Examples with DoubleStrategyHashMap org.finos.legend.engine.shared.core.collectionsExtensions.DoubleStrategyHashMap used on opensource projects

Example 1 with DoubleStrategyHashMap

use of org.finos.legend.engine.shared.core.collectionsExtensions.DoubleStrategyHashMap in project legend-engine by finos.

the class RelationalExecutionNodeExecutor method visit.

@Override
public Result visit(ExecutionNode executionNode) {
    if (executionNode instanceof RelationalBlockExecutionNode) {
        RelationalBlockExecutionNode relationalBlockExecutionNode = (RelationalBlockExecutionNode) executionNode;
        ExecutionState connectionAwareState = new ExecutionState(this.executionState);
        ((RelationalStoreExecutionState) connectionAwareState.getStoreExecutionState(StoreType.Relational)).setRetainConnection(true);
        try {
            Result res = new ExecutionNodeExecutor(this.profiles, connectionAwareState).visit((SequenceExecutionNode) relationalBlockExecutionNode);
            ((RelationalStoreExecutionState) connectionAwareState.getStoreExecutionState(StoreType.Relational)).getBlockConnectionContext().unlockAllBlockConnections();
            return res;
        } catch (Exception e) {
            ((RelationalStoreExecutionState) connectionAwareState.getStoreExecutionState(StoreType.Relational)).getBlockConnectionContext().unlockAllBlockConnections();
            ((RelationalStoreExecutionState) connectionAwareState.getStoreExecutionState(StoreType.Relational)).getBlockConnectionContext().closeAllBlockConnections();
            throw e;
        }
    } else if (executionNode instanceof CreateAndPopulateTempTableExecutionNode) {
        CreateAndPopulateTempTableExecutionNode createAndPopulateTempTableExecutionNode = (CreateAndPopulateTempTableExecutionNode) executionNode;
        Stream<Result> results = createAndPopulateTempTableExecutionNode.inputVarNames.stream().map(this.executionState::getResult);
        Stream<?> inputStream = results.flatMap(result -> {
            if (result instanceof ConstantResult) {
                Object value = ((ConstantResult) result).getValue();
                if (value instanceof Map && ((Map<?, ?>) value).get("values") instanceof List) {
                    return ((List<?>) ((Map<?, ?>) value).get("values")).stream().map(val -> ((List<?>) ((Map<?, ?>) val).get("values")).get(0));
                }
                if (value instanceof List) {
                    return ((List<?>) value).stream();
                }
                if (ClassUtils.isPrimitiveOrWrapper(value.getClass()) || (value instanceof String)) {
                    return Stream.of(value);
                }
                if (value instanceof Stream) {
                    return (Stream<?>) value;
                }
                throw new IllegalArgumentException("Result passed into CreateAndPopulateTempTableExecutionNode should be a stream");
            }
            if (result instanceof StreamingObjectResult) {
                return ((StreamingObjectResult<?>) result).getObjectStream();
            }
            throw new IllegalArgumentException("Unexpected Result Type : " + result.getClass().getName());
        });
        if (!(createAndPopulateTempTableExecutionNode.implementation instanceof JavaPlatformImplementation)) {
            throw new RuntimeException("Only Java implementations are currently supported, found: " + createAndPopulateTempTableExecutionNode.implementation);
        }
        JavaPlatformImplementation javaPlatformImpl = (JavaPlatformImplementation) createAndPopulateTempTableExecutionNode.implementation;
        String executionClassName = JavaHelper.getExecutionClassFullName(javaPlatformImpl);
        Class<?> clazz = ExecutionNodeJavaPlatformHelper.getClassToExecute(createAndPopulateTempTableExecutionNode, executionClassName, this.executionState, this.profiles);
        if (Arrays.asList(clazz.getInterfaces()).contains(IRelationalCreateAndPopulateTempTableExecutionNodeSpecifics.class)) {
            try {
                IRelationalCreateAndPopulateTempTableExecutionNodeSpecifics nodeSpecifics = (IRelationalCreateAndPopulateTempTableExecutionNodeSpecifics) clazz.newInstance();
                createAndPopulateTempTableExecutionNode.tempTableColumnMetaData.forEach(t -> t.identifierForGetter = nodeSpecifics.getGetterNameForProperty(t.identifierForGetter));
            } catch (InstantiationException | IllegalAccessException e) {
                throw new RuntimeException(e);
            }
        } else {
            // TODO Remove once platform version supports above and existing plans mitigated
            String executionMethodName = JavaHelper.getExecutionMethodName(javaPlatformImpl);
            createAndPopulateTempTableExecutionNode.tempTableColumnMetaData.forEach(t -> t.identifierForGetter = ExecutionNodeJavaPlatformHelper.executeStaticJavaMethod(createAndPopulateTempTableExecutionNode, executionClassName, executionMethodName, Collections.singletonList(Result.class), Collections.singletonList(new ConstantResult(t.identifierForGetter)), this.executionState, this.profiles));
        }
        RelationalDatabaseCommands databaseCommands = DatabaseManager.fromString(createAndPopulateTempTableExecutionNode.connection.type.name()).relationalDatabaseSupport();
        try (Connection connectionManagerConnection = this.getConnection(createAndPopulateTempTableExecutionNode, databaseCommands, this.profiles, this.executionState)) {
            TempTableStreamingResult tempTableStreamingResult = new TempTableStreamingResult(inputStream, createAndPopulateTempTableExecutionNode);
            String databaseTimeZone = createAndPopulateTempTableExecutionNode.connection.timeZone == null ? RelationalExecutor.DEFAULT_DB_TIME_ZONE : createAndPopulateTempTableExecutionNode.connection.timeZone;
            databaseCommands.accept(RelationalDatabaseCommandsVisitorBuilder.getStreamResultToTempTableVisitor(((RelationalStoreExecutionState) this.executionState.getStoreExecutionState(StoreType.Relational)).getRelationalExecutor().getRelationalExecutionConfiguration(), connectionManagerConnection, tempTableStreamingResult, createAndPopulateTempTableExecutionNode.tempTableName, databaseTimeZone));
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
        return new ConstantResult("success");
    } else if (executionNode instanceof RelationalExecutionNode) {
        RelationalExecutionNode relationalExecutionNode = (RelationalExecutionNode) executionNode;
        Span topSpan = GlobalTracer.get().activeSpan();
        this.executionState.topSpan = topSpan;
        try (Scope scope = GlobalTracer.get().buildSpan("Relational DB Execution").startActive(true)) {
            scope.span().setTag("databaseType", relationalExecutionNode.getDatabaseTypeName());
            scope.span().setTag("sql", relationalExecutionNode.sqlQuery());
            Result result = ((RelationalStoreExecutionState) executionState.getStoreExecutionState(StoreType.Relational)).getRelationalExecutor().execute(relationalExecutionNode, this.profiles, this.executionState);
            if (result instanceof RelationalResult) {
                scope.span().setTag("executedSql", ((RelationalResult) result).executedSQl);
            }
            if (relationalExecutionNode.implementation != null && !(ExecutionNodeResultHelper.isResultSizeRangeSet(relationalExecutionNode) && ExecutionNodeResultHelper.isSingleRecordResult(relationalExecutionNode))) {
                return executeImplementation(relationalExecutionNode, result, this.executionState, this.profiles);
            }
            return result;
        }
    } else if (executionNode instanceof SQLExecutionNode) {
