Examples with EvaluatableVisitor org.teiid.query.sql.visitor.EvaluatableVisitor used on opensource projects

Example 1 with EvaluatableVisitor

use of org.teiid.query.sql.visitor.EvaluatableVisitor in project teiid by teiid.

the class MetadataValidator method validate.

private void validate(VDBMetaData vdb, ModelMetaData model, AbstractMetadataRecord record, ValidatorReport report, QueryMetadataInterface metadata, MetadataFactory mf) {
    ValidatorReport resolverReport = null;
    try {
        if (record instanceof Procedure) {
            Procedure p = (Procedure) record;
            Command command = parser.parseProcedure(p.getQueryPlan(), false);
            validateNoReferences(command, report, model);
            QueryResolver.resolveCommand(command, new GroupSymbol(p.getFullName()), Command.TYPE_STORED_PROCEDURE, metadata, false);
            resolverReport = Validator.validate(command, metadata);
            determineDependencies(p, command);
        } else if (record instanceof Table) {
            Table t = (Table) record;
            GroupSymbol symbol = new GroupSymbol(t.getFullName());
            ResolverUtil.resolveGroup(symbol, metadata);
            String selectTransformation = t.getSelectTransformation();
            QueryNode node = null;
            if (t.isVirtual()) {
                QueryCommand command = (QueryCommand) parser.parseCommand(selectTransformation);
                validateNoReferences(command, report, model);
                QueryResolver.resolveCommand(command, metadata);
                resolverReport = Validator.validate(command, metadata);
                if (!resolverReport.hasItems() && (t.getColumns() == null || t.getColumns().isEmpty())) {
                    List<Expression> symbols = command.getProjectedSymbols();
                    for (Expression column : symbols) {
                        try {
                            addColumn(Symbol.getShortName(column), column.getType(), t, mf);
                        } catch (TranslatorException e) {
                            log(report, model, e.getMessage());
                        }
                    }
                }
                node = QueryResolver.resolveView(symbol, new QueryNode(selectTransformation), SQLConstants.Reserved.SELECT, metadata, true);
                if (t.getColumns() != null && !t.getColumns().isEmpty()) {
                    determineDependencies(t, command);
                    if (t.getInsertPlan() != null && t.isInsertPlanEnabled()) {
                        validateUpdatePlan(model, report, metadata, t, t.getInsertPlan(), Command.TYPE_INSERT);
                    }
                    if (t.getUpdatePlan() != null && t.isUpdatePlanEnabled()) {
                        validateUpdatePlan(model, report, metadata, t, t.getUpdatePlan(), Command.TYPE_UPDATE);
                    }
                    if (t.getDeletePlan() != null && t.isDeletePlanEnabled()) {
                        validateUpdatePlan(model, report, metadata, t, t.getDeletePlan(), Command.TYPE_DELETE);
                    }
                }
            }
            boolean addCacheHint = false;
            if (t.isVirtual() && t.isMaterialized() && t.getMaterializedTable() == null) {
                List<KeyRecord> fbis = t.getFunctionBasedIndexes();
                List<GroupSymbol> groups = Arrays.asList(symbol);
                if (fbis != null && !fbis.isEmpty()) {
                    for (KeyRecord fbi : fbis) {
                        for (int j = 0; j < fbi.getColumns().size(); j++) {
                            Column c = fbi.getColumns().get(j);
                            if (c.getParent() != fbi) {
                                continue;
                            }
                            String exprString = c.getNameInSource();
                            try {
                                Expression ex = parser.parseExpression(exprString);
                                validateNoReferences(ex, report, model);
                                ResolverVisitor.resolveLanguageObject(ex, groups, metadata);
                                if (!ValueIteratorProviderCollectorVisitor.getValueIteratorProviders(ex).isEmpty()) {
                                    log(report, model, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31114, exprString, fbi.getFullName()));
                                }
                                EvaluatableVisitor ev = new EvaluatableVisitor();
                                PreOrPostOrderNavigator.doVisit(ex, ev, PreOrPostOrderNavigator.PRE_ORDER);
                                if (ev.getDeterminismLevel().compareTo(Determinism.VDB_DETERMINISTIC) < 0) {
                                    log(report, model, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31115, exprString, fbi.getFullName()));
                                }
                            } catch (QueryResolverException e) {
                                log(report, model, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31116, exprString, fbi.getFullName(), e.getMessage()));
                            }
                        }
                    }
                }
            } else {
                addCacheHint = true;
            }
            if (node != null && addCacheHint && t.isMaterialized()) {
                CacheHint cacheHint = node.getCommand().getCacheHint();
                Long ttl = -1L;
                if (cacheHint != null) {
                    if (cacheHint.getTtl() != null && t.getProperty(MaterializationMetadataRepository.MATVIEW_TTL, false) == null) {
                        ttl = cacheHint.getTtl();
                        t.setProperty(MaterializationMetadataRepository.MATVIEW_TTL, String.valueOf(ttl));
                    }
                    if (cacheHint.getUpdatable() != null && t.getProperty(MaterializationMetadataRepository.MATVIEW_UPDATABLE, false) == null) {
                        t.setProperty(MaterializationMetadataRepository.MATVIEW_UPDATABLE, String.valueOf(cacheHint.getUpdatable()));
                    }
                    if (cacheHint.getPrefersMemory() != null && t.getProperty(MaterializationMetadataRepository.MATVIEW_PREFER_MEMORY, false) == null) {
                        t.setProperty(MaterializationMetadataRepository.MATVIEW_PREFER_MEMORY, String.valueOf(cacheHint.getPrefersMemory()));
                    }
                    if (cacheHint.getScope() != null && t.getProperty(MaterializationMetadataRepository.MATVIEW_SHARE_SCOPE, false) == null) {
                        log(report, model, Severity.WARNING, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31252, t.getName(), cacheHint.getScope().name()));
                        t.setProperty(MaterializationMetadataRepository.MATVIEW_SHARE_SCOPE, MaterializationMetadataRepository.Scope.IMPORTED.name());
                    }
                }
            }
        }
        processReport(model, record, report, resolverReport);
    } catch (TeiidException e) {
        log(report, model, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31080, record.getFullName(), e.getMessage()));
    }
}

