ExternalDataUtils.isChangeFeed(feed.getAdapterConfiguration());
    boolean isUpsertFeed = ExternalDataUtils.isUpsertFeed(feed.getAdapterConfiguration());
    ProjectOperator project = (ProjectOperator) topOp;
    if (targetDatasource.getDataset().hasMetaPart() || isChangeFeed) {
        metaAndKeysVars = new ArrayList<>();
        metaAndKeysExprs = new ArrayList<>();
        if (targetDatasource.getDataset().hasMetaPart()) {
            // add the meta function
            IFunctionInfo finfoMeta = FunctionUtil.getFunctionInfo(BuiltinFunctions.META);
            ScalarFunctionCallExpression metaFunction = new ScalarFunctionCallExpression(finfoMeta, new MutableObject<>(new VariableReferenceExpression(unnestVar)));
            // create assign for the meta part
            LogicalVariable metaVar = context.newVar();
            metaExpSingletonList = new ArrayList<>(1);
            metaExpSingletonList.add(new MutableObject<>(new VariableReferenceExpression(metaVar)));
            metaAndKeysVars.add(metaVar);
            metaAndKeysExprs.add(new MutableObject<>(metaFunction));
            project.getVariables().add(metaVar);
        }
    }
    if (isChangeFeed) {
        varRefsForLoading.clear();
        for (Mutable<ILogicalExpression> assignExpr : exprs) {
            if (assignExpr.getValue().getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
                AbstractFunctionCallExpression funcCall = (AbstractFunctionCallExpression) assignExpr.getValue();
                funcCall.substituteVar(resVar, unnestVar);
                LogicalVariable pkVar = context.newVar();
                metaAndKeysVars.add(pkVar);
                metaAndKeysExprs.add(new MutableObject<>(assignExpr.getValue()));
                project.getVariables().add(pkVar);
                varRefsForLoading.add(new MutableObject<>(new VariableReferenceExpression(pkVar)));
            }
        }
        // A change feed, we don't need the assign to access PKs
        feedModificationOp = new InsertDeleteUpsertOperator(targetDatasource, varRef, varRefsForLoading, metaExpSingletonList, InsertDeleteUpsertOperator.Kind.UPSERT, false);
        // Create and add a new variable used for representing the original record
        feedModificationOp.setPrevRecordVar(context.newVar());
        feedModificationOp.setPrevRecordType(targetDatasource.getItemType());
        if (targetDatasource.getDataset().hasMetaPart()) {
            List<LogicalVariable> metaVars = new ArrayList<>();
            metaVars.add(context.newVar());
            feedModificationOp.setPrevAdditionalNonFilteringVars(metaVars);
            List<Object> metaTypes = new ArrayList<>();
            metaTypes.add(targetDatasource.getMetaItemType());
            feedModificationOp.setPrevAdditionalNonFilteringTypes(metaTypes);
        }
        if (additionalFilteringField != null) {
            feedModificationOp.setPrevFilterVar(context.newVar());
            feedModificationOp.setPrevFilterType(((ARecordType) targetDatasource.getItemType()).getFieldType(additionalFilteringField.get(0)));
            additionalFilteringAssign.getInputs().clear();
            additionalFilteringAssign.getInputs().add(assign.getInputs().get(0));
            feedModificationOp.getInputs().add(new MutableObject<>(additionalFilteringAssign));
        } else {
            feedModificationOp.getInputs().add(assign.getInputs().get(0));
        }
    } else {
        final InsertDeleteUpsertOperator.Kind opKind = isUpsertFeed ? InsertDeleteUpsertOperator.Kind.UPSERT : InsertDeleteUpsertOperator.Kind.INSERT;
        feedModificationOp = new InsertDeleteUpsertOperator(targetDatasource, varRef, varRefsForLoading, metaExpSingletonList, opKind, false);
        if (isUpsertFeed) {
            feedModificationOp.setPrevRecordVar(context.newVar());
            feedModificationOp.setPrevRecordType(targetDatasource.getItemType());
        }
        feedModificationOp.getInputs().add(new MutableObject<>(assign));
    }
    if (targetDatasource.getDataset().hasMetaPart() || isChangeFeed) {
        metaAndKeysAssign = new AssignOperator(metaAndKeysVars, metaAndKeysExprs);
        metaAndKeysAssign.getInputs().add(topOp.getInputs().get(0));
        topOp.getInputs().set(0, new MutableObject<>(metaAndKeysAssign));
    }
    feedModificationOp.setAdditionalFilteringExpressions(additionalFilteringExpressions);
    ILogicalOperator leafOperator = new DelegateOperator(new CommitOperator(true));
    leafOperator.getInputs().add(new MutableObject<>(feedModificationOp));
    return leafOperator;
}

Example 37 with VariableReferenceExpression

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

the class LangExpressionToPlanTranslator method translateUnionAllFromInputExprs.