        SQLExecutionNode SQLExecutionNode = (SQLExecutionNode) executionNode;
        this.executionState.topSpan = GlobalTracer.get().activeSpan();
        try (Scope scope = GlobalTracer.get().buildSpan("Relational DB Execution").startActive(true)) {
            scope.span().setTag("databaseType", SQLExecutionNode.getDatabaseTypeName());
            scope.span().setTag("sql", SQLExecutionNode.sqlQuery());
            Result result = ((RelationalStoreExecutionState) executionState.getStoreExecutionState(StoreType.Relational)).getRelationalExecutor().execute(SQLExecutionNode, profiles, executionState);
            if (result instanceof SQLExecutionResult) {
                scope.span().setTag("executedSql", ((SQLExecutionResult) result).getExecutedSql());
            }
            return result;
        }
    } else if (executionNode instanceof RelationalTdsInstantiationExecutionNode) {
        RelationalTdsInstantiationExecutionNode relationalTdsInstantiationExecutionNode = (RelationalTdsInstantiationExecutionNode) executionNode;
        SQLExecutionResult sqlExecutionResult = null;
        try {
            sqlExecutionResult = (SQLExecutionResult) this.visit((SQLExecutionNode) relationalTdsInstantiationExecutionNode.executionNodes.get(0));
            RelationalResult relationalTdsResult = new RelationalResult(sqlExecutionResult, relationalTdsInstantiationExecutionNode);
            if (this.executionState.inAllocation) {
                if (!this.executionState.transformAllocation) {
                    return relationalTdsResult;
                }
                RealizedRelationalResult realizedRelationalResult = (RealizedRelationalResult) relationalTdsResult.realizeInMemory();
                List<Map<String, Object>> rowValueMaps = realizedRelationalResult.getRowValueMaps(false);
                Result res = RelationalExecutor.evaluateAdditionalExtractors(this.resultInterpreterExtensions, this.executionState, rowValueMaps);
                if (res != null) {
                    return res;
                } else {
                    return new ConstantResult(rowValueMaps);
                }
            }
            return relationalTdsResult;
        } catch (Exception e) {
            if (sqlExecutionResult != null) {
                sqlExecutionResult.close();
            }
            throw e;
        }
    } else if (executionNode instanceof RelationalClassInstantiationExecutionNode) {
        RelationalClassInstantiationExecutionNode node = (RelationalClassInstantiationExecutionNode) executionNode;
        SQLExecutionResult sqlExecutionResult = null;
        try {
            SQLExecutionNode innerNode = (SQLExecutionNode) node.executionNodes.get(0);
            sqlExecutionResult = (SQLExecutionResult) this.visit(innerNode);
            RelationalResult relationalResult = new RelationalResult(sqlExecutionResult, node);
            boolean realizeAsConstant = this.executionState.inAllocation && ExecutionNodeResultHelper.isResultSizeRangeSet(node) && ExecutionNodeResultHelper.isSingleRecordResult(node);
            if (realizeAsConstant) {
                RealizedRelationalResult realizedRelationalResult = (RealizedRelationalResult) relationalResult.realizeInMemory();
                List<Map<String, Object>> rowValueMaps = realizedRelationalResult.getRowValueMaps(false);
                if (rowValueMaps.size() == 1) {
                    return new ConstantResult(rowValueMaps.get(0));
                } else {
                    return new ConstantResult(rowValueMaps);
                }
            }
            return this.getStreamingObjectResultFromRelationalResult(node, relationalResult, innerNode.connection);
        } catch (Exception e) {
            if (sqlExecutionResult != null) {
                sqlExecutionResult.close();
            }
            throw (e instanceof RuntimeException) ? (RuntimeException) e : new RuntimeException(e);
        }
    } else if (executionNode instanceof RelationalRelationDataInstantiationExecutionNode) {
        RelationalRelationDataInstantiationExecutionNode node = (RelationalRelationDataInstantiationExecutionNode) executionNode;
        SQLExecutionResult sqlExecutionResult = null;
        try {
            sqlExecutionResult = (SQLExecutionResult) this.visit((SQLExecutionNode) node.executionNodes.get(0));
            return new RelationalResult(sqlExecutionResult, node);
        } catch (Exception e) {
            if (sqlExecutionResult != null) {
                sqlExecutionResult.close();
            }
            throw e;
        }
    } else if (executionNode instanceof RelationalDataTypeInstantiationExecutionNode) {
        RelationalDataTypeInstantiationExecutionNode node = (RelationalDataTypeInstantiationExecutionNode) executionNode;
        SQLExecutionResult sqlExecutionResult = null;
        try {
            sqlExecutionResult = (SQLExecutionResult) this.visit((SQLExecutionNode) node.executionNodes.get(0));
            RelationalResult relationalPrimitiveResult = new RelationalResult(sqlExecutionResult, node);
            if (this.executionState.inAllocation) {
                if ((ExecutionNodeResultHelper.isResultSizeRangeSet(node) && !ExecutionNodeResultHelper.isSingleRecordResult(node)) && !this.executionState.transformAllocation) {
                    return relationalPrimitiveResult;
                }
                if (relationalPrimitiveResult.getResultSet().next()) {
                    List<org.eclipse.collections.api.block.function.Function<Object, Object>> transformers = relationalPrimitiveResult.getTransformers();
                    Object convertedValue = transformers.get(0).valueOf(relationalPrimitiveResult.getResultSet().getObject(1));
                    return new ConstantResult(convertedValue);
                } else {
                    throw new RuntimeException("Result set is empty for allocation node");
                }
            }
            return relationalPrimitiveResult;
        } catch (Exception e) {
            if (sqlExecutionResult != null) {
                sqlExecutionResult.close();
            }
            throw (e instanceof RuntimeException) ? (RuntimeException) e : new RuntimeException(e);
        }
    } else if (executionNode instanceof RelationalRootQueryTempTableGraphFetchExecutionNode) {
        return this.executeRelationalRootQueryTempTableGraphFetchExecutionNode((RelationalRootQueryTempTableGraphFetchExecutionNode) executionNode);
    } else if (executionNode instanceof RelationalCrossRootQueryTempTableGraphFetchExecutionNode) {
        return this.executeRelationalCrossRootQueryTempTableGraphFetchExecutionNode((RelationalCrossRootQueryTempTableGraphFetchExecutionNode) executionNode);
    } else if (executionNode instanceof RelationalPrimitiveQueryGraphFetchExecutionNode) {
        return this.executeRelationalPrimitiveQueryGraphFetchExecutionNode((RelationalPrimitiveQueryGraphFetchExecutionNode) executionNode);
    } else if (executionNode instanceof RelationalClassQueryTempTableGraphFetchExecutionNode) {
        return this.executeRelationalClassQueryTempTableGraphFetchExecutionNode((RelationalClassQueryTempTableGraphFetchExecutionNode) executionNode);
    } else if (executionNode instanceof RelationalRootGraphFetchExecutionNode) {
        RelationalRootGraphFetchExecutionNode node = (RelationalRootGraphFetchExecutionNode) executionNode;
        /* Fetch info from execution state */
        GraphExecutionState graphExecutionState = (GraphExecutionState) executionState;
        int batchSize = graphExecutionState.getBatchSize();
        SQLExecutionResult rootResult = (SQLExecutionResult) graphExecutionState.getRootResult();