Example 2 with EvaluatableVisitor

use of org.teiid.query.sql.visitor.EvaluatableVisitor in project teiid by teiid.

the class PlanToProcessConverter method convertNode.

protected RelationalNode convertNode(PlanNode node) throws TeiidComponentException, TeiidProcessingException {
    RelationalNode processNode = null;
    switch(node.getType()) {
        case NodeConstants.Types.PROJECT:
            GroupSymbol intoGroup = (GroupSymbol) node.getProperty(NodeConstants.Info.INTO_GROUP);
            if (intoGroup != null) {
                try {
                    Insert insert = (Insert) node.getFirstChild().getProperty(Info.VIRTUAL_COMMAND);
                    List<ElementSymbol> allIntoElements = insert.getVariables();
                    Object groupID = intoGroup.getMetadataID();
                    Object modelID = metadata.getModelID(groupID);
                    String modelName = metadata.getFullName(modelID);
                    if (metadata.isVirtualGroup(groupID) && !metadata.isTemporaryTable(groupID)) {
                        InsertPlanExecutionNode ipen = new InsertPlanExecutionNode(getID(), metadata);
                        ProcessorPlan plan = (ProcessorPlan) node.getFirstChild().getProperty(Info.PROCESSOR_PLAN);
                        Assertion.isNotNull(plan);
                        ipen.setProcessorPlan(plan);
                        ipen.setReferences(insert.getValues());
                        processNode = ipen;
                    } else {
                        ProjectIntoNode pinode = new ProjectIntoNode(getID());
                        pinode.setIntoGroup(intoGroup);
                        pinode.setIntoElements(allIntoElements);
                        pinode.setModelName(modelName);
                        pinode.setConstraint((Criteria) node.getProperty(Info.CONSTRAINT));
                        pinode.setSourceHint((SourceHint) node.getProperty(Info.SOURCE_HINT));
                        if (node.hasBooleanProperty(Info.UPSERT)) {
                            pinode.setUpsert(true);
                        }
                        processNode = pinode;
                        SourceCapabilities caps = capFinder.findCapabilities(modelName);
                        if (caps.supportsCapability(Capability.INSERT_WITH_ITERATOR)) {
                            pinode.setMode(org.teiid.query.processor.relational.ProjectIntoNode.Mode.ITERATOR);
                        } else if (caps.supportsCapability(Capability.BATCHED_UPDATES)) {
                            pinode.setMode(org.teiid.query.processor.relational.ProjectIntoNode.Mode.BATCH);
                        } else {
                            pinode.setMode(org.teiid.query.processor.relational.ProjectIntoNode.Mode.SINGLE);
                        }
                        pinode.setTransactionSupport((TransactionSupport) caps.getSourceProperty(Capability.TRANSACTION_SUPPORT));
                    }
                } catch (QueryMetadataException e) {
                    throw new TeiidComponentException(QueryPlugin.Event.TEIID30247, e);
                }
            } else {
                List<Expression> symbols = (List) node.getProperty(NodeConstants.Info.PROJECT_COLS);
                ProjectNode pnode = new ProjectNode(getID());
                pnode.setSelectSymbols(symbols);
                processNode = pnode;
                if (node.hasBooleanProperty(Info.HAS_WINDOW_FUNCTIONS)) {
                    WindowFunctionProjectNode wfpn = new WindowFunctionProjectNode(getID());
                    // with partial projection the window function may already be pushed, we'll check for that here
                    ArrayList<Expression> filtered = new ArrayList<Expression>();
                    List<Expression> childSymbols = (List) node.getFirstChild().getProperty(NodeConstants.Info.OUTPUT_COLS);
                    for (Expression ex : symbols) {
                        ex = SymbolMap.getExpression(ex);
                        if (childSymbols.contains(ex)) {
                            continue;
                        }
                        filtered.add(ex);
                    }
                    Set<WindowFunction> windowFunctions = RuleAssignOutputElements.getWindowFunctions(filtered);
                    if (!windowFunctions.isEmpty()) {
                        // TODO: check for selecting all window functions
                        List<Expression> outputElements = new ArrayList<Expression>(windowFunctions);
                        // collect the other projected expressions
                        for (Expression singleElementSymbol : (List<Expression>) node.getFirstChild().getProperty(Info.OUTPUT_COLS)) {
                            outputElements.add(singleElementSymbol);
                        }
                        wfpn.setElements(outputElements);
                        wfpn.init();
                        pnode.addChild(wfpn);
                        for (WindowFunction wf : windowFunctions) {
                            validateAggregateFunctionEvaluation(wf.getFunction());
                        }
                    }
                }
            }
            break;
        case NodeConstants.Types.JOIN:
            JoinType jtype = (JoinType) node.getProperty(NodeConstants.Info.JOIN_TYPE);
