How can I define a pair of field filters for a report, where both filters refer to the same joined table but the table is joined more than once?
Example: let's say we have an airport system, with a fact table called "arrivals", with "airport_from_id" and "airport_to_id" columns, both referring the dimension table named "airports".
So the query for the report would be something like:
JOIN airports as airport_from ON arrivals.port_from_id = airport_from.id
JOIN airports as airport_to ON arrivals.port_to_id = airport_to.id
I need to create a Field Filter for airport_from and another (independent) Field Filter for airport_to. However, it is not possible to create a Field Filter based on an aliased table, and I cannot use the same table more than once in a query without using aliases.
Catch 22 or am I missing something?
Any hints welcome.