        ResultSet rootResultSet = rootResult.getResultSet();
        /* Ensure all children run in the same connection */
        RelationalStoreExecutionState relationalStoreExecutionState = (RelationalStoreExecutionState) graphExecutionState.getStoreExecutionState(StoreType.Relational);
        BlockConnectionContext oldBlockConnectionContext = relationalStoreExecutionState.getBlockConnectionContext();
        boolean oldRetainConnectionFlag = relationalStoreExecutionState.retainConnection();
        relationalStoreExecutionState.setBlockConnectionContext(new BlockConnectionContext());
        relationalStoreExecutionState.setRetainConnection(true);
        try (Scope ignored1 = GlobalTracer.get().buildSpan("Graph Query Relational: Execute Relational Root").startActive(true)) {
            String databaseTimeZone = rootResult.getDatabaseTimeZone();
            String databaseConnectionString = ObjectMapperFactory.getNewStandardObjectMapperWithPureProtocolExtensionSupports().writeValueAsString(rootResult.getSQLExecutionNode().connection);
            /* Get Java executor */
            Class<?> executeClass = this.getExecuteClass(node);
            if (Arrays.asList(executeClass.getInterfaces()).contains(IRelationalRootGraphNodeExecutor.class)) {
                IRelationalRootGraphNodeExecutor executor = (IRelationalRootGraphNodeExecutor) executeClass.getConstructor().newInstance();
                List<Method> primaryKeyGetters = executor.primaryKeyGetters();
                int primaryKeyCount = primaryKeyGetters.size();
                /* Check if caching is enabled and fetch the cache if required */
                boolean cachingEnabledForNode = false;
                ExecutionCache<GraphFetchCacheKey, Object> graphCache = null;
                RelationalGraphFetchUtils.RelationalSQLResultGraphFetchCacheKey rootResultCacheKey = null;
                if ((this.executionState.graphFetchCaches != null) && executor.supportsCaching()) {
                    GraphFetchCacheByEqualityKeys graphFetchCacheByEqualityKeys = RelationalGraphFetchUtils.findCacheByEqualityKeys(node.graphFetchTree, executor.getMappingId(rootResultSet, databaseTimeZone, databaseConnectionString), executor.getInstanceSetId(rootResultSet, databaseTimeZone, databaseConnectionString), this.executionState.graphFetchCaches);
                    if (graphFetchCacheByEqualityKeys != null) {
                        List<String> parentSQLKeyColumns = executor.primaryKeyColumns();
                        List<Integer> parentPrimaryKeyIndices = FastList.newList();
                        for (String pkCol : parentSQLKeyColumns) {
                            parentPrimaryKeyIndices.add(rootResultSet.findColumn(pkCol));
                        }
                        cachingEnabledForNode = true;
                        graphCache = graphFetchCacheByEqualityKeys.getExecutionCache();
                        rootResultCacheKey = new RelationalGraphFetchUtils.RelationalSQLResultGraphFetchCacheKey(rootResult, parentPrimaryKeyIndices);
                    }
                }
                /* Get the next batch of root records */
                List<Object> resultObjectsBatch = new ArrayList<>();
                List<org.finos.legend.engine.plan.dependencies.domain.graphFetch.IGraphInstance<?>> instancesToDeepFetch = new ArrayList<>();
                int objectCount = 0;
                try (Scope ignored2 = GlobalTracer.get().buildSpan("Graph Query Relational: Read Next Batch").startActive(true)) {
                    while (rootResultSet.next()) {
                        graphExecutionState.incrementRowCount();
                        boolean shouldDeepFetchOnThisInstance = true;
                        if (cachingEnabledForNode) {
                            Object cachedObject = graphCache.getIfPresent(rootResultCacheKey);
                            if (cachedObject != null) {
                                resultObjectsBatch.add(executor.deepCopy(cachedObject));
                                shouldDeepFetchOnThisInstance = false;
                            }
                        }
                        if (shouldDeepFetchOnThisInstance) {
                            org.finos.legend.engine.plan.dependencies.domain.graphFetch.IGraphInstance<?> wrappedObject = executor.getObjectFromResultSet(rootResultSet, databaseTimeZone, databaseConnectionString);
                            instancesToDeepFetch.add(wrappedObject);
                            resultObjectsBatch.add(wrappedObject.getValue());
                        }
                        objectCount += 1;
                        if (objectCount >= batchSize) {
                            break;
                        }
                    }
                }
                if (!instancesToDeepFetch.isEmpty()) {
                    boolean childrenExist = node.children != null && !node.children.isEmpty();
                    String tempTableName = node.tempTableName;
                    RealizedRelationalResult realizedRelationalResult = RealizedRelationalResult.emptyRealizedRelationalResult(node.columns);
                    /* Create and populate double strategy map with key being object with its PK getters */
                    DoubleStrategyHashMap<Object, Object, SQLExecutionResult> rootMap = new DoubleStrategyHashMap<>(RelationalGraphFetchUtils.objectSQLResultDoubleHashStrategyWithEmptySecondStrategy(primaryKeyGetters));
                    for (org.finos.legend.engine.plan.dependencies.domain.graphFetch.IGraphInstance<?> rootGraphInstance : instancesToDeepFetch) {
                        Object rootObject = rootGraphInstance.getValue();
                        rootMap.put(rootObject, rootObject);
                        graphExecutionState.addObjectMemoryUtilization(rootGraphInstance.instanceSize());
                        if (childrenExist) {
                            this.addKeyRowToRealizedRelationalResult(rootObject, primaryKeyGetters, realizedRelationalResult);
                        }
                    }
                    /* Execute store local children */
                    if (childrenExist) {
                        this.executeRelationalChildren(node, tempTableName, realizedRelationalResult, rootResult.getSQLExecutionNode().connection, rootResult.getDatabaseType(), databaseTimeZone, rootMap, primaryKeyGetters);
                    }
                }
                graphExecutionState.setObjectsForNodeIndex(node.nodeIndex, resultObjectsBatch);
                if (cachingEnabledForNode) {
                    for (org.finos.legend.engine.plan.dependencies.domain.graphFetch.IGraphInstance<?> deepFetchedInstance : instancesToDeepFetch) {
                        Object objectClone = executor.deepCopy(deepFetchedInstance.getValue());
                        graphCache.put(new RelationalGraphFetchUtils.RelationalObjectGraphFetchCacheKey(objectClone, primaryKeyGetters), objectClone);
                    }
                }
                return new ConstantResult(resultObjectsBatch);
            } else {
                throw new RuntimeException("Unknown execute class " + executeClass.getCanonicalName());
            }
        } catch (RuntimeException e) {
            throw e;
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            relationalStoreExecutionState.getBlockConnectionContext().unlockAllBlockConnections();
            relationalStoreExecutionState.getBlockConnectionContext().closeAllBlockConnectionsAsync();
            relationalStoreExecutionState.setBlockConnectionContext(oldBlockConnectionContext);
