Relative date targeting for feature flags / surveys

[neilkakkar]

Is your feature request related to a problem?

I want to target a relative date, say, if I want users to see a survey only 7 days after account creation.

I currently can't do this easily because relative date operations aren't supported in flag matching: I can only choose static dates.

Please describe.

Describe the solution you'd like

Create a relative date operator for flag matching

Describe alternatives you've considered

Additional context

https://posthogusers.slack.com/archives/C01GLBKHKQT/p1693469440070429

https://posthoghelp.zendesk.com/agent/tickets/5728

Thank you for your feature request – we love each and every one!

[lsmith77]

if its tricky to add generic function support, maybe there could be a quick fix for a limited set of date "functions" as operators? ie.

field: created_at
operator: older_than_days
value: 7

More ideal of course would be something like

field: DATEDIFF(created_at, NOW)
operator: > (greater than)
value: 7