pub trait AggregatePolicy<D>: Numeric {
type Sum: DataType;
type Avg: DataType;
}Expand description
Dialect-specific aggregate output mapping.
Keeps aggregate output typing in one place so all aggregate functions follow the same per-dialect policy.
Required Associated Types§
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.