            relationalStoreExecutionState.setRetainConnection(oldRetainConnectionFlag);
        }
    } else if (executionNode instanceof RelationalCrossRootGraphFetchExecutionNode) {
        RelationalCrossRootGraphFetchExecutionNode node = (RelationalCrossRootGraphFetchExecutionNode) executionNode;
        GraphExecutionState graphExecutionState = (GraphExecutionState) executionState;
        List<?> parentObjects = graphExecutionState.getObjectsToGraphFetch();
        List<Object> childObjects = FastList.newList();
        graphExecutionState.setObjectsForNodeIndex(node.nodeIndex, childObjects);
        RelationalStoreExecutionState relationalStoreExecutionState = (RelationalStoreExecutionState) graphExecutionState.getStoreExecutionState(StoreType.Relational);
        BlockConnectionContext oldBlockConnectionContext = relationalStoreExecutionState.getBlockConnectionContext();
        boolean oldRetainConnectionFlag = relationalStoreExecutionState.retainConnection();
        relationalStoreExecutionState.setBlockConnectionContext(new BlockConnectionContext());
        relationalStoreExecutionState.setRetainConnection(true);
        SQLExecutionResult childResult = null;
        try (Scope ignored1 = GlobalTracer.get().buildSpan("Graph Query Relational: Execute Relational Cross Root").startActive(true)) {
            /* Get Java executor */
            Class<?> executeClass = this.getExecuteClass(node);
            if (Arrays.asList(executeClass.getInterfaces()).contains(IRelationalCrossRootGraphNodeExecutor.class)) {
                IRelationalCrossRootGraphNodeExecutor executor = (IRelationalCrossRootGraphNodeExecutor) executeClass.getConstructor().newInstance();
                if (!parentObjects.isEmpty()) {
                    String parentTempTableName = node.parentTempTableName;
                    RealizedRelationalResult parentRealizedRelationalResult = RealizedRelationalResult.emptyRealizedRelationalResult(node.parentTempTableColumns);
                    List<Method> crossKeyGetters = executor.parentCrossKeyGetters();
                    int parentKeyCount = crossKeyGetters.size();
                    for (Object parentObject : parentObjects) {
                        this.addKeyRowToRealizedRelationalResult(parentObject, crossKeyGetters, parentRealizedRelationalResult);
                    }
                    graphExecutionState.addResult(parentTempTableName, parentRealizedRelationalResult);
                    /* Execute relational node corresponding to the cross root */
                    childResult = (SQLExecutionResult) node.relationalNode.accept(new ExecutionNodeExecutor(this.profiles, graphExecutionState));
                    ResultSet childResultSet = childResult.getResultSet();
                    boolean childrenExist = node.children != null && !node.children.isEmpty();
                    String tempTableName = childrenExist ? node.tempTableName : null;
                    RealizedRelationalResult realizedRelationalResult = childrenExist ? RealizedRelationalResult.emptyRealizedRelationalResult(node.columns) : null;
                    DatabaseConnection databaseConnection = childResult.getSQLExecutionNode().connection;
                    String databaseType = childResult.getDatabaseType();
                    String databaseTimeZone = childResult.getDatabaseTimeZone();
                    List<String> parentSQLKeyColumns = executor.parentSQLColumnsInResultSet(childResult.getResultColumns().stream().map(ResultColumn::getNonQuotedLabel).collect(Collectors.toList()));
                    List<Integer> parentCrossKeyIndices = FastList.newList();
                    for (String pkCol : parentSQLKeyColumns) {
                        parentCrossKeyIndices.add(childResultSet.findColumn(pkCol));
                    }
                    DoubleStrategyHashMap<Object, List<Object>, SQLExecutionResult> parentMap = new DoubleStrategyHashMap<>(RelationalGraphFetchUtils.objectSQLResultDoubleHashStrategy(crossKeyGetters, parentCrossKeyIndices));
                    for (Object parentObject : parentObjects) {
                        List<Object> mapped = parentMap.get(parentObject);
                        if (mapped == null) {
                            parentMap.put(parentObject, FastList.newListWith(parentObject));
                        } else {
                            mapped.add(parentObject);
                        }
                    }
                    List<Method> primaryKeyGetters = executor.primaryKeyGetters();
                    final int primaryKeyCount = primaryKeyGetters.size();
                    DoubleStrategyHashMap<Object, Object, SQLExecutionResult> currentMap = new DoubleStrategyHashMap<>(RelationalGraphFetchUtils.objectSQLResultDoubleHashStrategyWithEmptySecondStrategy(primaryKeyGetters));
                    String databaseConnectionString = ObjectMapperFactory.getNewStandardObjectMapperWithPureProtocolExtensionSupports().writeValueAsString(childResult.getSQLExecutionNode().connection);
                    while (childResultSet.next()) {
                        graphExecutionState.incrementRowCount();
                        List<Object> parents = parentMap.getWithSecondKey(childResult);
                        if (parents == null) {
                            throw new RuntimeException("No parent");
                        }
                        org.finos.legend.engine.plan.dependencies.domain.graphFetch.IGraphInstance<?> childGraphInstance = executor.getObjectFromResultSet(childResultSet, childResult.getDatabaseTimeZone(), databaseConnectionString);
                        Object child = childGraphInstance.getValue();
                        Object mapObject = currentMap.putIfAbsent(child, child);
                        if (mapObject == null) {
                            mapObject = child;
                            childObjects.add(mapObject);
                            graphExecutionState.addObjectMemoryUtilization(childGraphInstance.instanceSize());
                            if (childrenExist) {
                                this.addKeyRowToRealizedRelationalResult(child, primaryKeyGetters, realizedRelationalResult);
                            }
                        }
                        for (Object parent : parents) {
                            executor.addChildToParent(parent, mapObject, DefaultExecutionNodeContext.factory().create(graphExecutionState, null));
                        }
                    }
                    childResult.close();
                    childResult = null;
                    if (childrenExist) {
                        this.executeRelationalChildren(node, tempTableName, realizedRelationalResult, databaseConnection, databaseType, databaseTimeZone, currentMap, primaryKeyGetters);
                    }
                }
            } else {
                throw new RuntimeException("Unknown execute class " + executeClass.getCanonicalName());
            }
        } catch (RuntimeException e) {
            throw e;
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            if (childResult != null) {
                childResult.close();
            }
            relationalStoreExecutionState.getBlockConnectionContext().unlockAllBlockConnections();
            relationalStoreExecutionState.getBlockConnectionContext().closeAllBlockConnectionsAsync();
            relationalStoreExecutionState.setBlockConnectionContext(oldBlockConnectionContext);
            relationalStoreExecutionState.setRetainConnection(oldRetainConnectionFlag);
        }
        return new ConstantResult(childObjects);
    }
    throw new RuntimeException("Not implemented!");
}

