Trait diesel::expression::MixedAggregates
source · pub trait MixedAggregates<Other> {
type Output;
}
Expand description
Can two IsAggregate
types appear in the same expression?
You should never implement this trait. It will eventually become a trait alias.
is_aggregate::Yes
and is_aggregate::No
can only appear with
themselves or is_aggregate::Never
. is_aggregate::Never
can appear
with anything.