// Generates the plan for "UNION ALL" or union expression from its input expressions.
protected Pair<ILogicalOperator, LogicalVariable> translateUnionAllFromInputExprs(List<ILangExpression> inputExprs, Mutable<ILogicalOperator> tupSource) throws CompilationException {
    List<Mutable<ILogicalOperator>> inputOpRefsToUnion = new ArrayList<>();
    List<LogicalVariable> vars = new ArrayList<>();
    for (ILangExpression expr : inputExprs) {
        // Visits the expression of one branch.
        Pair<ILogicalOperator, LogicalVariable> opAndVar = expr.accept(this, tupSource);
        // Creates an unnest operator.
        LogicalVariable unnestVar = context.newVar();
        List<Mutable<ILogicalExpression>> args = new ArrayList<>();
        args.add(new MutableObject<ILogicalExpression>(new VariableReferenceExpression(opAndVar.second)));
        UnnestOperator unnestOp = new UnnestOperator(unnestVar, new MutableObject<ILogicalExpression>(new UnnestingFunctionCallExpression(FunctionUtil.getFunctionInfo(BuiltinFunctions.SCAN_COLLECTION), args)));
        unnestOp.getInputs().add(new MutableObject<>(opAndVar.first));
        inputOpRefsToUnion.add(new MutableObject<ILogicalOperator>(unnestOp));
        vars.add(unnestVar);
    }
    // Creates a tree of binary union-all operators.
    UnionAllOperator topUnionAllOp = null;
    LogicalVariable topUnionVar = null;
    Iterator<Mutable<ILogicalOperator>> inputOpRefIterator = inputOpRefsToUnion.iterator();
    Mutable<ILogicalOperator> leftInputBranch = inputOpRefIterator.next();
    Iterator<LogicalVariable> inputVarIterator = vars.iterator();
    LogicalVariable leftInputVar = inputVarIterator.next();
    while (inputOpRefIterator.hasNext()) {
        // Generates the variable triple <leftVar, rightVar, outputVar> .
        topUnionVar = context.newVar();
        Triple<LogicalVariable, LogicalVariable, LogicalVariable> varTriple = new Triple<>(leftInputVar, inputVarIterator.next(), topUnionVar);
        List<Triple<LogicalVariable, LogicalVariable, LogicalVariable>> varTriples = new ArrayList<>();
        varTriples.add(varTriple);
        // Creates a binary union-all operator.
        topUnionAllOp = new UnionAllOperator(varTriples);
        topUnionAllOp.getInputs().add(leftInputBranch);
        topUnionAllOp.getInputs().add(inputOpRefIterator.next());
        // Re-assigns leftInputBranch and leftInputVar.
        leftInputBranch = new MutableObject<>(topUnionAllOp);
        leftInputVar = topUnionVar;
    }
    return new Pair<>(topUnionAllOp, topUnionVar);
}

Example 38 with VariableReferenceExpression

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

the class LangExpressionToPlanTranslator method translateLoad.

