private static AggregationServiceForgeDesc[] PlanAggregations( IList<ExprAggregateNode> measureAggregateExprNodes, StreamTypeService compositeTypeServiceMeasure, string[] allStreamNames, EventType[] allTypes, IOrderedDictionary<int, string> streamVariables, ISet<string> variablesMultiple, StatementBaseInfo @base, StatementCompileTimeServices services) { IDictionary<int, IList<ExprAggregateNode>> measureExprAggNodesPerStream = new Dictionary<int, IList<ExprAggregateNode>>(); foreach (var aggregateNode in measureAggregateExprNodes) { // validate node and params var count = 0; var visitor = new ExprNodeIdentifierVisitor(true); var isIStreamOnly = new bool[allStreamNames.Length]; var typeServiceAggregateMeasure = new StreamTypeServiceImpl( allTypes, allStreamNames, isIStreamOnly, false, true); var validationContext = new ExprValidationContextBuilder(typeServiceAggregateMeasure, @base.StatementRawInfo, services) .WithAllowBindingConsumption(true) .Build(); aggregateNode.ValidatePositionals(validationContext); if (aggregateNode.OptionalLocalGroupBy != null) { throw new ExprValidationException( "Match-recognize does not allow aggregation functions to specify a group-by"); } foreach (var child in aggregateNode.ChildNodes) { var validated = ExprNodeUtilityValidate.GetValidatedSubtree( ExprNodeOrigin.MATCHRECOGMEASURE, child, validationContext); validated.Accept(visitor); aggregateNode.SetChildNode(count++, new ExprNodeValidated(validated)); } // verify properties used within the aggregation ISet<int> aggregatedStreams = new HashSet<int>(); foreach (var pair in visitor.ExprProperties) { aggregatedStreams.Add(pair.First); } int? multipleVarStream = null; foreach (var streamNumAggregated in aggregatedStreams) { var variable = streamVariables.Get(streamNumAggregated); if (variablesMultiple.Contains(variable)) { if (multipleVarStream == null) { multipleVarStream = streamNumAggregated; continue; } throw new ExprValidationException( "Aggregation functions in the measure-clause must only refer to properties of exactly one group variable returning multiple events"); } } if (multipleVarStream == null) { throw new ExprValidationException( "Aggregation functions in the measure-clause must refer to one or more properties of exactly one group variable returning multiple events"); } var aggNodesForStream = measureExprAggNodesPerStream.Get(multipleVarStream.Value); if (aggNodesForStream == null) { aggNodesForStream = new List<ExprAggregateNode>(); measureExprAggNodesPerStream.Put(multipleVarStream.Value, aggNodesForStream); } aggNodesForStream.Add(aggregateNode); } // validate aggregation itself foreach (var entry in measureExprAggNodesPerStream) { foreach (var aggregateNode in entry.Value) { var validationContext = new ExprValidationContextBuilder( compositeTypeServiceMeasure, @base.StatementRawInfo, services) .WithAllowBindingConsumption(true) .WithMemberName(new ExprValidationMemberNameQualifiedRowRecogAgg(entry.Key)) .Build(); aggregateNode.Validate(validationContext); } } // get aggregation service per variable var aggServices = new AggregationServiceForgeDesc[allStreamNames.Length]; var declareds = Arrays.AsList(@base.StatementSpec.DeclaredExpressions); foreach (var entry in measureExprAggNodesPerStream) { EventType[] typesPerStream = {allTypes[entry.Key]}; AggregationServiceForgeDesc desc = AggregationServiceFactoryFactory.GetService( entry.Value, EmptyDictionary<ExprNode, string>.Instance, declareds, new ExprNode[0], null, EmptyList<ExprAggregateNode>.Instance, EmptyList<ExprAggregateNode>.Instance, EmptyList<ExprAggregateNodeGroupKey>.Instance, false, @base.StatementRawInfo.Annotations, services.VariableCompileTimeResolver, true, null, null, typesPerStream, null, @base.ContextName, null, services.TableCompileTimeResolver, false, true, false, services.ImportServiceCompileTime, @base.StatementRawInfo, services.SerdeResolver); aggServices[entry.Key] = desc; } return aggServices; }
public void Attach(EventType parentEventType, StatementContext statementContext, ViewFactory optionalParentFactory, IList <ViewFactory> parentViewFactories) { _eventType = parentEventType; // define built-in fields var builtinTypeDef = ExpressionViewOAFieldEnumExtensions.AsMapOfTypes(_eventType); _builtinMapType = statementContext.EventAdapterService.CreateAnonymousObjectArrayType( statementContext.StatementId + "_exprview", builtinTypeDef); StreamTypeService streamTypeService = new StreamTypeServiceImpl(new EventType[] { _eventType, _builtinMapType }, new String[2], new bool[2], statementContext.EngineURI, false); // validate expression ExpiryExpression = ViewFactorySupport.ValidateExpr(ViewName, statementContext, ExpiryExpression, streamTypeService, 0); var summaryVisitor = new ExprNodeSummaryVisitor(); ExpiryExpression.Accept(summaryVisitor); if (summaryVisitor.HasSubselect || summaryVisitor.HasStreamSelect || summaryVisitor.HasPreviousPrior) { throw new ViewParameterException("Invalid expiry expression: Sub-select, previous or prior functions are not supported in this context"); } var returnType = ExpiryExpression.ExprEvaluator.ReturnType; if (returnType.GetBoxedType() != typeof(bool?)) { throw new ViewParameterException("Invalid return value for expiry expression, expected a bool return value but received " + returnType.GetParameterAsString()); } // determine variables used, if any var visitor = new ExprNodeVariableVisitor(); ExpiryExpression.Accept(visitor); VariableNames = visitor.VariableNames; // determine aggregation nodes, if any var aggregateNodes = new List <ExprAggregateNode>(); ExprAggregateNodeUtil.GetAggregatesBottomUp(ExpiryExpression, aggregateNodes); if (aggregateNodes.IsNotEmpty()) { try { AggregationServiceFactoryDesc = AggregationServiceFactoryFactory.GetService( Collections.GetEmptyList <ExprAggregateNode>(), Collections.GetEmptyMap <ExprNode, String>(), Collections.GetEmptyList <ExprDeclaredNode>(), null, aggregateNodes, Collections.GetEmptyList <ExprAggregateNode>(), Collections.GetEmptyList <ExprAggregateNodeGroupKey>(), false, statementContext.Annotations, statementContext.VariableService, false, false, null, null, AggregationServiceFactoryServiceImpl.DEFAULT_FACTORY, streamTypeService.EventTypes, statementContext.MethodResolutionService, null, statementContext.ContextName, null, null); } catch (ExprValidationException ex) { throw new ViewParameterException(ex.Message, ex); } } }