[−][src]Struct datafusion::physical_plan::distinct_expressions::DistinctCount
Expression for a COUNT(DISTINCT) aggregation.
Implementations
impl DistinctCount[src]
pub fn new(
input_data_types: Vec<DataType>,
exprs: Vec<Arc<dyn PhysicalExpr>>,
name: String,
data_type: DataType
) -> Self[src]
input_data_types: Vec<DataType>,
exprs: Vec<Arc<dyn PhysicalExpr>>,
name: String,
data_type: DataType
) -> Self
Create a new COUNT(DISTINCT) aggregate function.
Trait Implementations
impl AggregateExpr for DistinctCount[src]
fn field(&self) -> Result<Field>[src]
fn state_fields(&self) -> Result<Vec<Field>>[src]
fn expressions(&self) -> Vec<Arc<dyn PhysicalExpr>>[src]
fn create_accumulator(&self) -> Result<Rc<RefCell<dyn Accumulator>>>[src]
impl Debug for DistinctCount[src]
Auto Trait Implementations
impl !RefUnwindSafe for DistinctCount
impl Send for DistinctCount
impl Sync for DistinctCount
impl Unpin for DistinctCount
impl !UnwindSafe for DistinctCount
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T[src]
impl<T> From<T> for T[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,