            JoinStrategyType stype = (JoinStrategyType) node.getProperty(NodeConstants.Info.JOIN_STRATEGY);
            JoinNode jnode = new JoinNode(getID());
            jnode.setJoinType(jtype);
            jnode.setLeftDistinct(node.hasBooleanProperty(NodeConstants.Info.IS_LEFT_DISTINCT));
            jnode.setRightDistinct(node.hasBooleanProperty(NodeConstants.Info.IS_RIGHT_DISTINCT));
            List joinCrits = (List) node.getProperty(NodeConstants.Info.JOIN_CRITERIA);
            String depValueSource = (String) node.getProperty(NodeConstants.Info.DEPENDENT_VALUE_SOURCE);
            SortOption leftSort = (SortOption) node.getProperty(NodeConstants.Info.SORT_LEFT);
            if (stype == JoinStrategyType.MERGE || stype == JoinStrategyType.ENHANCED_SORT) {
                MergeJoinStrategy mjStrategy = null;
                if (stype.equals(JoinStrategyType.ENHANCED_SORT)) {
                    EnhancedSortMergeJoinStrategy esmjStrategy = new EnhancedSortMergeJoinStrategy(leftSort, (SortOption) node.getProperty(NodeConstants.Info.SORT_RIGHT));
                    esmjStrategy.setSemiDep(node.hasBooleanProperty(Info.IS_SEMI_DEP));
                    mjStrategy = esmjStrategy;
                } else {
                    mjStrategy = new MergeJoinStrategy(leftSort, (SortOption) node.getProperty(NodeConstants.Info.SORT_RIGHT), false);
                }
                jnode.setJoinStrategy(mjStrategy);
                List leftExpressions = (List) node.getProperty(NodeConstants.Info.LEFT_EXPRESSIONS);
                List rightExpressions = (List) node.getProperty(NodeConstants.Info.RIGHT_EXPRESSIONS);
                jnode.setJoinExpressions(leftExpressions, rightExpressions);
                joinCrits = (List) node.getProperty(NodeConstants.Info.NON_EQUI_JOIN_CRITERIA);
            } else if (stype == JoinStrategyType.NESTED_TABLE) {
                NestedTableJoinStrategy ntjStrategy = new NestedTableJoinStrategy();
                jnode.setJoinStrategy(ntjStrategy);
                SymbolMap references = (SymbolMap) node.getProperty(Info.RIGHT_NESTED_REFERENCES);
                ntjStrategy.setRightMap(references);
            } else {
                NestedLoopJoinStrategy nljStrategy = new NestedLoopJoinStrategy();
                jnode.setJoinStrategy(nljStrategy);
            }
            Criteria joinCrit = Criteria.combineCriteria(joinCrits);
            jnode.setJoinCriteria(joinCrit);
            processNode = jnode;
            jnode.setDependentValueSource(depValueSource);
            break;
        case NodeConstants.Types.ACCESS:
            ProcessorPlan plan = (ProcessorPlan) node.getProperty(NodeConstants.Info.PROCESSOR_PLAN);
            if (plan != null) {
                PlanExecutionNode peNode = null;
                Criteria crit = (Criteria) node.getProperty(NodeConstants.Info.PROCEDURE_CRITERIA);
                if (crit != null) {
                    List references = (List) node.getProperty(NodeConstants.Info.PROCEDURE_INPUTS);
                    List defaults = (List) node.getProperty(NodeConstants.Info.PROCEDURE_DEFAULTS);
                    peNode = new DependentProcedureExecutionNode(getID(), crit, references, defaults);
                } else {
                    peNode = new PlanExecutionNode(getID());
                }
                peNode.setProcessorPlan(plan);
                processNode = peNode;
            } else {
                AccessNode aNode = null;
                Command command = (Command) node.getProperty(NodeConstants.Info.ATOMIC_REQUEST);
                Object modelID = node.getProperty(NodeConstants.Info.MODEL_ID);
                if (modelID != null) {
                    String fullName = metadata.getFullName(modelID);
                    if (!capFinder.isValid(fullName)) {
                        // TODO: we ideally want to handle the partial resutls case here differently
                        // by adding a null node / and a source warning
                        // for now it's just as easy to say that the user needs to take steps to
                        // return static capabilities
                        SourceCapabilities caps = capFinder.findCapabilities(fullName);
                        Exception cause = null;
                        if (caps != null) {
                            cause = (Exception) caps.getSourceProperty(Capability.INVALID_EXCEPTION);
                        }
                        throw new QueryPlannerException(QueryPlugin.Event.TEIID30498, cause, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30498, fullName));
                    }
                }
                EvaluatableVisitor ev = null;
                if (node.hasBooleanProperty(NodeConstants.Info.IS_DEPENDENT_SET)) {
                    if (command instanceof StoredProcedure) {
                        List references = (List) node.getProperty(NodeConstants.Info.PROCEDURE_INPUTS);
                        List defaults = (List) node.getProperty(NodeConstants.Info.PROCEDURE_DEFAULTS);
                        Criteria crit = (Criteria) node.getProperty(NodeConstants.Info.PROCEDURE_CRITERIA);
                        DependentProcedureAccessNode depAccessNode = new DependentProcedureAccessNode(getID(), crit, references, defaults);