Example 2 with DoubleStrategyHashMap

use of org.finos.legend.engine.shared.core.collectionsExtensions.DoubleStrategyHashMap in project legend-engine by finos.

the class RelationalExecutionNodeExecutor method executeRelationalCrossRootQueryTempTableGraphFetchExecutionNode.

private Result executeRelationalCrossRootQueryTempTableGraphFetchExecutionNode(RelationalCrossRootQueryTempTableGraphFetchExecutionNode node) {
    boolean isLeaf = node.children == null || node.children.isEmpty();
    List<Object> childObjects = new ArrayList<>();
    Result childResult = null;
    RelationalStoreExecutionState relationalStoreExecutionState = (RelationalStoreExecutionState) this.executionState.getStoreExecutionState(StoreType.Relational);
    BlockConnectionContext oldBlockConnectionContext = relationalStoreExecutionState.getBlockConnectionContext();
    boolean oldRetainConnectionFlag = relationalStoreExecutionState.retainConnection();
    relationalStoreExecutionState.setBlockConnectionContext(new BlockConnectionContext());
    relationalStoreExecutionState.setRetainConnection(true);
    try (Scope ignored = GlobalTracer.get().buildSpan("cross store property graph fetch").withTag("storeType", "relational").withTag("property", ((PropertyGraphFetchTree) node.graphFetchTree).property).startActive(true)) {
        IRelationalCrossRootQueryTempTableGraphFetchExecutionNodeSpecifics nodeSpecifics = ExecutionNodeJavaPlatformHelper.getNodeSpecificsInstance(node, this.executionState, this.profiles);
        RelationalGraphObjectsBatch relationalGraphObjectsBatch = new RelationalGraphObjectsBatch(this.executionState.graphObjectsBatch);
        List<?> parentObjects = relationalGraphObjectsBatch.getObjectsForNodeIndex(node.parentIndex);
        if ((parentObjects != null) && !parentObjects.isEmpty()) {
            GraphFetchTree nodeSubTree = node.graphFetchTree;
            boolean cachingEnabled = false;
            ExecutionCache<GraphFetchCacheKey, List<Object>> crossCache = relationalGraphObjectsBatch.getXStorePropertyCacheForNodeIndex(node.nodeIndex);
            List<Method> parentCrossKeyGettersOrderedPerTargetProperties = null;
            if (crossCache != null) {
                cachingEnabled = true;
                parentCrossKeyGettersOrderedPerTargetProperties = nodeSpecifics.parentCrossKeyGettersOrderedByTargetProperties();
            }
            List<Object> parentsToDeepFetch = new ArrayList<>();
            for (Object parent : parentObjects) {
                if (cachingEnabled) {
                    List<Object> children = crossCache.getIfPresent(new RelationalGraphFetchUtils.RelationalCrossObjectGraphFetchCacheKey(parent, parentCrossKeyGettersOrderedPerTargetProperties));
                    if (children == null) {
                        parentsToDeepFetch.add(parent);
                    } else {
                        for (Object child : children) {
                            childObjects.add(child);
                            nodeSpecifics.addChildToParent(parent, child, DefaultExecutionNodeContext.factory().create(this.executionState, null));
                        }
                    }
                } else {
                    parentsToDeepFetch.add(parent);
                }
            }
            if (!parentsToDeepFetch.isEmpty()) {
                Map<Object, List<Object>> parentToChildMap = new HashMap<>();
                RealizedRelationalResult parentRealizedRelationalResult = RealizedRelationalResult.emptyRealizedRelationalResult(node.parentTempTableColumns);
                List<Method> crossKeyGetters = nodeSpecifics.parentCrossKeyGetters();
                for (Object parentObject : parentsToDeepFetch) {
                    this.addKeyRowToRealizedRelationalResult(parentObject, crossKeyGetters, parentRealizedRelationalResult);
                    parentToChildMap.put(parentObject, new ArrayList<>());
                }
                this.executionState.addResult(node.parentTempTableName, parentRealizedRelationalResult);
                childResult = node.executionNodes.get(0).accept(new ExecutionNodeExecutor(this.profiles, this.executionState));
                SQLExecutionResult childSqlResult = (SQLExecutionResult) childResult;
                DatabaseConnection databaseConnection = childSqlResult.getSQLExecutionNode().connection;
                ResultSet childResultSet = childSqlResult.getResultSet();
                List<String> parentSQLKeyColumns = nodeSpecifics.parentCrossKeyColumns(childSqlResult.getResultColumns().stream().map(ResultColumn::getNonQuotedLabel).collect(Collectors.toList()));
                List<Integer> parentCrossKeyIndices = parentSQLKeyColumns.stream().map(FunctionHelper.unchecked(childResultSet::findColumn)).collect(Collectors.toList());
                @SuppressWarnings("MismatchedQueryAndUpdateOfCollection") DoubleStrategyHashMap<Object, List<Object>, SQLExecutionResult> parentMap = new DoubleStrategyHashMap<>(RelationalGraphFetchUtils.objectSQLResultDoubleHashStrategy(crossKeyGetters, parentCrossKeyIndices));
                parentsToDeepFetch.forEach((o) -> parentMap.getIfAbsentPut(o, ArrayList::new).add(o));
                RealizedRelationalResult realizedRelationalResult = RealizedRelationalResult.emptyRealizedRelationalResult(node.columns);
                List<Method> primaryKeyGetters = nodeSpecifics.primaryKeyGetters();
                DoubleStrategyHashMap<Object, Object, SQLExecutionResult> currentMap = new DoubleStrategyHashMap<>(RelationalGraphFetchUtils.objectSQLResultDoubleHashStrategyWithEmptySecondStrategy(primaryKeyGetters));
                /* Prepare for reading */
                nodeSpecifics.prepare(childResultSet, childSqlResult.getDatabaseTimeZone(), ObjectMapperFactory.getNewStandardObjectMapperWithPureProtocolExtensionSupports().writeValueAsString(databaseConnection));
                while (childResultSet.next()) {
                    relationalGraphObjectsBatch.incrementRowCount();
                    List<Object> parents = parentMap.getWithSecondKey(childSqlResult);
                    if (parents == null) {
                        throw new RuntimeException("Cannot find the parent for child");
                    }
                    IGraphInstance<? extends IReferencedObject> childGraphInstance = nodeSpecifics.nextGraphInstance();
                    Object child = childGraphInstance.getValue();
                    Object mapObject = currentMap.putIfAbsent(child, child);
                    if (mapObject == null) {
                        mapObject = child;
                        childObjects.add(mapObject);
                        relationalGraphObjectsBatch.addObjectMemoryUtilization(childGraphInstance.instanceSize());
                        if (!isLeaf) {
                            this.addKeyRowToRealizedRelationalResult(child, primaryKeyGetters, realizedRelationalResult);
                        }
                    }
                    for (Object parent : parents) {
                        if (parentToChildMap.containsKey(parent)) {
                            parentToChildMap.get(parent).add(mapObject);
                        } else {
                            parentToChildMap.put(parent, new ArrayList<>());
                            parentToChildMap.get(parent).add(mapObject);
                        }
                        nodeSpecifics.addChildToParent(parent, mapObject, DefaultExecutionNodeContext.factory().create(this.executionState, null));
                    }
                }
                relationalGraphObjectsBatch.setObjectsForNodeIndex(node.nodeIndex, childObjects);
                childResult.close();
                childResult = null;
                /* Execute store local children */
                if (!isLeaf) {
                    ExecutionState newState = new ExecutionState(executionState);
                    newState.graphObjectsBatch = relationalGraphObjectsBatch;
                    this.executeTempTableNodeChildren(node, realizedRelationalResult, databaseConnection, childSqlResult.getDatabaseType(), childSqlResult.getDatabaseTimeZone(), currentMap, primaryKeyGetters, newState);
                }
                if (cachingEnabled) {
                    List<Method> getters = parentCrossKeyGettersOrderedPerTargetProperties;
                    parentToChildMap.forEach((p, cs) -> {
                        crossCache.put(new RelationalGraphFetchUtils.RelationalCrossObjectGraphFetchCacheKey(p, getters), cs);
                    });
                }
            }
        }
        return new ConstantResult(childObjects);
    } catch (RuntimeException e) {
        throw e;
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        if (childResult != null) {
            childResult.close();
        }
        relationalStoreExecutionState.getBlockConnectionContext().unlockAllBlockConnections();
        relationalStoreExecutionState.getBlockConnectionContext().closeAllBlockConnectionsAsync();
        relationalStoreExecutionState.setBlockConnectionContext(oldBlockConnectionContext);
        relationalStoreExecutionState.setRetainConnection(oldRetainConnectionFlag);
    }
}

