/// <summary>
/// Returns null when a filter cannot be applied, and a collection iterator must be used instead.
/// Returns best-effort matching events otherwise which should still be run through any filter expressions.
/// </summary>
private ICollection <EventBean> SnapshotNullWhenNoIndex(FilterSpecCompiled filter, Attribute[] annotations, ExprNode optionalWhereClause, AgentInstanceContext agentInstanceContext)
{
// return null when filter cannot be applies
return(FireAndForgetQueryExec.Snapshot(filter, annotations, null,
_instance.IndexRepository, _instance.TableMetadata.IsQueryPlanLogging,
TableServiceImpl.QueryPlanLog, _instance.TableMetadata.TableName,
_instance.AgentInstanceContext));
}
/// <summary>
/// Return a snapshot using index lookup filters.
/// </summary>
/// <param name="optionalFilter">to index lookup</param>
/// <returns>events</returns>
public ICollection <EventBean> Snapshot(FilterSpecCompiled optionalFilter, Attribute[] annotations)
{
VirtualDWView virtualDataWindow = null;
if (IsVirtualDataWindow)
{
virtualDataWindow = VirtualDataWindow;
}
return(FireAndForgetQueryExec.Snapshot(optionalFilter, annotations, virtualDataWindow,
_indexRepository, _rootView.IsQueryPlanLogging, NamedWindowRootView.QueryPlanLog,
_rootView.EventType.Name, _agentInstanceContext));
}
/// <summary>
/// Return a snapshot using index lookup filters.
/// </summary>
/// <param name="annotations">annotations</param>
/// <param name="queryGraph">query graph</param>
/// <returns>events</returns>
public ICollection<EventBean> Snapshot(
QueryGraph queryGraph,
Attribute[] annotations)
{
VirtualDWView virtualDataWindow = null;
if (IsVirtualDataWindow) {
virtualDataWindow = VirtualDataWindow;
}
return FireAndForgetQueryExec.Snapshot(
queryGraph,
annotations,
virtualDataWindow,
IndexRepository,
rootView.EventType.Name,
AgentInstanceContext);
}
