getValueHistory - Input Items

In this section, you can find the descriptions of the input items for getValueHistory operation depending on the value you select on the General tab.

If you select the getValueHistory operation, the following input items are available:

Input Item	Data Type	Required	Description
`Tag`	String	Yes	The name of the tag that you want to retrieve.
`StartTime`	String	No	The starting time for filtering results. If you do not specify the value, `"*"` is filled in this field, which means the current date and time.
`EndTime`	String	No	The end time for filtering results.
`Count`	String	No	The number of values that you want to retrieve.
`isForward`	Integer	No	The attribute that determines the timestamp range for retrieving in relation to the specified `startTime`: If it is set to `false()`, tag values with timestamps that are less recent than the specified `startTime` are retrieved. The tag value are returned in time descending order. If it is set to `true()`, tag values with timestamps that are more recent than the specified `startTime` are retrieved. If you do not specify the value, `false()` is filled in this field by default.
`boundaryType`	Boolean	No	The attribute that determines which values are returned in relation to the requested time boundaries. Supported boundary types in this plug-in are `Inside`, `Outside`, and `Interpolated`. If you do not specify the value, `Inside` is filled in this field by default.

Note: The filterExp option is not supported in the JDBC Query activity.