[Feature Request] Legend variables

[orenwolf]

We have many instances of Prometheus as a data source, pulling in integer values for items like an event ID or userid.

These IDs map to human-readable names in a SQL data source (which we also have configured in grafana)

While we can use grafana variables to, for example, provide a dropdown to modify the graph query by friendly name (if, for example, we wanted to filter on an ID, the legend does not appear to be alterable when we aren't filtering, so we end up with integers in the legend instead of the __text value of the variable names.

It would be wondrous if we could use a variable for the legend in such a way that the __text value from the variable, rather than the raw value, appeared in the legend.

Thanks!

[hugohaggmark]

/duplicate #1032

[grafanabot]

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