                        processNode = depAccessNode;
                        aNode = depAccessNode;
                    } else {
                        // create dependent access node
                        DependentAccessNode depAccessNode = new DependentAccessNode(getID());
                        if (modelID != null) {
                            depAccessNode.setPushdown(CapabilitiesUtil.supports(Capability.DEPENDENT_JOIN, modelID, metadata, capFinder));
                            depAccessNode.setMaxSetSize(CapabilitiesUtil.getMaxInCriteriaSize(modelID, metadata, capFinder));
                            depAccessNode.setMaxPredicates(CapabilitiesUtil.getMaxDependentPredicates(modelID, metadata, capFinder));
                            depAccessNode.setUseBindings(CapabilitiesUtil.supports(Capability.DEPENDENT_JOIN_BINDINGS, modelID, metadata, capFinder));
                            // TODO: allow the translator to drive this property
                            // simplistic check of whether this query is complex to re-execute
                            Query query = (Query) command;
                            if (query.getGroupBy() != null || query.getFrom().getClauses().size() > 1 || !(query.getFrom().getClauses().get(0) instanceof UnaryFromClause) || query.getWith() != null) {
                                depAccessNode.setComplexQuery(true);
                            } else {
                                // check to see if there in an index on at least one of the dependent sets
                                Set<GroupSymbol> groups = new HashSet<GroupSymbol>(query.getFrom().getGroups());
                                boolean found = false;
                                for (Criteria crit : Criteria.separateCriteriaByAnd(query.getCriteria())) {
                                    if (crit instanceof DependentSetCriteria) {
                                        DependentSetCriteria dsc = (DependentSetCriteria) crit;
                                        if (NewCalculateCostUtil.getKeyUsed(ElementCollectorVisitor.getElements(dsc.getExpression(), true), groups, metadata, null) != null) {
                                            found = true;
                                            break;
                                        }
                                    }
                                }
                                if (!found) {
                                    depAccessNode.setComplexQuery(true);
                                }
                            }
                        }
                        processNode = depAccessNode;
                        aNode = depAccessNode;
                    }
                    aNode.setShouldEvaluateExpressions(true);
                } else {
                    // create access node
                    aNode = new AccessNode(getID());
                    processNode = aNode;
                }
                // -- special handling for system tables. currently they cannot perform projection
                try {
                    if (command instanceof Query) {
                        processNode = correctProjectionInternalTables(node, aNode);
                    }
                } catch (QueryMetadataException err) {
                    throw new TeiidComponentException(QueryPlugin.Event.TEIID30248, err);
                }
                setRoutingName(aNode, node, command);
                boolean shouldEval = false;
                if (command instanceof Insert) {
                    Insert insert = (Insert) command;
                    if (insert.getQueryExpression() != null) {
                        insert.setQueryExpression((QueryCommand) aliasCommand(aNode, insert.getQueryExpression(), modelID));
                    } else {
                        for (int i = 0; i < insert.getValues().size(); i++) {
                            Expression ex = (Expression) insert.getValues().get(i);
                            if (!CriteriaCapabilityValidatorVisitor.canPushLanguageObject(ex, modelID, metadata, capFinder, analysisRecord)) {
                                // replace with an expression symbol to let the rewriter know that it should be replaced
                                insert.getValues().set(i, new ExpressionSymbol("x", ex));
                                shouldEval = true;
                            }
                        }
                    }
                } else if (command instanceof QueryCommand) {
                    command = aliasCommand(aNode, command, modelID);
                }
                ev = EvaluatableVisitor.needsEvaluationVisitor(modelID, metadata, capFinder);
                if (!shouldEval && modelID != null) {
                    // do a capabilities sensitive check for needs eval
                    String modelName = metadata.getFullName(modelID);
                    SourceCapabilities caps = capFinder.findCapabilities(modelName);
                    final CriteriaCapabilityValidatorVisitor capVisitor = new CriteriaCapabilityValidatorVisitor(modelID, metadata, capFinder, caps);
                    capVisitor.setCheckEvaluation(false);
                    DeepPreOrderNavigator nav = new DeepPreOrderNavigator(ev) {

