Is there a way, or a proposal, to limit the columns returned by a read request? I want to automatically refresh the writeLevel value of all points, in order to display the overrides in a hierarchy. However, a read filter "point and writeLevel" returns all columns for all points, which is a ton of data, and the device license limits the amount of data that is allowed to be transferred each month.
The device DB supports the Axon lang, so I'll use it for now to filter the returned columns, but I would really prefer an Haystack-native solution, for the solution to be generic and not dependent on Axon.
Ideally, a read request could support both filter, limit and tags as input columns, with the later being a comma-separated list of tags to be included in the response (or all tags if not specified).
Aurelien Ribon Sun 1 Dec
Hello,
Is there a way, or a proposal, to limit the columns returned by a read request? I want to automatically refresh the writeLevel value of all points, in order to display the overrides in a hierarchy. However, a read filter "point and writeLevel" returns all columns for all points, which is a ton of data, and the device license limits the amount of data that is allowed to be transferred each month.
The device DB supports the Axon lang, so I'll use it for now to filter the returned columns, but I would really prefer an Haystack-native solution, for the solution to be generic and not dependent on Axon.
Ideally, a read request could support both filter, limit and tags as input columns, with the later being a comma-separated list of tags to be included in the response (or all tags if not specified).