Package com.inductiveautomation.ignition.gateway.sqltags.history

Interface TagHistoryQueryInterface

All Superinterfaces:

AnnotationQueryProvider

All Known Subinterfaces:

TagHistoryProvider

All Known Implementing Classes:

HistorianProvider, InternalHistorianProvider, InternalHistorianProviderType.EdgeHistorian, RemoteHistorianProvider, SimulatorHistorianProvider, TagHistoryProvider, TagHistorySplitterProvider

public interface TagHistoryQueryInterface
extends AnnotationQueryProvider

This interface shares some functions with TagHistoryProvider. It is the minimum set of functions that are used to query tag history from a provider.

Method Summary

Modifier and Type	Method	Description
HistoryQueryExecutor	createQuery(java.util.List<ColumnQueryDefinition> paths, QueryController controller)
default java.util.List<Aggregate>	getAvailableAggregates()	Returns a list of aggregate functions that can be used with the server.
TimelineSet	queryDensity(java.util.List<QualifiedPath> paths, java.util.Date start, java.util.Date end, java.lang.String queryId)

Methods inherited from interface com.inductiveautomation.ignition.gateway.sqltags.history.AnnotationQueryProvider

queryAnnotations

Method Detail

getAvailableAggregates

default java.util.List<Aggregate> getAvailableAggregates()

Returns a list of aggregate functions that can be used with the server. Only expected to be valid if the server is enabled and available. Also, should only return null if the aggregates can not be retrieved for some reason. If the server simply does not support any aggregate functions, an empty list should be returned.

createQuery

HistoryQueryExecutor createQuery(java.util.List<ColumnQueryDefinition> paths,
                                 QueryController controller)

queryDensity

TimelineSet queryDensity(java.util.List<QualifiedPath> paths,
                         java.util.Date start,
                         java.util.Date end,
                         java.lang.String queryId)
                  throws java.lang.Exception

Throws:

java.lang.Exception