I have a user defined function AGG for generic aggregation used in underlying layer, use it in sql will be fine (select sales_date, AGG(sales_qty) as qty from SALE), howeve when I use it in expression (e.g. AGG([sales_qty])) I will get error: Unknown function AGG.
can I register my own list of UDF to eliminate this error? or just make it warning so use can bypass it if they want?
Thanks
Boris Yang