I have started using a data source from BigQuery but soon came up against the limitation where you cannot use related values to look up records in BQ. I have however managed to use the Connected Sheet function in Google Sheets to get to the data source and have extracted that data set to a seperate sheet. This Google sheet is linked to my app and I am seeing full lookup etc.
My question is has anyone else used this method and should I be wary of any gotch yas?