I’m tagging this as a bug and a feature, as I’m not sure which it is haha.
I’ve noticed that although this is not in the documentation anywhere, you can limit faceting to certain values by using IN:
SELECT count(*) FROM PageAction FACET appName IN ('App 1', 'App 2', 'App 4')
I find this useful so I wouldn’t mind it being recognized as a valid use. The alternative, which was just released recently is filtering. So the same query could be:
SELECT filter(count(*), appName = 'App 1'), filter(count(*), appName = 'App 2'), filter(count(*), appName = 'App 4'), FROM PageAction