Example 3 with DoubleStrategyHashMap

use of org.finos.legend.engine.shared.core.collectionsExtensions.DoubleStrategyHashMap in project legend-engine by finos.

the class RelationalExecutionNodeExecutor method executeLocalRelationalGraphOperation.

private void executeLocalRelationalGraphOperation(RelationalGraphFetchExecutionNode node, DoubleStrategyHashMap<Object, Object, SQLExecutionResult> parentMap, List<Method> parentKeyGetters) {
    GraphExecutionState graphExecutionState = (GraphExecutionState) executionState;
    List<Object> childObjects = FastList.newList();
    graphExecutionState.setObjectsForNodeIndex(node.nodeIndex, childObjects);
    SQLExecutionResult childResult = null;
    try {
        /* Get Java executor */
        Class<?> executeClass = this.getExecuteClass(node);
        if (Arrays.asList(executeClass.getInterfaces()).contains(IRelationalChildGraphNodeExecutor.class)) {
            IRelationalChildGraphNodeExecutor executor = (IRelationalChildGraphNodeExecutor) executeClass.getConstructor().newInstance();
            /* Execute relational node corresponding to the child */
            childResult = (SQLExecutionResult) node.relationalNode.accept(new ExecutionNodeExecutor(profiles, executionState));
            boolean nonPrimitiveNode = node.resultType instanceof ClassResultType;
            boolean childrenExist = node.children != null && !node.children.isEmpty();
            /* Change the second strategy to suit the primary key indices of parent PKs in the child result set*/
            List<String> parentSQLKeyColumns = executor.parentSQLColumnsInResultSet(childResult.getResultColumns().stream().map(ResultColumn::getNonQuotedLabel).collect(Collectors.toList()));
            List<Integer> parentPrimaryKeyIndices = FastList.newList();
            for (String pkCol : parentSQLKeyColumns) {
                parentPrimaryKeyIndices.add(childResult.getResultSet().findColumn(pkCol));
            }
            RelationalGraphFetchUtils.switchSecondKeyHashingStrategy(parentMap, parentKeyGetters, parentPrimaryKeyIndices);
            String databaseConnectionString = ObjectMapperFactory.getNewStandardObjectMapperWithPureProtocolExtensionSupports().writeValueAsString(childResult.getSQLExecutionNode().connection);
            if (nonPrimitiveNode) {
                List<Method> primaryKeyGetters = executor.primaryKeyGetters();
                int primaryKeyCount = primaryKeyGetters.size();
                DoubleStrategyHashMap<Object, Object, SQLExecutionResult> currentMap = new DoubleStrategyHashMap<>(RelationalGraphFetchUtils.objectSQLResultDoubleHashStrategyWithEmptySecondStrategy(primaryKeyGetters));
                String tempTableName = childrenExist ? ((RelationalTempTableGraphFetchExecutionNode) node).tempTableName : null;
                RealizedRelationalResult realizedRelationalResult = childrenExist ? RealizedRelationalResult.emptyRealizedRelationalResult(((RelationalTempTableGraphFetchExecutionNode) node).columns) : null;
                DatabaseConnection databaseConnection = childResult.getSQLExecutionNode().connection;
                String databaseType = childResult.getDatabaseType();
                String databaseTimeZone = childResult.getDatabaseTimeZone();
                ResultSet childResultSet = childResult.getResultSet();
                try (Scope ignored1 = GlobalTracer.get().buildSpan("Graph Query Relational: Read Child Batch").startActive(true)) {
                    while (childResultSet.next()) {
                        graphExecutionState.incrementRowCount();
                        Object parent = parentMap.getWithSecondKey(childResult);
                        if (parent == null) {
                            throw new RuntimeException("No parent");
                        }
                        org.finos.legend.engine.plan.dependencies.domain.graphFetch.IGraphInstance<?> childGraphInstance = executor.getObjectFromResultSet(childResultSet, childResult.getDatabaseTimeZone(), databaseConnectionString);
                        Object child = childGraphInstance.getValue();
                        Object mapObject = currentMap.putIfAbsent(child, child);
                        if (mapObject == null) {
                            mapObject = child;
                            graphExecutionState.addObjectMemoryUtilization(childGraphInstance.instanceSize());
                            childObjects.add(mapObject);
                            if (childrenExist) {
                                this.addKeyRowToRealizedRelationalResult(child, primaryKeyGetters, realizedRelationalResult);
                            }
                        }
                        executor.addChildToParent(parent, mapObject, DefaultExecutionNodeContext.factory().create(graphExecutionState, null));
                    }
                }
                childResult.close();
                childResult = null;
                if (childrenExist) {
                    this.executeRelationalChildren(node, tempTableName, realizedRelationalResult, databaseConnection, databaseType, databaseTimeZone, currentMap, primaryKeyGetters);
                }
            } else {
                ResultSet childResultSet = childResult.getResultSet();
                while (childResultSet.next()) {
                    Object parent = parentMap.getWithSecondKey(childResult);
                    if (parent == null) {
                        throw new RuntimeException("No parent");
                    }
                    org.finos.legend.engine.plan.dependencies.domain.graphFetch.IGraphInstance<?> childGraphInstance = executor.getObjectFromResultSet(childResultSet, childResult.getDatabaseTimeZone(), databaseConnectionString);
                    Object child = childGraphInstance.getValue();
                    childObjects.add(child);
                    graphExecutionState.addObjectMemoryUtilization(childGraphInstance.instanceSize());
                    executor.addChildToParent(parent, child, DefaultExecutionNodeContext.factory().create(graphExecutionState, null));
                }
                childResult.close();
                childResult = null;
            }
        } else {
            throw new RuntimeException("Unknown execute class " + executeClass.getCanonicalName());
        }
    } catch (RuntimeException e) {
        throw e;
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        if (childResult != null) {
            childResult.close();
        }
    }
}