                        protected void visitNode(org.teiid.query.sql.LanguageObject obj) {
                            if (capVisitor.isValid() && obj instanceof Expression) {
                                obj.acceptVisitor(capVisitor);
                            }
                            super.visitNode(obj);
                        }
                    };
                    command.acceptVisitor(nav);
                    if (!capVisitor.isValid()) {
                        // there's a non-supported construct pushed, we should eval
                        ev.evaluationNotPossible(EvaluationLevel.PROCESSING);
                    }
                } else {
                    DeepPreOrderNavigator.doVisit(command, ev);
                }
                aNode.setShouldEvaluateExpressions(ev.requiresEvaluation(EvaluationLevel.PROCESSING) || shouldEval);
                aNode.setCommand(command);
                if (modelID != null) {
                    String fullName = metadata.getFullName(modelID);
                    SourceCapabilities caps = capFinder.findCapabilities(fullName);
                    aNode.setTransactionSupport((TransactionSupport) caps.getSourceProperty(Capability.TRANSACTION_SUPPORT));
                }
                Map<GroupSymbol, PlanNode> subPlans = (Map<GroupSymbol, PlanNode>) node.getProperty(Info.SUB_PLANS);
                // it makes more sense to allow the multisource affect to be elevated above just access nodes
                if (aNode.getModelId() != null && metadata.isMultiSource(aNode.getModelId())) {
                    VDBMetaData vdb = context.getVdb();
                    // forces a rewrite
                    aNode.setShouldEvaluateExpressions(true);
                    aNode.setElements((List) node.getProperty(NodeConstants.Info.OUTPUT_COLS));
                    if (node.hasBooleanProperty(Info.IS_MULTI_SOURCE)) {
                        Expression ex = rewriteMultiSourceCommand(aNode.getCommand());
                        aNode.setConnectorBindingExpression(ex);
                        aNode.setMultiSource(true);
                    } else {
                        String sourceName = (String) node.getProperty(Info.SOURCE_NAME);
                        aNode.setConnectorBindingExpression(new Constant(sourceName));
                    }
                } else if (subPlans == null) {
                    if (!aNode.isShouldEvaluate()) {
                        aNode.minimizeProject(command);
                    }
                    // check if valid to share this with other nodes
                    if (ev != null && ev.getDeterminismLevel().compareTo(Determinism.INSTRUCTION_DETERMINISTIC) >= 0 && command.areResultsCachable()) {
                        checkForSharedSourceCommand(aNode, node);
                    }
                }
                if (subPlans != null) {
                    QueryCommand qc = (QueryCommand) command;
                    if (qc.getWith() == null) {
                        qc.setWith(new ArrayList<WithQueryCommand>(subPlans.size()));
                    }
                    Map<GroupSymbol, RelationalPlan> plans = new LinkedHashMap<GroupSymbol, RelationalPlan>();
                    for (Map.Entry<GroupSymbol, PlanNode> entry : subPlans.entrySet()) {
                        RelationalPlan subPlan = convert(entry.getValue());
                        List<ElementSymbol> elems = ResolverUtil.resolveElementsInGroup(entry.getKey(), metadata);
                        subPlan.setOutputElements(elems);
                        plans.put(entry.getKey(), subPlan);
                        WithQueryCommand withQueryCommand = new WithQueryCommand(entry.getKey(), elems, null);
                        qc.getWith().add(withQueryCommand);
                    }
                    aNode.setSubPlans(plans);
                }
            }
            break;
        case NodeConstants.Types.SELECT:
            Criteria crit = (Criteria) node.getProperty(NodeConstants.Info.SELECT_CRITERIA);
            if (!node.hasCollectionProperty(Info.OUTPUT_COLS)) {
                // the late optimization to create a dependent join from a subquery introduces
                // criteria that have no output elements set
                // TODO that should be cleaner, but the logic currently expects to be run after join implementation
                // and rerunning assign output elements seems excessive
                node.setProperty(Info.OUTPUT_COLS, node.getFirstChild().getProperty(Info.OUTPUT_COLS));
            }
            SelectNode selnode = new SelectNode(getID());
            selnode.setCriteria(crit);
            // in case the parent was a source
            selnode.setProjectedExpressions((List<Expression>) node.getProperty(NodeConstants.Info.PROJECT_COLS));
            processNode = selnode;
            break;
        case NodeConstants.Types.SORT:
        case NodeConstants.Types.DUP_REMOVE:
            if (node.getType() == NodeConstants.Types.DUP_REMOVE) {
                processNode = new DupRemoveNode(getID());
