Struct datafusion::physical_plan::udaf::AggregateUDF
source · [−]pub struct AggregateUDF {
pub name: String,
pub signature: Signature,
pub return_type: Arc<dyn Fn(&[DataType]) + Send + Sync + 'static>,
pub accumulator: Arc<dyn Fn() + Send + Sync + 'static>,
pub state_type: Arc<dyn Fn(&DataType) + Send + Sync + 'static>,
}
Expand description
Logical representation of a user-defined aggregate function (UDAF) A UDAF is different from a UDF in that it is stateful across batches.
Fields
name: String
name
signature: Signature
signature
return_type: Arc<dyn Fn(&[DataType]) + Send + Sync + 'static>
Return type
accumulator: Arc<dyn Fn() + Send + Sync + 'static>
actual implementation
state_type: Arc<dyn Fn(&DataType) + Send + Sync + 'static>
the accumulator’s state’s description as a function of the return type
Implementations
Trait Implementations
sourceimpl Clone for AggregateUDF
impl Clone for AggregateUDF
sourcefn clone(&self) -> AggregateUDF
fn clone(&self) -> AggregateUDF
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl Debug for AggregateUDF
impl Debug for AggregateUDF
sourceimpl Hash for AggregateUDF
impl Hash for AggregateUDF
sourceimpl PartialEq<AggregateUDF> for AggregateUDF
impl PartialEq<AggregateUDF> for AggregateUDF
Auto Trait Implementations
impl !RefUnwindSafe for AggregateUDF
impl Send for AggregateUDF
impl Sync for AggregateUDF
impl Unpin for AggregateUDF
impl !UnwindSafe for AggregateUDF
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> CallHasher for T where
T: Hash + ?Sized,
impl<T> CallHasher for T where
T: Hash + ?Sized,
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcefn clone_into(&self, target: &mut T)
fn clone_into(&self, target: &mut T)
🔬 This is a nightly-only experimental API. (
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more