public override OnExprViewResult DetermineOnExprView(AgentInstanceContext agentInstanceContext, IList <StopCallback> stopCallbacks, bool isRecoveringResilient)
{
// get result set processor and aggregation services
Pair <ResultSetProcessor, AggregationService> pair = EPStatementStartMethodHelperUtil.StartResultSetAndAggregation(_resultSetProcessorPrototype, agentInstanceContext, false, null);
// get named window processor instance
NamedWindowProcessorInstance processorInstance = _processor.GetProcessorInstance(agentInstanceContext);
// obtain on-expr view
EventTable[] indexes = null;
if (_queryPlan.IndexDescs != null)
{
indexes = SubordinateQueryPlannerUtil.RealizeTables(
_queryPlan.IndexDescs,
_processor.NamedWindowType,
processorInstance.RootViewInstance.IndexRepository,
processorInstance.RootViewInstance.DataWindowContents,
processorInstance.TailViewInstance.AgentInstanceContext,
isRecoveringResilient);
}
SubordWMatchExprLookupStrategy strategy = _queryPlan.Factory.Realize(indexes, agentInstanceContext, processorInstance.RootViewInstance.DataWindowContents, processorInstance.RootViewInstance.VirtualDataWindow);
NamedWindowOnExprBaseView onExprBaseView = _onExprFactory.Make(strategy, processorInstance.RootViewInstance, agentInstanceContext, pair.First);
return(new OnExprViewResult(onExprBaseView, pair.Second));
}
public SubSelectStrategyRealization Instantiate(
EPServicesContext services,
Viewable viewableRoot,
AgentInstanceContext agentInstanceContext,
IList <StopCallback> stopCallbackList,
int subqueryNumber,
bool isRecoveringResilient)
{
SubselectAggregationPreprocessorBase subselectAggregationPreprocessor = null;
AggregationService aggregationService = null;
if (_aggregationServiceFactory != null)
{
aggregationService = _aggregationServiceFactory.AggregationServiceFactory.MakeService(
agentInstanceContext, agentInstanceContext.StatementContext.EngineImportService, true, subqueryNumber);
if (_groupByKeys == null)
{
if (_filterExprEval == null)
{
subselectAggregationPreprocessor =
new SubselectAggregationPreprocessorUnfilteredUngrouped(
aggregationService, _filterExprEval, null);
}
else
{
subselectAggregationPreprocessor =
new SubselectAggregationPreprocessorFilteredUngrouped(aggregationService, _filterExprEval, null);
}
}
else
{
if (_filterExprEval == null)
{
subselectAggregationPreprocessor =
new SubselectAggregationPreprocessorUnfilteredGrouped(
aggregationService, _filterExprEval, _groupByKeys);
}
else
{
subselectAggregationPreprocessor =
new SubselectAggregationPreprocessorFilteredGrouped(
aggregationService, _filterExprEval, _groupByKeys);
}
}
}
SubordTableLookupStrategy subqueryLookup;
if (_optionalNamedWindowProcessor != null)
{
NamedWindowProcessorInstance instance =
_optionalNamedWindowProcessor.GetProcessorInstance(agentInstanceContext);
if (_queryPlan == null)
{
if (instance.RootViewInstance.IsQueryPlanLogging && NamedWindowRootView.QueryPlanLog.IsInfoEnabled)
{
NamedWindowRootView.QueryPlanLog.Info("shared, full table scan");
}
subqueryLookup =
new SubordFullTableScanLookupStrategyLocking(
instance.RootViewInstance.DataWindowContents,
agentInstanceContext.EpStatementAgentInstanceHandle.StatementAgentInstanceLock);
}
else
{
EventTable[] tables = null;
if (!_optionalNamedWindowProcessor.IsVirtualDataWindow)
{
tables = SubordinateQueryPlannerUtil.RealizeTables(
_queryPlan.IndexDescs, instance.RootViewInstance.EventType,
instance.RootViewInstance.IndexRepository,
instance.RootViewInstance.DataWindowContents, agentInstanceContext,
isRecoveringResilient);
}
SubordTableLookupStrategy strategy = _queryPlan.LookupStrategyFactory.MakeStrategy(
tables, instance.RootViewInstance.VirtualDataWindow);
subqueryLookup = new SubordIndexedTableLookupStrategyLocking(
strategy, instance.TailViewInstance.AgentInstanceContext.AgentInstanceLock);
}
}
else
{
TableStateInstance state = _tableService.GetState(
_optionalTableMetadata.TableName, agentInstanceContext.AgentInstanceId);
ILockable iLock = agentInstanceContext.StatementContext.IsWritesToTables
? state.TableLevelRWLock.WriteLock
: state.TableLevelRWLock.ReadLock;
if (_queryPlan == null)
{
subqueryLookup = new SubordFullTableScanTableLookupStrategy(iLock, state.IterableTableScan);
}
else
{
EventTable[] indexes = new EventTable[_queryPlan.IndexDescs.Length];
for (int i = 0; i < indexes.Length; i++)
{
indexes[i] = state.IndexRepository.GetIndexByDesc(_queryPlan.IndexDescs[i].IndexMultiKey);
}
subqueryLookup = _queryPlan.LookupStrategyFactory.MakeStrategy(indexes, null);
subqueryLookup = new SubordIndexedTableLookupTableStrategy(subqueryLookup, iLock);
}
}
return(new SubSelectStrategyRealization(
subqueryLookup, subselectAggregationPreprocessor, aggregationService,
Collections.GetEmptyMap <ExprPriorNode, ExprPriorEvalStrategy>(),
Collections.GetEmptyMap <ExprPreviousNode, ExprPreviousEvalStrategy>(),
null, null));
}