Dashboard variable query

the datasource can be used to query dashboard variables, these dashboard variables are available to use in most places in the query editor available query types measurement asset event type database event type property asset property event property values most query filters can also use other dashboard variables, so for example the asset property query could use another dashboard variable of type asset measurement query filter measurement filters the measurements by name, allows regular expressions (must be surrounded by '/') filter by database by default measurements from all time series databases are accessible to query, one or more databases can be selected to filter on filter datatypes by default measurements of all datatypes are accessible to query, one or more datatypes can be selected to filter on asset query filter by asset path filters assets by asset path, allows regular expressions (must be surrounded by '/') parent assets filter assets by (direct) parent assets, or assets without parent assets use asset path can be toggled to use the asset path instead of the asset name when displaying the asset in the dashboard variable dropdown event type query filter event type filters the event type by name, allows regular expressions (must be surrounded by '/') database query filter database filters the database by name, allows regular expressions (must be surrounded by '/') event type property query filter by event types select one or more event type(s) to show the properties for property types optionally select a property type to filter on, simple , periodic or periodic with dimension datatype select one or more datatypes to filter on, by default all datatypes are selected asset property query assets select for which asset(s) to show asset properties for filter by keyword filters the asset properties by name or description, allows regular expressions (must be surrounded by '/') filter by datatype filters the asset properties by datatype, allows multiple datatypes to be selected by default all datatypes are selected event property values query uses the same query editor as the events query, returns the distinct values for the selected event property of the events that match the query