Example 4 with DoubleStrategyHashMap

use of org.finos.legend.engine.shared.core.collectionsExtensions.DoubleStrategyHashMap in project legend-engine by finos.

the class RelationalExecutionNodeExecutor method executeRelationalClassQueryTempTableGraphFetchExecutionNode.

private Result executeRelationalClassQueryTempTableGraphFetchExecutionNode(RelationalClassQueryTempTableGraphFetchExecutionNode node) {
    boolean isLeaf = node.children == null || node.children.isEmpty();
    List<Object> childObjects = new ArrayList<>();
    List<Pair<IGraphInstance<? extends IReferencedObject>, ExecutionCache<GraphFetchCacheKey, Object>>> childInstancesToDeepFetchAndCache = new ArrayList<>();
    Result childResult = null;
    try (Scope ignored = GlobalTracer.get().buildSpan("local store property graph fetch").withTag("storeType", "relational").withTag("property", ((PropertyGraphFetchTree) node.graphFetchTree).property).startActive(true)) {
        RelationalGraphObjectsBatch relationalGraphObjectsBatch = (RelationalGraphObjectsBatch) this.executionState.graphObjectsBatch;
        childResult = node.executionNodes.get(0).accept(new ExecutionNodeExecutor(this.profiles, this.executionState));
        SQLExecutionResult childSqlResult = (SQLExecutionResult) childResult;
        DatabaseConnection databaseConnection = childSqlResult.getSQLExecutionNode().connection;
        ResultSet childResultSet = childSqlResult.getResultSet();
        IRelationalClassQueryTempTableGraphFetchExecutionNodeSpecifics nodeSpecifics = ExecutionNodeJavaPlatformHelper.getNodeSpecificsInstance(node, this.executionState, this.profiles);
        /* Check if caching is enabled and fetch caches if required */
        List<Pair<String, String>> allInstanceSetImplementations = nodeSpecifics.allInstanceSetImplementations();
        int setIdCount = allInstanceSetImplementations.size();
        boolean isUnion = setIdCount > 1;
        RelationalMultiSetExecutionCacheWrapper multiSetCache = new RelationalMultiSetExecutionCacheWrapper(setIdCount);
        boolean cachingEnabledForNode = this.checkForCachingAndPopulateCachingHelpers(allInstanceSetImplementations, nodeSpecifics.supportsCaching(), node.graphFetchTree, childSqlResult, nodeSpecifics::primaryKeyColumns, multiSetCache);
        DoubleStrategyHashMap<Object, Object, SQLExecutionResult> parentMap = this.switchedParentHashMapPerChildResult(relationalGraphObjectsBatch, node.parentIndex, childResultSet, () -> nodeSpecifics.parentPrimaryKeyColumns(childSqlResult.getResultColumns().stream().map(ResultColumn::getNonQuotedLabel).collect(Collectors.toList())));
        List<Method> primaryKeyGetters = nodeSpecifics.primaryKeyGetters();
        DoubleStrategyHashMap<Object, Object, SQLExecutionResult> currentMap = new DoubleStrategyHashMap<>(RelationalGraphFetchUtils.objectSQLResultDoubleHashStrategyWithEmptySecondStrategy(primaryKeyGetters));
        RealizedRelationalResult realizedRelationalResult = RealizedRelationalResult.emptyRealizedRelationalResult(node.columns);
        /* Prepare for reading */
        nodeSpecifics.prepare(childResultSet, childSqlResult.getDatabaseTimeZone(), ObjectMapperFactory.getNewStandardObjectMapperWithPureProtocolExtensionSupports().writeValueAsString(databaseConnection));
        while (childResultSet.next()) {
            relationalGraphObjectsBatch.incrementRowCount();
            Object child;
            int setIndex = isUnion ? childResultSet.getInt(1) : 0;
            Object cachedObject = RelationalExecutionNodeExecutor.this.checkAndReturnCachedObject(cachingEnabledForNode, setIndex, multiSetCache);
            boolean shouldDeepFetchOnThisInstance = cachedObject == null;
            if (shouldDeepFetchOnThisInstance) {
                IGraphInstance<? extends IReferencedObject> wrappedObject = nodeSpecifics.nextGraphInstance();
                Object wrappedValue = wrappedObject.getValue();
                Object mapObject = currentMap.putIfAbsent(wrappedValue, wrappedValue);
                if (mapObject == null) {
                    child = wrappedValue;
                    childInstancesToDeepFetchAndCache.add(Tuples.pair(wrappedObject, multiSetCache.setCaches.get(setIndex)));
                    relationalGraphObjectsBatch.addObjectMemoryUtilization(wrappedObject.instanceSize());
                    childObjects.add(child);
                    if (!isLeaf) {
                        this.addKeyRowToRealizedRelationalResult(child, primaryKeyGetters, realizedRelationalResult);
                    }
                } else {
                    child = mapObject;
                }
            } else {
                childObjects.add(cachedObject);
                child = cachedObject;
            }
            Object parent = parentMap.getWithSecondKey(childSqlResult);
            if (parent == null) {
                throw new RuntimeException("Cannot find the parent for child");
            }
            nodeSpecifics.addChildToParent(parent, child, DefaultExecutionNodeContext.factory().create(this.executionState, null));
        }
        relationalGraphObjectsBatch.setObjectsForNodeIndex(node.nodeIndex, childObjects);
        childResult.close();
        childResult = null;
        /* Execute store local children */
        if (!isLeaf) {
            this.executeTempTableNodeChildren(node, realizedRelationalResult, databaseConnection, childSqlResult.getDatabaseType(), childSqlResult.getDatabaseTimeZone(), currentMap, primaryKeyGetters, this.executionState);
        }
        childInstancesToDeepFetchAndCache.stream().filter(x -> x.getTwo() != null).forEach(x -> {
            Object object = x.getOne().getValue();
            x.getTwo().put(new RelationalGraphFetchUtils.RelationalObjectGraphFetchCacheKey(object, primaryKeyGetters), object);
        });
        return new ConstantResult(childObjects);
    } catch (RuntimeException e) {
        throw e;
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        if (childResult != null) {
            childResult.close();
        }
    }
}