            } else {
                SortNode sortNode = new SortNode(getID());
                OrderBy orderBy = (OrderBy) node.getProperty(NodeConstants.Info.SORT_ORDER);
                if (orderBy != null) {
                    sortNode.setSortElements(orderBy.getOrderByItems());
                }
                if (node.hasBooleanProperty(NodeConstants.Info.IS_DUP_REMOVAL)) {
                    sortNode.setMode(Mode.DUP_REMOVE_SORT);
                }
                processNode = sortNode;
            }
            break;
        case NodeConstants.Types.GROUP:
            GroupingNode gnode = new GroupingNode(getID());
            gnode.setRollup(node.hasBooleanProperty(Info.ROLLUP));
            SymbolMap groupingMap = (SymbolMap) node.getProperty(NodeConstants.Info.SYMBOL_MAP);
            gnode.setOutputMapping(groupingMap);
            gnode.setRemoveDuplicates(node.hasBooleanProperty(NodeConstants.Info.IS_DUP_REMOVAL));
            List<Expression> gCols = (List) node.getProperty(NodeConstants.Info.GROUP_COLS);
            OrderBy orderBy = (OrderBy) node.getProperty(Info.SORT_ORDER);
            if (orderBy == null) {
                if (gCols != null) {
                    LinkedHashSet<Expression> exprs = new LinkedHashSet<Expression>();
                    for (Expression ex : gCols) {
                        exprs.add(SymbolMap.getExpression(ex));
                    }
                    orderBy = new OrderBy(RuleChooseJoinStrategy.createExpressionSymbols(new ArrayList<Expression>(exprs)));
                }
            } else {
                HashSet<Expression> seen = new HashSet<Expression>();
                for (int i = 0; i < gCols.size(); i++) {
                    if (i < orderBy.getOrderByItems().size()) {
                        OrderByItem orderByItem = orderBy.getOrderByItems().get(i);
                        Expression ex = SymbolMap.getExpression(orderByItem.getSymbol());
                        if (!seen.add(ex)) {
                            continue;
                        }
                        if (ex instanceof ElementSymbol) {
                            ex = groupingMap.getMappedExpression((ElementSymbol) ex);
                            // $NON-NLS-1$
                            orderByItem.setSymbol(new ExpressionSymbol("expr", ex));
                        }
                    } else {
                        // $NON-NLS-1$
                        orderBy.addVariable(new ExpressionSymbol("expr", gCols.get(i)), OrderBy.ASC);
                    }
                }
            }
            if (orderBy != null) {
                gnode.setOrderBy(orderBy.getOrderByItems());
            }
            for (Expression ex : groupingMap != null ? groupingMap.getValues() : (List<Expression>) node.getFirstChild().getProperty(NodeConstants.Info.PROJECT_COLS)) {
                if (ex instanceof AggregateSymbol) {
                    validateAggregateFunctionEvaluation((AggregateSymbol) ex);
                }
            }
            processNode = gnode;
            break;
        case NodeConstants.Types.SOURCE:
            Object source = node.getProperty(NodeConstants.Info.TABLE_FUNCTION);
            if (source instanceof XMLTable) {
                XMLTable xt = (XMLTable) source;
                XMLTableNode xtn = new XMLTableNode(getID());
                // we handle the projection filtering once here rather than repeating the
                // path analysis on a per plan basis
                updateGroupName(node, xt);
                Map<Expression, Integer> elementMap = RelationalNode.createLookupMap(xt.getProjectedSymbols());
                List cols = (List) node.getProperty(NodeConstants.Info.OUTPUT_COLS);
                int[] projectionIndexes = RelationalNode.getProjectionIndexes(elementMap, cols);
                ArrayList<XMLColumn> filteredColumns = new ArrayList<XMLColumn>(projectionIndexes.length);
                for (int col : projectionIndexes) {
                    filteredColumns.add(xt.getColumns().get(col));
                }
                xt.getXQueryExpression().useDocumentProjection(filteredColumns, analysisRecord);
                xtn.setProjectedColumns(filteredColumns);
                xtn.setTable(xt);
                processNode = xtn;
                break;
            }
            if (source instanceof ObjectTable) {
                ObjectTable ot = (ObjectTable) source;
                ObjectTableNode otn = new ObjectTableNode(getID());
                // we handle the projection filtering once here rather than repeating the
                // path analysis on a per plan basis
                updateGroupName(node, ot);
                Map<Expression, Integer> elementMap = RelationalNode.createLookupMap(ot.getProjectedSymbols());
                List<Expression> cols = (List<Expression>) node.getProperty(NodeConstants.Info.OUTPUT_COLS);
                int[] projectionIndexes = RelationalNode.getProjectionIndexes(elementMap, cols);