@Override
public ILogicalPlan translateLoad(ICompiledDmlStatement stmt) throws AlgebricksException {
    CompiledLoadFromFileStatement clffs = (CompiledLoadFromFileStatement) stmt;
    Dataset dataset = metadataProvider.findDataset(clffs.getDataverseName(), clffs.getDatasetName());
    if (dataset == null) {
        // This would never happen since we check for this in AqlTranslator
        throw new AlgebricksException("Unable to load dataset " + clffs.getDatasetName() + " since it does not exist");
    }
    IAType itemType = metadataProvider.findType(dataset.getItemTypeDataverseName(), dataset.getItemTypeName());
    IAType metaItemType = metadataProvider.findType(dataset.getMetaItemTypeDataverseName(), dataset.getMetaItemTypeName());
    DatasetDataSource targetDatasource = validateDatasetInfo(metadataProvider, stmt.getDataverseName(), stmt.getDatasetName());
    List<List<String>> partitionKeys = targetDatasource.getDataset().getPrimaryKeys();
    if (dataset.hasMetaPart()) {
        throw new AlgebricksException(dataset.getDatasetName() + ": load dataset is not supported on Datasets with Meta records");
    }
    LoadableDataSource lds;
    try {
        lds = new LoadableDataSource(dataset, itemType, metaItemType, clffs.getAdapter(), clffs.getProperties());
    } catch (IOException e) {
        throw new AlgebricksException(e);
    }
    // etsOp is a dummy input operator used to keep the compiler happy. it
    // could be removed but would result in
    // the need to fix many rewrite rules that assume that datasourcescan
    // operators always have input.
    ILogicalOperator etsOp = new EmptyTupleSourceOperator();
    // Add a logical variable for the record.
    List<LogicalVariable> payloadVars = new ArrayList<>();
    payloadVars.add(context.newVar());
    // Create a scan operator and make the empty tuple source its input
    DataSourceScanOperator dssOp = new DataSourceScanOperator(payloadVars, lds);
    dssOp.getInputs().add(new MutableObject<>(etsOp));
    ILogicalExpression payloadExpr = new VariableReferenceExpression(payloadVars.get(0));
    Mutable<ILogicalExpression> payloadRef = new MutableObject<>(payloadExpr);
    // Creating the assign to extract the PK out of the record
    ArrayList<LogicalVariable> pkVars = new ArrayList<>();
    ArrayList<Mutable<ILogicalExpression>> pkExprs = new ArrayList<>();
    List<Mutable<ILogicalExpression>> varRefsForLoading = new ArrayList<>();
    LogicalVariable payloadVar = payloadVars.get(0);
    for (List<String> keyFieldName : partitionKeys) {
        PlanTranslationUtil.prepareVarAndExpression(keyFieldName, payloadVar, pkVars, pkExprs, varRefsForLoading, context);
    }
    AssignOperator assign = new AssignOperator(pkVars, pkExprs);
    assign.getInputs().add(new MutableObject<>(dssOp));
    // If the input is pre-sorted, we set the ordering property explicitly in the assign
    if (clffs.alreadySorted()) {
        List<OrderColumn> orderColumns = new ArrayList<>();
        for (int i = 0; i < pkVars.size(); ++i) {
            orderColumns.add(new OrderColumn(pkVars.get(i), OrderKind.ASC));
        }
        assign.setExplicitOrderingProperty(new LocalOrderProperty(orderColumns));
    }
    List<String> additionalFilteringField = DatasetUtil.getFilterField(targetDatasource.getDataset());
    List<LogicalVariable> additionalFilteringVars;
    List<Mutable<ILogicalExpression>> additionalFilteringAssignExpressions;
    List<Mutable<ILogicalExpression>> additionalFilteringExpressions = null;
    AssignOperator additionalFilteringAssign = null;
    if (additionalFilteringField != null) {
        additionalFilteringVars = new ArrayList<>();
        additionalFilteringAssignExpressions = new ArrayList<>();
        additionalFilteringExpressions = new ArrayList<>();
        PlanTranslationUtil.prepareVarAndExpression(additionalFilteringField, payloadVar, additionalFilteringVars, additionalFilteringAssignExpressions, additionalFilteringExpressions, context);
        additionalFilteringAssign = new AssignOperator(additionalFilteringVars, additionalFilteringAssignExpressions);
    }
    InsertDeleteUpsertOperator insertOp = new InsertDeleteUpsertOperator(targetDatasource, payloadRef, varRefsForLoading, InsertDeleteUpsertOperator.Kind.INSERT, true);
    insertOp.setAdditionalFilteringExpressions(additionalFilteringExpressions);
    if (additionalFilteringAssign != null) {
        additionalFilteringAssign.getInputs().add(new MutableObject<>(assign));
        insertOp.getInputs().add(new MutableObject<>(additionalFilteringAssign));
    } else {
        insertOp.getInputs().add(new MutableObject<>(assign));
    }
    ILogicalOperator leafOperator = new SinkOperator();
    leafOperator.getInputs().add(new MutableObject<>(insertOp));
    return new ALogicalPlanImpl(new MutableObject<>(leafOperator));
}

Example 39 with VariableReferenceExpression

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

the class EquivalenceClassUtils method addEquivalenceClassesForPrimaryIndexAccess.

