Does exposed allow something of a "client-side type interceptor" (a function that would be called when data is retrieved from DB or inserted into and that would change its data type)? I have legacy DB with structure I cannot alter and there are lots of columns defined as decimal(x, 0) where x is in the majority of cases <= 9 (so it could fit into Int without problem). I would like to transparently convert it upon fetching/writing.

There are a few options.

Isn’t this just done using a repository pattern in front of the actual data access?