                ArrayList<ObjectColumn> filteredColumns = new ArrayList<ObjectColumn>(projectionIndexes.length);
                for (int col : projectionIndexes) {
                    filteredColumns.add(ot.getColumns().get(col));
                }
                otn.setProjectedColumns(filteredColumns);
                otn.setTable(ot);
                processNode = otn;
                break;
            }
            if (source instanceof TextTable) {
                TextTableNode ttn = new TextTableNode(getID());
                TextTable tt = (TextTable) source;
                updateGroupName(node, tt);
                ttn.setTable(tt);
                processNode = ttn;
                break;
            }
            if (source instanceof ArrayTable) {
                ArrayTableNode atn = new ArrayTableNode(getID());
                ArrayTable at = (ArrayTable) source;
                updateGroupName(node, at);
                atn.setTable(at);
                processNode = atn;
                break;
            }
            SymbolMap symbolMap = (SymbolMap) node.getProperty(NodeConstants.Info.SYMBOL_MAP);
            if (symbolMap != null) {
                PlanNode child = node.getLastChild();
                if (child.getType() == NodeConstants.Types.PROJECT || child.getType() == NodeConstants.Types.SELECT) {
                    // update the project cols based upon the original output
                    child.setProperty(NodeConstants.Info.PROJECT_COLS, child.getProperty(NodeConstants.Info.OUTPUT_COLS));
                }
                if (child.getType() != NodeConstants.Types.SET_OP || child.getProperty(Info.SET_OPERATION) == Operation.UNION) {
                    child.setProperty(NodeConstants.Info.OUTPUT_COLS, node.getProperty(NodeConstants.Info.OUTPUT_COLS));
                } else {
                    // else we cannot directly update the child properties as the child will get converted to a join
                    // create a projection instead for initialization purposes, but won't impact performance
                    ProjectNode pNode = new ProjectNode(getID());
                    pNode.setSelectSymbols((List<? extends Expression>) child.getProperty(NodeConstants.Info.OUTPUT_COLS));
                    return prepareToAdd(node, pNode);
                }
            }
            return null;
        case NodeConstants.Types.SET_OP:
            Operation setOp = (Operation) node.getProperty(NodeConstants.Info.SET_OPERATION);
            boolean useAll = ((Boolean) node.getProperty(NodeConstants.Info.USE_ALL)).booleanValue();
            if (setOp == Operation.UNION) {
                RelationalNode unionAllNode = new UnionAllNode(getID());
                if (useAll) {
                    processNode = unionAllNode;
                } else {
                    boolean onlyDupRemoval = node.hasBooleanProperty(NodeConstants.Info.IS_DUP_REMOVAL);
                    if (onlyDupRemoval) {
                        processNode = new DupRemoveNode(getID());
                    } else {
                        SortNode sNode = new SortNode(getID());
                        sNode.setMode(Mode.DUP_REMOVE_SORT);
                        processNode = sNode;
                    }
                    unionAllNode.setElements((List) node.getProperty(NodeConstants.Info.OUTPUT_COLS));
                    processNode.addChild(unionAllNode);
                }
            } else {
                JoinNode joinAsSet = new JoinNode(getID());
                joinAsSet.setJoinStrategy(new MergeJoinStrategy(SortOption.SORT_DISTINCT, SortOption.SORT_DISTINCT, true));
                // If we push these sorts, we will have to enforce null order, since nulls are equal here
                List leftExpressions = (List) node.getFirstChild().getProperty(NodeConstants.Info.OUTPUT_COLS);
                List rightExpressions = (List) node.getLastChild().getProperty(NodeConstants.Info.OUTPUT_COLS);
                joinAsSet.setJoinType(setOp == Operation.EXCEPT ? JoinType.JOIN_ANTI_SEMI : JoinType.JOIN_SEMI);
                joinAsSet.setJoinExpressions(leftExpressions, rightExpressions);
                processNode = joinAsSet;
            }
            break;
        case NodeConstants.Types.TUPLE_LIMIT:
            Expression rowLimit = (Expression) node.getProperty(NodeConstants.Info.MAX_TUPLE_LIMIT);
            Expression offset = (Expression) node.getProperty(NodeConstants.Info.OFFSET_TUPLE_COUNT);
            LimitNode ln = new LimitNode(getID(), rowLimit, offset);
            ln.setImplicit(node.hasBooleanProperty(Info.IS_IMPLICIT_LIMIT));
            processNode = ln;
            break;
        case NodeConstants.Types.NULL:
            processNode = new NullNode(getID());
            break;
        default:
            throw new QueryPlannerException(QueryPlugin.Event.TEIID30250, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30250, NodeConstants.getNodeTypeString(node.getType())));
    }
    if (processNode != null) {
        processNode = prepareToAdd(node, processNode);
    }
    return processNode;
}

