Support for FILTER clause in aggregate expressions
remeike opened this issue · comments
So it looks like Opaleye supports ORDER BY clauses in aggregate expressions with the orderAggregate function. I wonder if it would be possible to have support for FILTER clauses (4.2.7.) in aggregate expressions as well?
I imagine the type could look like: filterAggregate :: (a -> Column SqlBool) -> Aggregator a b -> Aggregator a b
Very nice idea! I didn't even know FILTER existed until now. Regrettably I don't think I'll have time to work on this in the near future but happy to advise anyone who wants to work on it.