[−][src]Struct datafusion::physical_plan::expressions::Column
Represents the column at a given index in a RecordBatch
Implementations
impl Column[src]
pub fn new(name: &str) -> Self[src]
Create a new column expression
pub fn name(&self) -> &str[src]
Get the column name
Trait Implementations
impl Debug for Column[src]
impl Display for Column[src]
impl PhysicalExpr for Column[src]
fn as_any(&self) -> &dyn Any[src]
Return a reference to Any that can be used for downcasting
fn data_type(&self, input_schema: &Schema) -> Result<DataType>[src]
Get the data type of this expression, given the schema of the input
fn nullable(&self, input_schema: &Schema) -> Result<bool>[src]
Decide whehter this expression is nullable, given the schema of the input
fn evaluate(&self, batch: &RecordBatch) -> Result<ColumnarValue>[src]
Evaluate the expression
Auto Trait Implementations
impl RefUnwindSafe for Column[src]
impl Send for Column[src]
impl Sync for Column[src]
impl Unpin for Column[src]
impl UnwindSafe for Column[src]
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,
pub 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> Pointable for T
pub const ALIGN: usize
type Init = T
The type for initializers.
pub unsafe fn init(init: <T as Pointable>::Init) -> usize
pub unsafe fn deref<'a>(ptr: usize) -> &'a T
pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T
pub unsafe fn drop(ptr: usize)
impl<T> Same<T> for T
type Output = T
Should always be Self
impl<T> ToString for T where
T: Display + ?Sized, [src]
T: Display + ?Sized,
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.
pub 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.
pub 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>,