Whats missing is the length of array function in the expression editor.
The get from index function is also missing.
However, would the “Get length” trigger be an issue? This should work as intended?
@Beth
Richard wants to check on an Aggegation, not on a query. The Query could have multiple results, where the unique Aggregation deliveres only one.
There is no “count unique” aggregation.
Or did I get the idea wrong?
About the performance, I’m not sure. The Aggregation should always be updated, when touched or referenced?!
It behaves different than regular arrays (e.g. you can’t manipulate them).