Example 5 with DoubleStrategyHashMap

use of org.finos.legend.engine.shared.core.collectionsExtensions.DoubleStrategyHashMap in project legend-engine by finos.

the class InMemoryExecutionNodeExecutor method visit.

@Override
public Result visit(InMemoryCrossStoreGraphFetchExecutionNode node) {
    List<Object> childObjects = new ArrayList<>();
    Result childResult = null;
    try {
        IInMemoryCrossStoreGraphFetchExecutionNodeSpecifics nodeSpecifics = ExecutionNodeJavaPlatformHelper.getNodeSpecificsInstance(node, this.executionState, this.pm);
        GraphObjectsBatch graphObjectsBatch = new GraphObjectsBatch(this.executionState.graphObjectsBatch);
        List<?> parentObjects = graphObjectsBatch.getObjectsForNodeIndex(node.parentIndex);
        if ((parentObjects != null) && !parentObjects.isEmpty()) {
            DoubleStrategyHashMap<Object, List<Object>, Object> parentMap = new DoubleStrategyHashMap<>(InMemoryGraphFetchUtils.parentChildDoubleHashStrategy(nodeSpecifics));
            parentObjects.forEach(parentObject -> parentMap.getIfAbsentPut(parentObject, ArrayList::new).add(parentObject));
            if (node.supportsBatching) {
                Map<String, List<Object>> keyValuePairs = Maps.mutable.empty();
                nodeSpecifics.getCrossStoreKeysValueForChildren(parentObjects.get(0)).keySet().forEach(key -> keyValuePairs.put(key, Lists.mutable.empty()));
                parentMap.keySet().forEach(parentObject -> nodeSpecifics.getCrossStoreKeysValueForChildren(parentObject).forEach((key, value) -> keyValuePairs.get(key).add(value)));
                keyValuePairs.forEach((key, value) -> this.executionState.addResult(key, new ConstantResult(value)));
                childResult = this.visit((InMemoryRootGraphFetchExecutionNode) node);
                GraphFetchResult childGraphFetchResult = (GraphFetchResult) childResult;
                Stream<GraphObjectsBatch> graphObjectsBatchStream = childGraphFetchResult.getGraphObjectsBatchStream();
                graphObjectsBatchStream.forEach(batch -> {
                    batch.getObjectsForNodeIndex(node.nodeIndex).forEach(child -> {
                        IGraphInstance<?> childGraphInstance = nodeSpecifics.wrapChildInGraphInstance(child);
                        Object childObject = childGraphInstance.getValue();
                        List<Object> parentsInScope = parentMap.getWithSecondKey(childObject);
                        if (parentsInScope != null) {
                            for (Object parentObject : parentsInScope) {
                                boolean isChildAdded = nodeSpecifics.attemptAddingChildToParent(parentObject, childObject);
                                if (isChildAdded) {
                                    graphObjectsBatch.addObjectMemoryUtilization(childGraphInstance.instanceSize());
                                    childObjects.add(childObject);
                                }
                            }
                        }
                    });
                });
            } else {
                for (Map.Entry<Object, List<Object>> entry : parentMap.entrySet()) {
                    Map<String, Object> keyValuePairs = nodeSpecifics.getCrossStoreKeysValueForChildren(entry.getKey());
                    keyValuePairs.forEach((key, value) -> this.executionState.addResult(key, new ConstantResult(value)));
                    childResult = this.visit((InMemoryRootGraphFetchExecutionNode) node);
                    GraphFetchResult childGraphFetchResult = (GraphFetchResult) childResult;
                    Stream<GraphObjectsBatch> graphObjectsBatchStream = childGraphFetchResult.getGraphObjectsBatchStream();
                    graphObjectsBatchStream.forEach(batch -> {
                        batch.getObjectsForNodeIndex(node.nodeIndex).forEach(child -> {
                            IGraphInstance<?> childGraphInstance = nodeSpecifics.wrapChildInGraphInstance(child);
                            Object childObject = childGraphInstance.getValue();
                            List<Object> parentsInScope = entry.getValue();
                            if (parentsInScope != null) {
                                for (Object parentObject : parentsInScope) {
                                    boolean isChildAdded = nodeSpecifics.attemptAddingChildToParent(parentObject, childObject);
                                    if (isChildAdded) {
                                        graphObjectsBatch.addObjectMemoryUtilization(childGraphInstance.instanceSize());
                                        childObjects.add(childObject);
                                    }
                                }
                            }
                        });
                    });
                }
            }
            graphObjectsBatch.setObjectsForNodeIndex(node.nodeIndex, childObjects);
        }
        return new ConstantResult(childObjects);
    } catch (RuntimeException e) {
        throw e;
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        if (childResult != null) {
            childResult.close();
        }
    }
}