/**
     * Adds equivalent classes for primary index accesses, including unnest-map for
     * primary index access and data source scan through primary index ---
     * one equivalent class between a primary key variable and a record field-access expression.
     *
     * @param operator
     *            , the primary index access operator.
     * @param indexSearchVars
     *            , the returned variables from primary index access. The last variable
     *            is the record variable.
     * @param recordType
     *            , the record type of an index payload record.
     * @param metaRecordType
     *            , the type of a meta record associated with an index payload record.
     * @param dataset
     *            , the accessed dataset.
     * @param context
     *            , the optimization context.
     * @throws AlgebricksException
     */
@SuppressWarnings("unchecked")
public static void addEquivalenceClassesForPrimaryIndexAccess(ILogicalOperator operator, List<LogicalVariable> indexSearchVars, ARecordType recordType, ARecordType metaRecordType, Dataset dataset, IOptimizationContext context) throws AlgebricksException {
    if (dataset.getDatasetDetails().getDatasetType() != DatasetType.INTERNAL) {
        return;
    }
    InternalDatasetDetails datasetDetails = (InternalDatasetDetails) dataset.getDatasetDetails();
    List<List<String>> primaryKey = datasetDetails.getPrimaryKey();
    Map<String, Integer> fieldNameToIndexMap = new HashMap<String, Integer>();
    String[] fieldNames = recordType.getFieldNames();
    for (int fieldIndex = 0; fieldIndex < fieldNames.length; ++fieldIndex) {
        fieldNameToIndexMap.put(fieldNames[fieldIndex], fieldIndex);
    }
    boolean hasMeta = dataset.hasMetaPart();
    Map<String, Integer> metaFieldNameToIndexMap = new HashMap<>();
    if (hasMeta) {
        String[] metaFieldNames = metaRecordType.getFieldNames();
        for (int metaFieldIndex = 0; metaFieldIndex < metaFieldNames.length; ++metaFieldIndex) {
            metaFieldNameToIndexMap.put(metaFieldNames[metaFieldIndex], metaFieldIndex);
        }
    }
    List<Integer> keySourceIndicators = datasetDetails.getKeySourceIndicator();
    LogicalVariable recordVar = hasMeta ? indexSearchVars.get(indexSearchVars.size() - 2) : indexSearchVars.get(indexSearchVars.size() - 1);
    LogicalVariable metaRecordVar = hasMeta ? indexSearchVars.get(indexSearchVars.size() - 1) : null;
    for (int pkIndex = 0; pkIndex < primaryKey.size(); ++pkIndex) {
        LogicalVariable referredRecordVar = recordVar;
        String pkFieldName = primaryKey.get(pkIndex).get(0);
        int source = keySourceIndicators.get(pkIndex);
        Integer fieldIndexInRecord;
        if (source == 0) {
            // The field is from the main record.
            fieldIndexInRecord = fieldNameToIndexMap.get(pkFieldName);
        } else {
            // The field is from the auxiliary meta record.
            referredRecordVar = metaRecordVar;
            fieldIndexInRecord = metaFieldNameToIndexMap.get(pkFieldName);
        }
        LogicalVariable var = indexSearchVars.get(pkIndex);
        ILogicalExpression expr = new ScalarFunctionCallExpression(FunctionUtil.getFunctionInfo(BuiltinFunctions.FIELD_ACCESS_BY_INDEX), new MutableObject<ILogicalExpression>(new VariableReferenceExpression(referredRecordVar)), new MutableObject<ILogicalExpression>(new ConstantExpression(new AsterixConstantValue(new AInt32(fieldIndexInRecord)))));
        EquivalenceClass equivClass = new EquivalenceClass(Collections.singletonList(var), var, Collections.singletonList(expr));
        Map<LogicalVariable, EquivalenceClass> equivalenceMap = context.getEquivalenceClassMap(operator);
        if (equivalenceMap == null) {
            equivalenceMap = new HashMap<LogicalVariable, EquivalenceClass>();
            context.putEquivalenceClassMap(operator, equivalenceMap);
        }
        equivalenceMap.put(var, equivClass);
    }
}

Example 40 with VariableReferenceExpression

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

the class LangExpressionToPlanTranslator method aggListifyForSubquery.

protected Pair<ILogicalOperator, LogicalVariable> aggListifyForSubquery(LogicalVariable var, Mutable<ILogicalOperator> opRef, boolean bProject) {
    AggregateFunctionCallExpression funAgg = BuiltinFunctions.makeAggregateFunctionExpression(BuiltinFunctions.LISTIFY, new ArrayList<>());
    funAgg.getArguments().add(new MutableObject<>(new VariableReferenceExpression(var)));
    LogicalVariable varListified = context.newSubplanOutputVar();
    AggregateOperator agg = new AggregateOperator(mkSingletonArrayList(varListified), mkSingletonArrayList(new MutableObject<>(funAgg)));
    agg.getInputs().add(opRef);
    ILogicalOperator res;
    if (bProject) {
        ProjectOperator pr = new ProjectOperator(varListified);
        pr.getInputs().add(new MutableObject<>(agg));
        res = pr;
    } else {
        res = agg;
    }
    return new Pair<>(res, varListified);
}