Example 3 with EvaluatableVisitor

use of org.teiid.query.sql.visitor.EvaluatableVisitor in project teiid by teiid.

the class CriteriaCapabilityValidatorVisitor method canPushLanguageObject.

public static boolean canPushLanguageObject(LanguageObject obj, Object modelID, final QueryMetadataInterface metadata, CapabilitiesFinder capFinder, AnalysisRecord analysisRecord, boolean isJoin, boolean isSelectClause, final boolean multiValuedReferences) throws QueryMetadataException, TeiidComponentException {
    if (obj == null) {
        return true;
    }
    if (modelID == null || metadata.isVirtualModel(modelID)) {
        // Couldn't determine model ID, so give up
        return false;
    }
    String modelName = metadata.getFullName(modelID);
    SourceCapabilities caps = capFinder.findCapabilities(modelName);
    if (caps == null) {
        // this doesn't seem right, but tests were expecting it...
        return true;
    }
    CriteriaCapabilityValidatorVisitor visitor = new CriteriaCapabilityValidatorVisitor(modelID, metadata, capFinder, caps);
    visitor.setCheckEvaluation(!multiValuedReferences);
    visitor.analysisRecord = analysisRecord;
    visitor.isJoin = isJoin;
    visitor.isSelectClause = isSelectClause;
    // we use an array to represent multiple comparision attributes,
    // but we don't want that to inhibit pushdown as we'll account for that later
    // in criteria processing
    final EvaluatableVisitor ev = new EvaluatableVisitor(modelID, metadata, capFinder);
    PreOrPostOrderNavigator nav = new PreOrPostOrderNavigator(visitor, PreOrPostOrderNavigator.POST_ORDER, false) {

        @Override
        public void visit(DependentSetCriteria obj1) {
            if (obj1.hasMultipleAttributes()) {
                Array array = (Array) obj1.getExpression();
                visitNodes(array.getExpressions());
                super.postVisitVisitor(obj1);
            } else {
                super.visit(obj1);
            }
        }

        @Override
        protected void visitNode(LanguageObject obj) {
            if (obj == null) {
                return;
            }
            Determinism d = ev.getDeterminismLevel();
            boolean pushDown = ev.requiresEvaluation(EvaluationLevel.PUSH_DOWN);
            // decend with clean state, then restore
            ev.reset();
            super.visitNode(obj);
            ev.setDeterminismLevel(d);
            if (pushDown) {
                ev.evaluationNotPossible(EvaluationLevel.PUSH_DOWN);
            }
        }

        @Override
        protected void visitVisitor(LanguageObject obj) {
            if (obj == null) {
                return;
            }
            if (!ev.requiresEvaluation(EvaluationLevel.PUSH_DOWN) && ev.getDeterminismLevel() != Determinism.NONDETERMINISTIC) {
                if (obj instanceof ElementSymbol) {
                    ElementSymbol es = (ElementSymbol) obj;
                    if (es.getMetadataID() != null) {
                        try {
                            if (metadata.isMultiSourceElement(es.getMetadataID())) {
                                // no need to visit
                                return;
                            }
                        } catch (QueryMetadataException e) {
                        } catch (TeiidComponentException e) {
                        }
                    }
                }
                obj.acceptVisitor(ev);
                if (!multiValuedReferences && obj instanceof Expression) {
                    if (obj instanceof Function) {
                        if (!(obj instanceof AggregateSymbol)) {
                            Function f = (Function) obj;
                            if (f.getFunctionDescriptor().getPushdown() != PushDown.MUST_PUSHDOWN && f.getFunctionDescriptor().getDeterministic() != Determinism.NONDETERMINISTIC) {
                                // don't need to consider
                                return;
                            }
                        }
                    } else if (obj instanceof Criteria && !(obj instanceof SubqueryContainer) && !(obj instanceof DependentSetCriteria)) {
                        // don't need to consider
                        return;
                    }
                }
            }
            super.visitVisitor(obj);
        }
    };
    obj.acceptVisitor(nav);
    if (visitor.getException() != null) {
        throw visitor.getException();
    }
    return visitor.isValid();
}