udaf_default_return_field

datafusion::logical_expr

Function udaf_default_return_field 

Source 
pub fn udaf_default_return_field<F>(
    func: &F,
    arg_fields: &[Arc<Field>],
) -> Result<Arc<Field>, DataFusionError>
where
    F: AggregateUDFImpl + ?Sized,
Expand description

Encapsulates default implementation of AggregateUDFImpl::return_field.